;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
;;;; *************************************************************************
;;;;
-;;;; $Id$
-;;;;
;;;; The CLSQL Object Oriented Data Manipulation Language (OODML).
;;;;
;;;; This file is part of CLSQL.
(in-package #:clsql-sys)
-(defun key-qualifier-for-instance (obj &key (database *default-database*))
- (let ((tb (view-table (class-of obj))))
+(defun key-qualifier-for-instance (obj &key (database *default-database*) this-class)
+ (let* ((obj-class (or this-class (class-of obj)))
+ (tb (view-table obj-class)))
(flet ((qfk (k)
(sql-operation '==
(sql-expression :attribute
k
(slot-value obj (slot-definition-name k))
database))))
- (let* ((keys (keyslots-for-class (class-of obj)))
- (keyxprs (mapcar #'qfk (reverse keys))))
- (cond
+ (let* ((keys (keyslots-for-class obj-class))
+ (keyxprs (mapcar #'qfk (reverse keys))))
+ (cond
((= (length keyxprs) 0) nil)
((= (length keyxprs) 1) (car keyxprs))
((> (length keyxprs) 1) (apply #'sql-operation 'and keyxprs)))))))
(defun generate-attribute-reference (vclass slotdef)
(cond
- ((eq (view-class-slot-db-kind slotdef) :base)
- (sql-expression :attribute (view-class-slot-column slotdef)
- :table (view-table vclass)))
- ((eq (view-class-slot-db-kind slotdef) :key)
- (sql-expression :attribute (view-class-slot-column slotdef)
- :table (view-table vclass)))
- (t nil)))
+ ((eq (view-class-slot-db-kind slotdef) :base)
+ (sql-expression :attribute (view-class-slot-column slotdef)
+ :table (view-table vclass)))
+ ((eq (view-class-slot-db-kind slotdef) :key)
+ (sql-expression :attribute (view-class-slot-column slotdef)
+ :table (view-table vclass)))
+ (t nil)))
;;
;; Function used by 'find-all'
;;
(defun generate-selection-list (vclass)
- (let ((sels nil))
- (dolist (slotdef (ordered-class-slots vclass))
- (let ((res (generate-attribute-reference vclass slotdef)))
- (when res
+ (let* ((sels nil)
+ (this-class vclass)
+ (slots (if (normalizedp vclass)
+ (labels ((getdslots ()
+ (let ((sl (ordered-class-direct-slots this-class)))
+ (cond (sl)
+ (t
+ (setf this-class
+ (car (class-direct-superclasses this-class)))
+ (getdslots))))))
+ (getdslots))
+ (ordered-class-slots this-class))))
+ (dolist (slotdef slots)
+ (let ((res (generate-attribute-reference this-class slotdef)))
+ (when res
(push (cons slotdef res) sels))))
(if sels
- sels
+ sels
(error "No slots of type :base in view-class ~A" (class-name vclass)))))
(let ((join-slotdefs nil))
(dolist (slotdef (ordered-class-slots vclass) join-slotdefs)
(when (and (eq :join (view-class-slot-db-kind slotdef))
- (eq retrieval-method (gethash :retrieval (view-class-slot-db-info slotdef))))
- (push slotdef join-slotdefs)))))
+ (eq retrieval-method (gethash :retrieval (view-class-slot-db-info slotdef))))
+ (push slotdef join-slotdefs)))))
(defun generate-immediate-joins-selection-list (vclass)
"Returns list of immediate join slots for a class."
(let (sels)
(dolist (joined-slot (generate-retrieval-joins-list vclass :immediate) sels)
(let* ((join-class-name (gethash :join-class (view-class-slot-db-info joined-slot)))
- (join-class (when join-class-name (find-class join-class-name))))
- (dolist (slotdef (ordered-class-slots join-class))
- (let ((res (generate-attribute-reference join-class slotdef)))
- (when res
- (push (cons slotdef res) sels))))))
+ (join-class (when join-class-name (find-class join-class-name))))
+ (dolist (slotdef (ordered-class-slots join-class))
+ (let ((res (generate-attribute-reference join-class slotdef)))
+ (when res
+ (push (cons slotdef res) sels))))))
sels))
(defmethod update-slot-from-db ((instance standard-db-object) slotdef value)
(declare (optimize (speed 3) #+cmu (extensions:inhibit-warnings 3)))
(let* ((slot-reader (view-class-slot-db-reader slotdef))
- (slot-name (slot-definition-name slotdef))
- (slot-type (specified-type slotdef)))
+ (slot-name (slot-definition-name slotdef))
+ (slot-type (specified-type slotdef)))
(cond ((and value (null slot-reader))
(setf (slot-value instance slot-name)
(read-sql-value value (delistify slot-type)
(view-database instance)
- (database-underlying-type
- (view-database instance)))))
- ((null value)
+ (database-underlying-type
+ (view-database instance)))))
+ ((null value)
(update-slot-with-null instance slot-name slotdef))
((typep slot-reader 'string)
(setf (slot-value instance slot-name)
(format nil slot-reader value)))
- ((typep slot-reader 'function)
+ ((typep slot-reader '(or symbol function))
(setf (slot-value instance slot-name)
(apply slot-reader (list value))))
(t
(error "Slot reader is of an unusual type.")))))
-(defmethod key-value-from-db (slotdef value database)
+(defmethod key-value-from-db (slotdef value database)
(declare (optimize (speed 3) #+cmu (extensions:inhibit-warnings 3)))
(let ((slot-reader (view-class-slot-db-reader slotdef))
(slot-type (specified-type slotdef)))
(cond ((and value (null slot-reader))
(read-sql-value value (delistify slot-type) database
- (database-underlying-type database)))
+ (database-underlying-type database)))
((null value)
nil)
((typep slot-reader 'string)
(format nil slot-reader value))
- ((typep slot-reader 'function)
+ ((typep slot-reader '(or symbol function))
(apply slot-reader (list value)))
(t
(error "Slot reader is of an unusual type.")))))
(defun db-value-from-slot (slotdef val database)
(let ((dbwriter (view-class-slot-db-writer slotdef))
- (dbtype (specified-type slotdef)))
+ (dbtype (specified-type slotdef)))
(typecase dbwriter
(string (format nil dbwriter val))
- (function (apply dbwriter (list val)))
+ ((and (or symbol function) (not null)) (apply dbwriter (list val)))
(t
(database-output-sql-as-type
- (typecase dbtype
- (cons (car dbtype))
- (t dbtype))
- val database (database-underlying-type database))))))
+ (typecase dbtype
+ (cons (car dbtype))
+ (t dbtype))
+ val database (database-underlying-type database))))))
(defun check-slot-type (slotdef val)
(let* ((slot-type (specified-type slotdef))
(when (and slot-type val)
(unless (typep val basetype)
(error 'sql-user-error
- :message
- (format nil "Invalid value ~A in slot ~A, not of type ~A."
- val (slot-definition-name slotdef) slot-type))))))
+ :message
+ (format nil "Invalid value ~A in slot ~A, not of type ~A."
+ val (slot-definition-name slotdef) slot-type))))))
;;
;; Called by find-all
;;
(defmethod get-slot-values-from-view (obj slotdeflist values)
- (flet ((update-slot (slot-def values)
- (update-slot-from-db obj slot-def values)))
- (mapc #'update-slot slotdeflist values)
- obj))
+ (flet ((update-slot (slot-def values)
+ (update-slot-from-db obj slot-def values)))
+ (mapc #'update-slot slotdeflist values)
+ obj))
(defmethod update-record-from-slot ((obj standard-db-object) slot &key
- (database *default-database*))
- (let* ((database (or (view-database obj) database))
- (vct (view-table (class-of obj)))
- (sd (slotdef-for-slot-with-class slot (class-of obj))))
- (check-slot-type sd (slot-value obj slot))
- (let* ((att (view-class-slot-column sd))
- (val (db-value-from-slot sd (slot-value obj slot) database)))
- (cond ((and vct sd (view-database obj))
- (update-records (sql-expression :table vct)
- :attributes (list (sql-expression :attribute att))
- :values (list val)
- :where (key-qualifier-for-instance
- obj :database database)
- :database database))
- ((and vct sd (not (view-database obj)))
- (insert-records :into (sql-expression :table vct)
- :attributes (list (sql-expression :attribute att))
- :values (list val)
- :database database)
- (setf (slot-value obj 'view-database) database))
- (t
- (error "Unable to update record.")))))
- (values))
+ database)
+ (update-record-from-slots obj (list slot) :database database))
(defmethod update-record-from-slots ((obj standard-db-object) slots &key
- (database *default-database*))
- (let* ((database (or (view-database obj) database))
- (vct (view-table (class-of obj)))
- (sds (slotdefs-for-slots-with-class slots (class-of obj)))
- (avps (mapcar #'(lambda (s)
- (let ((val (slot-value
- obj (slot-definition-name s))))
- (check-slot-type s val)
- (list (sql-expression
- :attribute (view-class-slot-column s))
- (db-value-from-slot s val database))))
- sds)))
- (cond ((and avps (view-database obj))
- (update-records (sql-expression :table vct)
- :av-pairs avps
- :where (key-qualifier-for-instance
- obj :database database)
- :database database))
- ((and avps (not (view-database obj)))
- (insert-records :into (sql-expression :table vct)
- :av-pairs avps
- :database database)
- (setf (slot-value obj 'view-database) database))
- (t
- (error "Unable to update records"))))
+ (database *default-database*))
+ (let ((database (or database (view-database obj) *default-database*))
+ (pk nil))
+ (labels
+ ((sstoredp (slot) (member (view-class-slot-db-kind slot) '(:base :key)))
+ (sboundp (slot) (slot-boundp obj (slot-definition-name slot)))
+ (slot-value-list (slot)
+ (let ((value (slot-value obj (slot-definition-name slot))))
+ (check-slot-type slot value)
+ (list (sql-expression :attribute (view-class-slot-column slot))
+ (db-value-from-slot slot value database))))
+
+ (save-slots-for-class (view-class stored-slot-defs)
+ (let ((pk-slot (car (keyslots-for-class view-class)))
+ (table (sql-expression :table (view-table view-class)))
+ (pclass (car (class-direct-superclasses view-class)))
+
+ direct-slots ; the slots to save on this iteration
+ parent-slots ; slots to handle recursively
+ )
+ (if (normalizedp view-class)
+ (let ((cdsn (mapcar #'slot-definition-name
+ (class-direct-slots view-class))))
+ (dolist (s stored-slot-defs)
+ (if (member (slot-definition-name s) cdsn)
+ (push s direct-slots)
+ (push s parent-slots))))
+ ;;not normalized, do everything now.
+ (setf direct-slots stored-slot-defs))
+ '(break "Class:~a ~%direct-slots:~a ~%parent-slots:~a ~%~a"
+ view-class direct-slots parent-slots
+ (class-direct-slots view-class))
+ (when parent-slots
+ ;;call recursively, collect primary key if we have it
+ (save-slots-for-class pclass parent-slots)
+ (when (and pk pk-slot)
+ (setf (slot-value obj (slot-definition-name pk-slot)) pk)))
+
+ ;;we've delayed doing the unbound test till here because
+ ;;the keys are sometimes only bound while updating the pclass
+ (let ((av-pairs (mapcar #'slot-value-list
+ (remove-if-not #'sboundp direct-slots))))
+ (cond
+ ((null av-pairs) nil)
+ ((view-database obj)
+ (update-records table
+ :av-pairs av-pairs
+ :where (key-qualifier-for-instance
+ obj :database database
+ :this-class view-class)
+ :database database)
+ (when (and pk-slot (not pk))
+ (setf pk (slot-value obj (slot-definition-name pk-slot))))
+ pk)
+ (t
+ (insert-records :into table
+ :av-pairs av-pairs
+ :database database)
+ (when (and pk-slot (not pk))
+ (setf pk (if (member :auto-increment (listify (view-class-slot-db-constraints pk-slot)))
+ (setf (slot-value obj (slot-definition-name pk-slot))
+ (database-last-autoincrement-id database
+ table
+ pk-slot))))
+
+ )
+ pk))))))
+
+
+ (save-slots-for-class
+ (class-of obj)
+ ;;convert to slot-defs, remove any non-stored.
+ (loop for s in slots
+ for sd = (etypecase s
+ (symbol (slotdef-for-slot-with-class s (class-of obj)))
+ (slot-definition s))
+ when (sstoredp sd)
+ collect sd))
+ ;;this may just be a NOP.
+ (setf (slot-value obj 'view-database) database)))
+
(values))
(defmethod update-records-from-instance ((obj standard-db-object)
- &key (database *default-database*))
- (let ((database (or (view-database obj) database)))
- (labels ((slot-storedp (slot)
- (and (member (view-class-slot-db-kind slot) '(:base :key))
- (slot-boundp obj (slot-definition-name slot))))
- (slot-value-list (slot)
- (let ((value (slot-value obj (slot-definition-name slot))))
- (check-slot-type slot value)
- (list (sql-expression :attribute (view-class-slot-column slot))
- (db-value-from-slot slot value database)))))
- (let* ((view-class (class-of obj))
- (view-class-table (view-table view-class))
- (slots (remove-if-not #'slot-storedp
- (ordered-class-slots view-class)))
- (record-values (mapcar #'slot-value-list slots)))
- (unless record-values
- (error "No settable slots."))
- (if (view-database obj)
- (update-records (sql-expression :table view-class-table)
- :av-pairs record-values
- :where (key-qualifier-for-instance
- obj :database database)
- :database database)
- (progn
- (insert-records :into (sql-expression :table view-class-table)
- :av-pairs record-values
- :database database)
- (setf (slot-value obj 'view-database) database))))))
- (values))
+ &key database)
+ (update-record-from-slots obj (class-slots (class-of obj)) :database database))
(defmethod delete-instance-records ((instance standard-db-object))
(let ((vt (sql-expression :table (view-table (class-of instance))))
- (vd (view-database instance)))
+ (vd (view-database instance)))
(if vd
- (let ((qualifier (key-qualifier-for-instance instance :database vd)))
- (delete-records :from vt :where qualifier :database vd)
- (setf (slot-value instance 'view-database) nil)
+ (let ((qualifier (key-qualifier-for-instance instance :database vd)))
+ (delete-records :from vt :where qualifier :database vd)
+ (setf (record-caches vd) nil)
+ (setf (slot-value instance 'view-database) nil)
(values))
- (signal-no-database-error vd))))
+ (signal-no-database-error vd))))
(defmethod update-instance-from-records ((instance standard-db-object)
- &key (database *default-database*))
- (let* ((view-class (find-class (class-name (class-of instance))))
- (view-table (sql-expression :table (view-table view-class)))
- (vd (or (view-database instance) database))
- (view-qual (key-qualifier-for-instance instance :database vd))
- (sels (generate-selection-list view-class))
- (res (apply #'select (append (mapcar #'cdr sels)
- (list :from view-table
- :where view-qual)
- (list :result-types nil)))))
- (when res
- (get-slot-values-from-view instance (mapcar #'car sels) (car res)))))
+ &key (database *default-database*)
+ this-class)
+ (let* ((view-class (or this-class (class-of instance)))
+ (pclass (car (class-direct-superclasses view-class)))
+ (pres nil))
+ (when (normalizedp view-class)
+ (setf pres (update-instance-from-records instance :database database
+ :this-class pclass)))
+ (let* ((view-table (sql-expression :table (view-table view-class)))
+ (vd (or (view-database instance) database))
+ (view-qual (key-qualifier-for-instance instance :database vd
+ :this-class view-class))
+ (sels (generate-selection-list view-class))
+ (res nil))
+ (cond (view-qual
+ (setf res (apply #'select (append (mapcar #'cdr sels)
+ (list :from view-table
+ :where view-qual
+ :result-types nil
+ :database vd))))
+ (when res
+ (setf (slot-value instance 'view-database) vd)
+ (get-slot-values-from-view instance (mapcar #'car sels) (car res))))
+ (pres)
+ (t nil)))))
(defmethod update-slot-from-record ((instance standard-db-object)
slot &key (database *default-database*))
(let* ((view-class (find-class (class-name (class-of instance))))
- (view-table (sql-expression :table (view-table view-class)))
- (vd (or (view-database instance) database))
- (view-qual (key-qualifier-for-instance instance :database vd))
- (slot-def (slotdef-for-slot-with-class slot view-class))
- (att-ref (generate-attribute-reference view-class slot-def))
- (res (select att-ref :from view-table :where view-qual
- :result-types nil)))
- (when res
- (get-slot-values-from-view instance (list slot-def) (car res)))))
-
+ (slot-def (slotdef-for-slot-with-class slot view-class)))
+ (when (normalizedp view-class)
+ ;; If it's normalized, find the class that actually contains
+ ;; the slot that's tied to the db
+ (setf view-class
+ (do ((this-class view-class
+ (car (class-direct-superclasses this-class))))
+ ((member slot
+ (mapcar #'(lambda (esd) (slot-definition-name esd))
+ (ordered-class-direct-slots this-class)))
+ this-class))))
+ (let* ((view-table (sql-expression :table (view-table view-class)))
+ (vd (or (view-database instance) database))
+ (view-qual (key-qualifier-for-instance instance :database vd
+ :this-class view-class))
+ (att-ref (generate-attribute-reference view-class slot-def))
+ (res (select att-ref :from view-table :where view-qual
+ :result-types nil)))
+ (when res
+ (setf (slot-value instance 'view-database) vd)
+ (get-slot-values-from-view instance (list slot-def) (car res))))))
(defmethod update-slot-with-null ((object standard-db-object)
- slotname
- slotdef)
+ slotname
+ slotdef)
(setf (slot-value object slotname) (slot-value slotdef 'void-value)))
(defvar +no-slot-value+ '+no-slot-value+)
(defsql sql-slot-value (:symbol "slot-value") (classname slot &optional (value +no-slot-value+) (database *default-database*))
- (let* ((class (find-class classname))
- (sld (slotdef-for-slot-with-class slot class)))
- (if sld
- (if (eq value +no-slot-value+)
- (sql-expression :attribute (view-class-slot-column sld)
- :table (view-table class))
- (db-value-from-slot
- sld
- value
- database))
- (error "Unknown slot ~A for class ~A" slot classname))))
+ (let* ((class (find-class classname))
+ (sld (slotdef-for-slot-with-class slot class)))
+ (if sld
+ (if (eq value +no-slot-value+)
+ (sql-expression :attribute (view-class-slot-column sld)
+ :table (view-table class))
+ (db-value-from-slot
+ sld
+ value
+ database))
+ (error "Unknown slot ~A for class ~A" slot classname))))
(defsql sql-view-class (:symbol "view-class") (classname &optional (database *default-database*))
- (declare (ignore database))
- (let* ((class (find-class classname)))
- (unless (view-table class)
- (error "No view-table for class ~A" classname))
- (sql-expression :table (view-table class))))
+ (declare (ignore database))
+ (let* ((class (find-class classname)))
+ (unless (view-table class)
+ (error "No view-table for class ~A" classname))
+ (sql-expression :table (view-table class))))
(defmethod database-get-type-specifier (type args database db-type)
(declare (ignore database db-type))
(if args
(format nil "INT(~A)" (car args))
- "INT"))
+ "INT"))
-(deftype tinyint ()
+(deftype tinyint ()
"An 8-bit integer, this width may vary by SQL implementation."
'integer)
(declare (ignore args database db-type))
"INT")
-(deftype smallint ()
- "An integer smaller than a 32-bit integer, this width may vary by SQL implementation."
+(deftype smallint ()
+ "An integer smaller than a 32-bit integer. this width may vary by SQL implementation."
'integer)
(defmethod database-get-type-specifier ((type (eql 'smallint)) args database db-type)
(declare (ignore args database db-type))
"INT")
-(deftype bigint ()
+(deftype mediumint ()
+ "An integer smaller than a 32-bit integer, but may be larger than a smallint. This width may vary by SQL implementation."
+ 'integer)
+
+(defmethod database-get-type-specifier ((type (eql 'mediumint)) args database db-type)
+ (declare (ignore args database db-type))
+ "INT")
+
+(deftype bigint ()
"An integer larger than a 32-bit integer, this width may vary by SQL implementation."
'integer)
(declare (ignore args database db-type))
"BIGINT")
-(deftype varchar ()
+(deftype varchar (&optional size)
"A variable length string for the SQL varchar type."
+ (declare (ignore size))
'string)
(defmethod database-get-type-specifier ((type (eql 'varchar)) args
(format nil "CHAR(~A)" (car args))
(format nil "VARCHAR(~D)" *default-string-length*)))
-(deftype universal-time ()
+(deftype universal-time ()
"A positive integer as returned by GET-UNIVERSAL-TIME."
'(integer 1 *))
(declare (ignore args database db-type))
"TIMESTAMP")
+(defmethod database-get-type-specifier ((type (eql 'date)) args database db-type)
+ (declare (ignore args database db-type))
+ "DATE")
+
(defmethod database-get-type-specifier ((type (eql 'duration)) args database db-type)
(declare (ignore database args db-type))
"VARCHAR")
(format nil "FLOAT(~A)" (car args))
"FLOAT"))
-(deftype generalized-boolean ()
+(deftype generalized-boolean ()
"A type which outputs a SQL boolean value, though any lisp type can be stored in the slot."
t)
(defmethod database-get-type-specifier ((type (eql 'number)) args database db-type)
(declare (ignore database db-type))
(cond
- ((and (consp args) (= (length args) 2))
- (format nil "NUMBER(~D,~D)" (first args) (second args)))
- ((and (consp args) (= (length args) 1))
- (format nil "NUMBER(~D)" (first args)))
- (t
- "NUMBER")))
+ ((and (consp args) (= (length args) 2))
+ (format nil "NUMBER(~D,~D)" (first args) (second args)))
+ ((and (consp args) (= (length args) 1))
+ (format nil "NUMBER(~D)" (first args)))
+ (t
+ "NUMBER")))
(defmethod database-get-type-specifier ((type (eql 'char)) args database db-type)
(declare (ignore database db-type))
(defmethod database-output-sql-as-type ((type (eql 'symbol)) val database db-type)
(declare (ignore database db-type))
(if val
- (concatenate 'string
- (package-name (symbol-package val))
- "::"
- (symbol-name val))
- ""))
+ (concatenate 'string
+ (package-name (symbol-package val))
+ "::"
+ (symbol-name val))
+ ""))
(defmethod database-output-sql-as-type ((type (eql 'keyword)) val database db-type)
(declare (ignore database db-type))
(defmethod database-output-sql-as-type ((type (eql 'float)) val database db-type)
(declare (ignore database db-type))
- (let ((*read-default-float-format* (type-of val)))
- (format nil "~F" val)))
+ (if (eq (type-of val) 'null)
+ nil
+ (let ((*read-default-float-format* (type-of val)))
+ (format nil "~F" val))))
(defmethod read-sql-value (val type database db-type)
- (declare (ignore type database db-type))
- (read-from-string val))
+ (declare (ignore database db-type))
+ (cond
+ ((null type) val) ;;we have no desired type, just give the value
+ ((typep val type) val) ;;check that it hasn't already been converted.
+ ((typep val 'string) (read-from-string val)) ;;maybe read will just take care of it?
+ (T (error "Unable to read-sql-value ~a as type ~a" val type))))
(defmethod read-sql-value (val (type (eql 'string)) database db-type)
(declare (ignore database db-type))
(defmethod read-sql-value (val (type (eql 'char)) database db-type)
(declare (ignore database db-type))
(schar val 0))
-
+
(defmethod read-sql-value (val (type (eql 'keyword)) database db-type)
(declare (ignore database db-type))
(when (< 0 (length val))
- (intern (symbol-name-default-case val)
- (find-package '#:keyword))))
+ (intern (symbol-name-default-case val)
+ (find-package '#:keyword))))
(defmethod read-sql-value (val (type (eql 'symbol)) database db-type)
(declare (ignore database db-type))
(declare (ignore database db-type))
;; writing 1.0 writes 1, so we we *really* want a float, must do (float ...)
(etypecase val
- (string
- (float (read-from-string val)))
- (float
- val)))
+ (string (float (read-from-string val)))
+ (float val)))
+
+(defmethod read-sql-value (val (type (eql 'double-float)) database db-type)
+ (declare (ignore database db-type))
+ ;; writing 1.0 writes 1, so if we *really* want a float, must do (float ...)
+ (etypecase val
+ (string (float
+ (let ((*read-default-float-format* 'double-float))
+ (read-from-string val))
+ 1.0d0))
+ (double-float val)
+ (float (coerce val 'double-float))))
(defmethod read-sql-value (val (type (eql 'boolean)) database db-type)
(declare (ignore database db-type))
(unless (eq 'NULL val)
(parse-timestring val)))
+(defmethod read-sql-value (val (type (eql 'date)) database db-type)
+ (declare (ignore database db-type))
+ (unless (eq 'NULL val)
+ (parse-datestring val)))
+
(defmethod read-sql-value (val (type (eql 'duration)) database db-type)
(declare (ignore database db-type))
(unless (or (eq 'NULL val)
#+ignore
(defun fault-join-target-slot (class object slot-def)
(let* ((res (fault-join-slot-raw class object slot-def))
- (dbi (view-class-slot-db-info slot-def))
- (target-name (gethash :target-slot dbi))
- (target-class (find-class target-name)))
+ (dbi (view-class-slot-db-info slot-def))
+ (target-name (gethash :target-slot dbi))
+ (target-class (find-class target-name)))
(when res
(mapcar (lambda (obj)
- (list
- (car
- (fault-join-slot-raw
- target-class
- obj
- (find target-name (class-slots (class-of obj))
- :key #'slot-definition-name)))
- obj))
- res)
+ (list
+ (car
+ (fault-join-slot-raw
+ target-class
+ obj
+ (find target-name (class-slots (class-of obj))
+ :key #'slot-definition-name)))
+ obj))
+ res)
#+ignore ;; this doesn't work when attempting to call slot-value
(mapcar (lambda (obj)
- (cons obj (slot-value obj ts))) res))))
+ (cons obj (slot-value obj ts))) res))))
(defun fault-join-target-slot (class object slot-def)
(let* ((dbi (view-class-slot-db-info slot-def))
- (ts (gethash :target-slot dbi))
- (jc (gethash :join-class dbi))
- (ts-view-table (view-table (find-class ts)))
- (jc-view-table (view-table (find-class jc)))
- (tdbi (view-class-slot-db-info
- (find ts (class-slots (find-class jc))
- :key #'slot-definition-name)))
- (retrieval (gethash :retrieval tdbi))
- (jq (join-qualifier class object slot-def))
- (key (slot-value object (gethash :home-key dbi))))
+ (ts (gethash :target-slot dbi))
+ (jc (gethash :join-class dbi))
+ (jc-view-table (view-table (find-class jc)))
+ (tdbi (view-class-slot-db-info
+ (find ts (class-slots (find-class jc))
+ :key #'slot-definition-name)))
+ (retrieval (gethash :retrieval tdbi))
+ (tsc (gethash :join-class tdbi))
+ (ts-view-table (view-table (find-class tsc)))
+ (jq (join-qualifier class object slot-def))
+ (key (slot-value object (gethash :home-key dbi))))
+
(when jq
(ecase retrieval
- (:immediate
- (let ((res
- (find-all (list ts)
- :inner-join (sql-expression :table jc-view-table)
- :on (sql-operation
- '==
- (sql-expression
- :attribute (gethash :foreign-key tdbi)
- :table ts-view-table)
- (sql-expression
- :attribute (gethash :home-key tdbi)
- :table jc-view-table))
- :where jq
- :result-types :auto)))
- (mapcar #'(lambda (i)
- (let* ((instance (car i))
- (jcc (make-instance jc :view-database (view-database instance))))
- (setf (slot-value jcc (gethash :foreign-key dbi))
- key)
- (setf (slot-value jcc (gethash :home-key tdbi))
- (slot-value instance (gethash :foreign-key tdbi)))
- (list instance jcc)))
- res)))
- (:deferred
- ;; just fill in minimal slots
- (mapcar
- #'(lambda (k)
- (let ((instance (make-instance ts :view-database (view-database object)))
- (jcc (make-instance jc :view-database (view-database object)))
- (fk (car k)))
- (setf (slot-value instance (gethash :home-key tdbi)) fk)
- (setf (slot-value jcc (gethash :foreign-key dbi))
- key)
- (setf (slot-value jcc (gethash :home-key tdbi))
- fk)
- (list instance jcc)))
- (select (sql-expression :attribute (gethash :foreign-key tdbi) :table jc-view-table)
- :from (sql-expression :table jc-view-table)
- :where jq)))))))
+ (:immediate
+ (let ((res
+ (find-all (list tsc)
+ :inner-join (sql-expression :table jc-view-table)
+ :on (sql-operation
+ '==
+ (sql-expression
+ :attribute (gethash :foreign-key tdbi)
+ :table ts-view-table)
+ (sql-expression
+ :attribute (gethash :home-key tdbi)
+ :table jc-view-table))
+ :where jq
+ :result-types :auto
+ :database (view-database object))))
+ (mapcar #'(lambda (i)
+ (let* ((instance (car i))
+ (jcc (make-instance jc :view-database (view-database instance))))
+ (setf (slot-value jcc (gethash :foreign-key dbi))
+ key)
+ (setf (slot-value jcc (gethash :home-key tdbi))
+ (slot-value instance (gethash :foreign-key tdbi)))
+ (list instance jcc)))
+ res)))
+ (:deferred
+ ;; just fill in minimal slots
+ (mapcar
+ #'(lambda (k)
+ (let ((instance (make-instance tsc :view-database (view-database object)))
+ (jcc (make-instance jc :view-database (view-database object)))
+ (fk (car k)))
+ (setf (slot-value instance (gethash :home-key tdbi)) fk)
+ (setf (slot-value jcc (gethash :foreign-key dbi))
+ key)
+ (setf (slot-value jcc (gethash :home-key tdbi))
+ fk)
+ (list instance jcc)))
+ (select (sql-expression :attribute (gethash :foreign-key tdbi) :table jc-view-table)
+ :from (sql-expression :table jc-view-table)
+ :where jq
+ :database (view-database object))))))))
;;; Remote Joins
UPDATE-OBJECT-JOINS.")
(defun update-objects-joins (objects &key (slots t) (force-p t)
- class-name (max-len
- *default-update-objects-max-len*))
+ class-name (max-len
+ *default-update-objects-max-len*))
"Updates from the records of the appropriate database tables
the join slots specified by SLOTS in the supplied list of View
Class instances OBJECTS. SLOTS is t by default which means that
(unless class-name
(setq class-name (class-name (class-of (first objects)))))
(let* ((class (find-class class-name))
- (class-slots (ordered-class-slots class))
- (slotdefs
- (if (eq t slots)
- (generate-retrieval-joins-list class :deferred)
- (remove-if #'null
- (mapcar #'(lambda (name)
- (let ((slotdef (find name class-slots :key #'slot-definition-name)))
- (unless slotdef
- (warn "Unable to find slot named ~S in class ~S." name class))
- slotdef))
- slots)))))
+ (class-slots (ordered-class-slots class))
+ (slotdefs
+ (if (eq t slots)
+ (generate-retrieval-joins-list class :deferred)
+ (remove-if #'null
+ (mapcar #'(lambda (name)
+ (let ((slotdef (find name class-slots :key #'slot-definition-name)))
+ (unless slotdef
+ (warn "Unable to find slot named ~S in class ~S." name class))
+ slotdef))
+ slots)))))
(dolist (slotdef slotdefs)
- (let* ((dbi (view-class-slot-db-info slotdef))
- (slotdef-name (slot-definition-name slotdef))
- (foreign-key (gethash :foreign-key dbi))
- (home-key (gethash :home-key dbi))
- (object-keys
- (remove-duplicates
- (if force-p
- (mapcar #'(lambda (o) (slot-value o home-key)) objects)
- (remove-if #'null
- (mapcar
- #'(lambda (o) (if (slot-boundp o slotdef-name)
- nil
- (slot-value o home-key)))
- objects)))))
- (n-object-keys (length object-keys))
- (query-len (or max-len n-object-keys)))
-
- (do ((i 0 (+ i query-len)))
- ((>= i n-object-keys))
- (let* ((keys (if max-len
- (subseq object-keys i (min (+ i query-len) n-object-keys))
- object-keys))
- (results (find-all (list (gethash :join-class dbi))
- :where (make-instance 'sql-relational-exp
- :operator 'in
- :sub-expressions (list (sql-expression :attribute foreign-key)
- keys))
- :result-types :auto
- :flatp t)))
- (dolist (object objects)
- (when (or force-p (not (slot-boundp object slotdef-name)))
- (let ((res (find (slot-value object home-key) results
- :key #'(lambda (res) (slot-value res foreign-key))
- :test #'equal)))
- (when res
- (setf (slot-value object slotdef-name) res)))))))))))
+ (let* ((dbi (view-class-slot-db-info slotdef))
+ (slotdef-name (slot-definition-name slotdef))
+ (foreign-key (gethash :foreign-key dbi))
+ (home-key (gethash :home-key dbi))
+ (object-keys
+ (remove-duplicates
+ (if force-p
+ (mapcar #'(lambda (o) (slot-value o home-key)) objects)
+ (remove-if #'null
+ (mapcar
+ #'(lambda (o) (if (slot-boundp o slotdef-name)
+ nil
+ (slot-value o home-key)))
+ objects)))))
+ (n-object-keys (length object-keys))
+ (query-len (or max-len n-object-keys)))
+
+ (do ((i 0 (+ i query-len)))
+ ((>= i n-object-keys))
+ (let* ((keys (if max-len
+ (subseq object-keys i (min (+ i query-len) n-object-keys))
+ object-keys))
+ (results (unless (gethash :target-slot dbi)
+ (find-all (list (gethash :join-class dbi))
+ :where (make-instance 'sql-relational-exp
+ :operator 'in
+ :sub-expressions (list (sql-expression :attribute foreign-key)
+ keys))
+ :result-types :auto
+ :flatp t)) ))
+
+ (dolist (object objects)
+ (when (or force-p (not (slot-boundp object slotdef-name)))
+ (let ((res (if results
+ (remove-if-not #'(lambda (obj)
+ (equal obj (slot-value
+ object
+ home-key)))
+ results
+ :key #'(lambda (res)
+ (slot-value res
+ foreign-key)))
+
+ (progn
+ (when (gethash :target-slot dbi)
+ (fault-join-target-slot class object slotdef))))))
+ (when res
+ (setf (slot-value object slotdef-name)
+ (if (gethash :set dbi) res (car res)))))))))))))
(values))
-
+
(defun fault-join-slot-raw (class object slot-def)
(let* ((dbi (view-class-slot-db-info slot-def))
- (jc (gethash :join-class dbi)))
+ (jc (gethash :join-class dbi)))
(let ((jq (join-qualifier class object slot-def)))
- (when jq
- (select jc :where jq :flatp t :result-types nil)))))
+ (when jq
+ (select jc :where jq :flatp t :result-types nil
+ :database (view-database object))))))
(defun fault-join-slot (class object slot-def)
(let* ((dbi (view-class-slot-db-info slot-def))
- (ts (gethash :target-slot dbi)))
+ (ts (gethash :target-slot dbi)))
(if (and ts (gethash :set dbi))
- (fault-join-target-slot class object slot-def)
- (let ((res (fault-join-slot-raw class object slot-def)))
- (when res
- (cond
- ((and ts (not (gethash :set dbi)))
- (mapcar (lambda (obj) (slot-value obj ts)) res))
- ((and (not ts) (not (gethash :set dbi)))
- (car res))
- ((and (not ts) (gethash :set dbi))
- res)))))))
+ (fault-join-target-slot class object slot-def)
+ (let ((res (fault-join-slot-raw class object slot-def)))
+ (when res
+ (cond
+ ((and ts (not (gethash :set dbi)))
+ (mapcar (lambda (obj) (slot-value obj ts)) res))
+ ((and (not ts) (not (gethash :set dbi)))
+ (car res))
+ ((and (not ts) (gethash :set dbi))
+ res)))))))
+
+;;;; Should we not return the whole result, instead of only
+;;;; the one slot-value? We get all the values from the db
+;;;; anyway, so?
+(defun fault-join-normalized-slot (class object slot-def)
+ (labels ((getsc (this-class)
+ (let ((sc (car (class-direct-superclasses this-class))))
+ (if (key-slots sc)
+ sc
+ (getsc sc)))))
+ (let* ((sc (getsc class))
+ (hk (slot-definition-name (car (key-slots class))))
+ (fk (slot-definition-name (car (key-slots sc)))))
+ (let ((jq (sql-operation '==
+ (typecase fk
+ (symbol
+ (sql-expression
+ :attribute
+ (view-class-slot-column
+ (slotdef-for-slot-with-class fk sc))
+ :table (view-table sc)))
+ (t fk))
+ (typecase hk
+ (symbol
+ (slot-value object hk))
+ (t hk)))))
+
+ ;; Caching nil in next select, because in normalized mode
+ ;; records can be changed through other instances (children,
+ ;; parents) so changes possibly won't be noticed
+ (let ((res (car (select (class-name sc) :where jq
+ :flatp t :result-types nil
+ :caching nil
+ :database (view-database object))))
+ (slot-name (slot-definition-name slot-def)))
+
+ ;; If current class is normalized and wanted slot is not
+ ;; a direct member, recurse up
+ (if (and (normalizedp class)
+ (not (member slot-name
+ (mapcar #'(lambda (esd) (slot-definition-name esd))
+ (ordered-class-direct-slots class))))
+ (not (slot-boundp res slot-name)))
+ (fault-join-normalized-slot sc res slot-def)
+ (slot-value res slot-name)))))) )
(defun join-qualifier (class object slot-def)
- (declare (ignore class))
- (let* ((dbi (view-class-slot-db-info slot-def))
- (jc (find-class (gethash :join-class dbi)))
- ;;(ts (gethash :target-slot dbi))
- ;;(tsdef (if ts (slotdef-for-slot-with-class ts jc)))
- (foreign-keys (gethash :foreign-key dbi))
- (home-keys (gethash :home-key dbi)))
- (when (every #'(lambda (slt)
- (and (slot-boundp object slt)
- (not (null (slot-value object slt)))))
- (if (listp home-keys) home-keys (list home-keys)))
- (let ((jc
- (mapcar #'(lambda (hk fk)
- (let ((fksd (slotdef-for-slot-with-class fk jc)))
- (sql-operation '==
- (typecase fk
- (symbol
- (sql-expression
- :attribute
- (view-class-slot-column fksd)
- :table (view-table jc)))
- (t fk))
- (typecase hk
- (symbol
- (slot-value object hk))
- (t
- hk)))))
- (if (listp home-keys)
- home-keys
- (list home-keys))
- (if (listp foreign-keys)
- foreign-keys
- (list foreign-keys)))))
- (when jc
- (if (> (length jc) 1)
- (apply #'sql-and jc)
- jc))))))
+ (declare (ignore class))
+ (let* ((dbi (view-class-slot-db-info slot-def))
+ (jc (find-class (gethash :join-class dbi)))
+ ;;(ts (gethash :target-slot dbi))
+ ;;(tsdef (if ts (slotdef-for-slot-with-class ts jc)))
+ (foreign-keys (gethash :foreign-key dbi))
+ (home-keys (gethash :home-key dbi)))
+ (when (every #'(lambda (slt)
+ (and (slot-boundp object slt)
+ (not (null (slot-value object slt)))))
+ (if (listp home-keys) home-keys (list home-keys)))
+ (let ((jc
+ (mapcar #'(lambda (hk fk)
+ (let ((fksd (slotdef-for-slot-with-class fk jc)))
+ (sql-operation '==
+ (typecase fk
+ (symbol
+ (sql-expression
+ :attribute
+ (view-class-slot-column fksd)
+ :table (view-table jc)))
+ (t fk))
+ (typecase hk
+ (symbol
+ (slot-value object hk))
+ (t
+ hk)))))
+ (if (listp home-keys)
+ home-keys
+ (list home-keys))
+ (if (listp foreign-keys)
+ foreign-keys
+ (list foreign-keys)))))
+ (when jc
+ (if (> (length jc) 1)
+ (apply #'sql-and jc)
+ jc))))))
;; FIXME: add retrieval immediate for efficiency
;; For example, for (select 'employee-address) in test suite =>
(defun build-objects (vals sclasses immediate-join-classes sels immediate-joins database refresh flatp instances)
"Used by find-all to build objects."
(labels ((build-object (vals vclass jclasses selects immediate-selects instance)
- (let* ((db-vals (butlast vals (- (list-length vals)
- (list-length selects))))
- (obj (if instance instance (make-instance (class-name vclass) :view-database database)))
- (join-vals (subseq vals (list-length selects)))
- (joins (mapcar #'(lambda (c) (when c (make-instance c :view-database database)))
- jclasses)))
- ;;(format t "db-vals: ~S, join-values: ~S~%" db-vals join-vals)
- ;; use refresh keyword here
- (setf obj (get-slot-values-from-view obj (mapcar #'car selects) db-vals))
- (mapc #'(lambda (jc) (get-slot-values-from-view jc (mapcar #'car immediate-selects) join-vals))
- joins)
- (mapc
- #'(lambda (jc)
- (let ((slot (find (class-name (class-of jc)) (class-slots vclass)
- :key #'(lambda (slot)
- (when (and (eq :join (view-class-slot-db-kind slot))
- (eq (slot-definition-name slot)
- (gethash :join-class (view-class-slot-db-info slot))))
- (slot-definition-name slot))))))
- (when slot
- (setf (slot-value obj (slot-definition-name slot)) jc))))
- joins)
- (when refresh (instance-refreshed obj))
- obj)))
+ (let* ((db-vals (butlast vals (- (list-length vals)
+ (list-length selects))))
+ (obj (if instance instance (make-instance (class-name vclass) :view-database database)))
+ (join-vals (subseq vals (list-length selects)))
+ (joins (mapcar #'(lambda (c) (when c (make-instance c :view-database database)))
+ jclasses)))
+
+ ;;(format t "joins: ~S~%db-vals: ~S~%join-values: ~S~%selects: ~S~%immediate-selects: ~S~%"
+ ;;joins db-vals join-vals selects immediate-selects)
+
+ ;; use refresh keyword here
+ (setf obj (get-slot-values-from-view obj (mapcar #'car selects) db-vals))
+ (mapc #'(lambda (jo)
+ ;; find all immediate-select slots and join-vals for this object
+ (let* ((jo-class (class-of jo))
+ (slots
+ (if (normalizedp jo-class)
+ (class-direct-slots jo-class)
+ (class-slots jo-class)))
+ (pos-list (remove-if #'null
+ (mapcar
+ #'(lambda (s)
+ (position s immediate-selects
+ :key #'car
+ :test #'eq))
+ slots))))
+ (get-slot-values-from-view jo
+ (mapcar #'car
+ (mapcar #'(lambda (pos)
+ (nth pos immediate-selects))
+ pos-list))
+ (mapcar #'(lambda (pos) (nth pos join-vals))
+ pos-list))))
+ joins)
+ (mapc
+ #'(lambda (jc)
+ (let* ((vslots
+ (class-slots vclass))
+ (slot (find (class-name (class-of jc)) vslots
+ :key #'(lambda (slot)
+ (when (and (eq :join (view-class-slot-db-kind slot))
+ (eq (slot-definition-name slot)
+ (gethash :join-class (view-class-slot-db-info slot))))
+ (slot-definition-name slot))))))
+ (when slot
+ (setf (slot-value obj (slot-definition-name slot)) jc))))
+ joins)
+ (when refresh (instance-refreshed obj))
+ obj)))
(let* ((objects
- (mapcar #'(lambda (sclass jclass sel immediate-join instance)
- (prog1
- (build-object vals sclass jclass sel immediate-join instance)
- (setf vals (nthcdr (+ (list-length sel) (list-length immediate-join))
- vals))))
- sclasses immediate-join-classes sels immediate-joins instances)))
+ (mapcar #'(lambda (sclass jclass sel immediate-join instance)
+ (prog1
+ (build-object vals sclass jclass sel immediate-join instance)
+ (setf vals (nthcdr (+ (list-length sel) (list-length immediate-join))
+ vals))))
+ sclasses immediate-join-classes sels immediate-joins instances)))
(if (and flatp (= (length sclasses) 1))
- (car objects)
- objects))))
-
-(defun find-all (view-classes
- &rest args
- &key all set-operation distinct from where group-by having
- order-by offset limit refresh flatp result-types
- inner-join on
- (database *default-database*)
- instances)
+ (car objects)
+ objects))))
+
+(defun find-all (view-classes
+ &rest args
+ &key all set-operation distinct from where group-by having
+ order-by offset limit refresh flatp result-types
+ inner-join on
+ (database *default-database*)
+ instances)
"Called by SELECT to generate object query results when the
View Classes VIEW-CLASSES are passed as arguments to SELECT."
- (declare (ignore all set-operation group-by having offset limit inner-join on)
- (optimize (debug 3) (speed 1)))
+ (declare (ignore all set-operation group-by having offset limit inner-join on))
(flet ((ref-equal (ref1 ref2)
(string= (sql-output ref1 database)
(sql-output ref2 database)))
(remf args :result-types)
(remf args :instances)
(let* ((*db-deserializing* t)
- (sclasses (mapcar #'find-class view-classes))
- (immediate-join-slots
- (mapcar #'(lambda (c) (generate-retrieval-joins-list c :immediate)) sclasses))
- (immediate-join-classes
- (mapcar #'(lambda (jcs)
- (mapcar #'(lambda (slotdef)
- (find-class (gethash :join-class (view-class-slot-db-info slotdef))))
- jcs))
- immediate-join-slots))
- (immediate-join-sels (mapcar #'generate-immediate-joins-selection-list sclasses))
- (sels (mapcar #'generate-selection-list sclasses))
- (fullsels (apply #'append (mapcar #'append sels immediate-join-sels)))
- (sel-tables (collect-table-refs where))
- (tables (remove-if #'null
- (remove-duplicates (append (mapcar #'table-sql-expr sclasses)
- (mapcar #'(lambda (jcs)
- (mapcan #'(lambda (jc)
- (when jc (table-sql-expr jc)))
- jcs))
- immediate-join-classes)
- sel-tables)
- :test #'tables-equal)))
- (order-by-slots (mapcar #'(lambda (ob) (if (atom ob) ob (car ob)))
- (listify order-by))))
-
+ (sclasses (mapcar #'find-class view-classes))
+ (immediate-join-slots
+ (mapcar #'(lambda (c) (generate-retrieval-joins-list c :immediate)) sclasses))
+ (immediate-join-classes
+ (mapcar #'(lambda (jcs)
+ (mapcar #'(lambda (slotdef)
+ (find-class (gethash :join-class (view-class-slot-db-info slotdef))))
+ jcs))
+ immediate-join-slots))
+ (immediate-join-sels (mapcar #'generate-immediate-joins-selection-list sclasses))
+ (sels (mapcar #'generate-selection-list sclasses))
+ (fullsels (apply #'append (mapcar #'append sels immediate-join-sels)))
+ (sel-tables (collect-table-refs where))
+ (tables (remove-if #'null
+ (remove-duplicates
+ (append (mapcar #'table-sql-expr sclasses)
+ (mapcan #'(lambda (jc-list)
+ (mapcar
+ #'(lambda (jc) (when jc (table-sql-expr jc)))
+ jc-list))
+ immediate-join-classes)
+ sel-tables)
+ :test #'tables-equal)))
+ (order-by-slots (mapcar #'(lambda (ob) (if (atom ob) ob (car ob)))
+ (listify order-by)))
+ (join-where nil))
+
+ ;;(format t "sclasses: ~W~%ijc: ~W~%tables: ~W~%" sclasses immediate-join-classes tables)
+
(dolist (ob order-by-slots)
- (when (and ob (not (member ob (mapcar #'cdr fullsels)
- :test #'ref-equal)))
- (setq fullsels
- (append fullsels (mapcar #'(lambda (att) (cons nil att))
- order-by-slots)))))
+ (when (and ob (not (member ob (mapcar #'cdr fullsels)
+ :test #'ref-equal)))
+ (setq fullsels
+ (append fullsels (mapcar #'(lambda (att) (cons nil att))
+ order-by-slots)))))
(dolist (ob (listify distinct))
- (when (and (typep ob 'sql-ident)
- (not (member ob (mapcar #'cdr fullsels)
- :test #'ref-equal)))
- (setq fullsels
- (append fullsels (mapcar #'(lambda (att) (cons nil att))
- (listify ob))))))
+ (when (and (typep ob 'sql-ident)
+ (not (member ob (mapcar #'cdr fullsels)
+ :test #'ref-equal)))
+ (setq fullsels
+ (append fullsels (mapcar #'(lambda (att) (cons nil att))
+ (listify ob))))))
(mapcar #'(lambda (vclass jclasses jslots)
- (when jclasses
- (mapcar
- #'(lambda (jclass jslot)
- (let ((dbi (view-class-slot-db-info jslot)))
- (setq where
- (append
- (list (sql-operation '==
- (sql-expression
- :attribute (gethash :foreign-key dbi)
- :table (view-table jclass))
- (sql-expression
- :attribute (gethash :home-key dbi)
- :table (view-table vclass))))
- (when where (listify where))))))
- jclasses jslots)))
- sclasses immediate-join-classes immediate-join-slots)
- (let* ((rows (apply #'select
- (append (mapcar #'cdr fullsels)
- (cons :from
- (list (append (when from (listify from))
- (listify tables))))
- (list :result-types result-types)
- (when where (list :where where))
- args)))
- (instances-to-add (- (length rows) (length instances)))
- (perhaps-extended-instances
- (if (plusp instances-to-add)
- (append instances (do ((i 0 (1+ i))
- (res nil))
- ((= i instances-to-add) res)
- (push (make-list (length sclasses) :initial-element nil) res)))
- instances))
- (objects (mapcar
- #'(lambda (row instance)
- (build-objects row sclasses immediate-join-classes sels
- immediate-join-sels database refresh flatp
- (if (and flatp (atom instance))
- (list instance)
- instance)))
- rows perhaps-extended-instances)))
- objects))))
+ (when jclasses
+ (mapcar
+ #'(lambda (jclass jslot)
+ (let ((dbi (view-class-slot-db-info jslot)))
+ (setq join-where
+ (append
+ (list (sql-operation '==
+ (sql-expression
+ :attribute (gethash :foreign-key dbi)
+ :table (view-table jclass))
+ (sql-expression
+ :attribute (gethash :home-key dbi)
+ :table (view-table vclass))))
+ (when join-where (listify join-where))))))
+ jclasses jslots)))
+ sclasses immediate-join-classes immediate-join-slots)
+ ;; Reported buggy on clsql-devel
+ ;; (when where (setq where (listify where)))
+ (cond
+ ((and where join-where)
+ (setq where (list (apply #'sql-and where join-where))))
+ ((and (null where) (> (length join-where) 1))
+ (setq where (list (apply #'sql-and join-where)))))
+
+ (let* ((rows (apply #'select
+ (append (mapcar #'cdr fullsels)
+ (cons :from
+ (list (append (when from (listify from))
+ (listify tables))))
+ (list :result-types result-types)
+ (when where
+ (list :where where))
+ args)))
+ (instances-to-add (- (length rows) (length instances)))
+ (perhaps-extended-instances
+ (if (plusp instances-to-add)
+ (append instances (do ((i 0 (1+ i))
+ (res nil))
+ ((= i instances-to-add) res)
+ (push (make-list (length sclasses) :initial-element nil) res)))
+ instances))
+ (objects (mapcar
+ #'(lambda (row instance)
+ (build-objects row sclasses immediate-join-classes sels
+ immediate-join-sels database refresh flatp
+ (if (and flatp (atom instance))
+ (list instance)
+ instance)))
+ rows perhaps-extended-instances)))
+ objects))))
(defmethod instance-refreshed ((instance standard-db-object)))
-(defun select (&rest select-all-args)
- "Executes a query on DATABASE, which has a default value of
+(defvar *default-caching* t
+ "Controls whether SELECT caches objects by default. The CommonSQL
+specification states caching is on by default.")
+
+(defun select (&rest select-all-args)
+ "Executes a query on DATABASE, which has a default value of
*DEFAULT-DATABASE*, specified by the SQL expressions supplied
using the remaining arguments in SELECT-ALL-ARGS. The SELECT
argument can be used to generate queries in both functional and
-object oriented contexts.
+object oriented contexts.
In the functional case, the required arguments specify the
columns selected by the query and may be symbolic SQL expressions
by default which means that the second value returned is a list
of strings representing the columns selected by the query. If
FIELD-NAMES is nil, the list of column names is not returned as a
-second value.
+second value.
In the object oriented case, the required arguments to SELECT are
symbols denoting View Classes which specify the database tables
for each record selected in the query, the results are returned
as elements of a list."
- (flet ((select-objects (target-args)
- (and target-args
- (every #'(lambda (arg)
- (and (symbolp arg)
- (find-class arg nil)))
- target-args))))
- (multiple-value-bind (target-args qualifier-args)
- (query-get-selections select-all-args)
- (unless (or *default-database* (getf qualifier-args :database))
- (signal-no-database-error nil))
-
- (cond
- ((select-objects target-args)
- (let ((caching (getf qualifier-args :caching t))
- (result-types (getf qualifier-args :result-types :auto))
- (refresh (getf qualifier-args :refresh nil))
- (database (or (getf qualifier-args :database) *default-database*))
- (order-by (getf qualifier-args :order-by)))
- (remf qualifier-args :caching)
- (remf qualifier-args :refresh)
- (remf qualifier-args :result-types)
-
- ;; Add explicity table name to order-by if not specified and only
- ;; one selected table. This is required so FIND-ALL won't duplicate
- ;; the field
- (when (and order-by (= 1 (length target-args)))
- (let ((table-name (view-table (find-class (car target-args))))
- (order-by-list (copy-seq (listify order-by))))
-
- (loop for i from 0 below (length order-by-list)
- do (etypecase (nth i order-by-list)
- (sql-ident-attribute
- (unless (slot-value (nth i order-by-list) 'qualifier)
- (setf (slot-value (nth i order-by-list) 'qualifier) table-name)))
- (cons
- (unless (slot-value (car (nth i order-by-list)) 'qualifier)
- (setf (slot-value (car (nth i order-by-list)) 'qualifier) table-name)))))
- (setf (getf qualifier-args :order-by) order-by-list)))
-
- (cond
- ((null caching)
- (apply #'find-all target-args
- (append qualifier-args
- (list :result-types result-types :refresh refresh))))
- (t
- (let ((cached (records-cache-results target-args qualifier-args database)))
- (cond
- ((and cached (not refresh))
- cached)
- ((and cached refresh)
- (let ((results (apply #'find-all (append (list target-args) qualifier-args `(:instances ,cached :result-types :auto :refresh ,refresh)))))
- (setf (records-cache-results target-args qualifier-args database) results)
- results))
- (t
- (let ((results (apply #'find-all target-args (append qualifier-args
- `(:result-types :auto :refresh ,refresh)))))
- (setf (records-cache-results target-args qualifier-args database) results)
- results))))))))
- (t
- (let* ((expr (apply #'make-query select-all-args))
- (specified-types
- (mapcar #'(lambda (attrib)
- (if (typep attrib 'sql-ident-attribute)
- (let ((type (slot-value attrib 'type)))
- (if type
- type
- t))
- t))
- (slot-value expr 'selections))))
- (destructuring-bind (&key (flatp nil)
- (result-types :auto)
- (field-names t)
- (database *default-database*)
- &allow-other-keys)
- qualifier-args
- (query expr :flatp flatp
- :result-types
- ;; specifying a type for an attribute overrides result-types
- (if (some #'(lambda (x) (not (eq t x))) specified-types)
- specified-types
- result-types)
- :field-names field-names
- :database database))))))))
+ (flet ((select-objects (target-args)
+ (and target-args
+ (every #'(lambda (arg)
+ (and (symbolp arg)
+ (find-class arg nil)))
+ target-args))))
+ (multiple-value-bind (target-args qualifier-args)
+ (query-get-selections select-all-args)
+ (unless (or *default-database* (getf qualifier-args :database))
+ (signal-no-database-error nil))
+
+ (cond
+ ((select-objects target-args)
+ (let ((caching (getf qualifier-args :caching *default-caching*))
+ (result-types (getf qualifier-args :result-types :auto))
+ (refresh (getf qualifier-args :refresh nil))
+ (database (or (getf qualifier-args :database) *default-database*))
+ (order-by (getf qualifier-args :order-by)))
+ (remf qualifier-args :caching)
+ (remf qualifier-args :refresh)
+ (remf qualifier-args :result-types)
+
+ ;; Add explicity table name to order-by if not specified and only
+ ;; one selected table. This is required so FIND-ALL won't duplicate
+ ;; the field
+ (when (and order-by (= 1 (length target-args)))
+ (let ((table-name (view-table (find-class (car target-args))))
+ (order-by-list (copy-seq (listify order-by))))
+
+ (loop for i from 0 below (length order-by-list)
+ do (etypecase (nth i order-by-list)
+ (sql-ident-attribute
+ (unless (slot-value (nth i order-by-list) 'qualifier)
+ (setf (slot-value (nth i order-by-list) 'qualifier) table-name)))
+ (cons
+ (unless (slot-value (car (nth i order-by-list)) 'qualifier)
+ (setf (slot-value (car (nth i order-by-list)) 'qualifier) table-name)))))
+ (setf (getf qualifier-args :order-by) order-by-list)))
+
+ (cond
+ ((null caching)
+ (apply #'find-all target-args
+ (append qualifier-args
+ (list :result-types result-types :refresh refresh))))
+ (t
+ (let ((cached (records-cache-results target-args qualifier-args database)))
+ (cond
+ ((and cached (not refresh))
+ cached)
+ ((and cached refresh)
+ (let ((results (apply #'find-all (append (list target-args) qualifier-args `(:instances ,cached :result-types :auto :refresh ,refresh)))))
+ (setf (records-cache-results target-args qualifier-args database) results)
+ results))
+ (t
+ (let ((results (apply #'find-all target-args (append qualifier-args
+ `(:result-types :auto :refresh ,refresh)))))
+ (setf (records-cache-results target-args qualifier-args database) results)
+ results))))))))
+ (t
+ (let* ((expr (apply #'make-query select-all-args))
+ (specified-types
+ (mapcar #'(lambda (attrib)
+ (if (typep attrib 'sql-ident-attribute)
+ (let ((type (slot-value attrib 'type)))
+ (if type
+ type
+ t))
+ t))
+ (slot-value expr 'selections))))
+ (destructuring-bind (&key (flatp nil)
+ (result-types :auto)
+ (field-names t)
+ (database *default-database*)
+ &allow-other-keys)
+ qualifier-args
+ (query expr :flatp flatp
+ :result-types
+ ;; specifying a type for an attribute overrides result-types
+ (if (some #'(lambda (x) (not (eq t x))) specified-types)
+ specified-types
+ result-types)
+ :field-names field-names
+ :database database))))))))
(defun compute-records-cache-key (targets qualifiers)
(list targets
- (do ((args *select-arguments* (cdr args))
- (results nil))
- ((null args) results)
- (let* ((arg (car args))
- (value (getf qualifiers arg)))
- (when value
- (push (list arg
- (typecase value
- (cons (cons (sql (car value)) (cdr value)))
- (%sql-expression (sql value))
- (t value)))
- results))))))
+ (do ((args *select-arguments* (cdr args))
+ (results nil))
+ ((null args) results)
+ (let* ((arg (car args))
+ (value (getf qualifiers arg)))
+ (when value
+ (push (list arg
+ (typecase value
+ (cons (cons (sql (car value)) (cdr value)))
+ (%sql-expression (sql value))
+ (t value)))
+ results))))))
(defun records-cache-results (targets qualifiers database)
(when (record-caches database)
- (gethash (compute-records-cache-key targets qualifiers) (record-caches database))))
+ (gethash (compute-records-cache-key targets qualifiers) (record-caches database))))
(defun (setf records-cache-results) (results targets qualifiers database)
(unless (record-caches database)
(setf (record-caches database)
- (make-hash-table :test 'equal
- #+allegro :values #+allegro :weak
+ (make-hash-table :test 'equal
+ #+allegro :values #+allegro :weak
+ #+clisp :weak #+clisp :value
#+lispworks :weak-kind #+lispworks :value)))
(setf (gethash (compute-records-cache-key targets qualifiers)
- (record-caches database)) results)
+ (record-caches database)) results)
results)
"Writes an instance to a stream where it can be later be read.
NOTE: an error will occur if a slot holds a value which can not be written readably."
(let* ((class (class-of obj))
- (alist '()))
+ (alist '()))
(dolist (slot (ordered-class-slots (class-of obj)))
(let ((name (slot-definition-name slot)))
- (when (and (not (eq 'view-database name))
- (slot-boundp obj name))
- (push (cons name (slot-value obj name)) alist))))
+ (when (and (not (eq 'view-database name))
+ (slot-boundp obj name))
+ (push (cons name (slot-value obj name)) alist))))
(setq alist (reverse alist))
(write (cons (class-name class) alist) :stream stream :readably t))
obj)
(let ((raw (read stream nil nil)))
(when raw
(let ((obj (make-instance (car raw))))
- (dolist (pair (cdr raw))
- (setf (slot-value obj (car pair)) (cdr pair)))
- obj))))
+ (dolist (pair (cdr raw))
+ (setf (slot-value obj (car pair)) (cdr pair)))
+ obj))))