Guard against already converted values in read-sql-value

[clsql.git] / sql / oodml.lisp

diff --git a/sql/oodml.lisp b/sql/oodml.lisp
index 8eec40e98fed5840c6aa487108d81904324c2a43..2a5b0510b849d5e92c84b626b110630588fc1c35 100644 (file)
--- a/sql/oodml.lisp
+++ b/sql/oodml.lisp
@@ -473,8 +473,12 @@
     (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))