added a validator to make sure we do not have 2 currencies with the same reference

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5372 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Currency_view/my_reference.xml

@@ -22,7 +22,7 @@
               <dictionary>
                 <item>
                     <key> <string>external_validator_failed</string> </key>
-                    <value> <string>The input failed the external validator.</string> </value>
+                    <value> <string>Another currency already exists for this currency code.</string> </value>
                 </item>
                 <item>
                     <key> <string>required_not_found</string> </key>
@@ -223,7 +223,9 @@
                 </item>
                 <item>
                     <key> <string>external_validator</string> </key>
-                    <value> <string></string> </value>
+                    <value>
+                      <persistent> <string encoding="base64">AAAAAAAAAAI=</string> </persistent>
+                    </value>
                 </item>
                 <item>
                     <key> <string>extra</string> </key>
@@ -263,4 +265,23 @@
       </dictionary>
     </pickle>
   </record>
+  <record id="2" aka="AAAAAAAAAAI=">
+    <pickle>
+      <tuple>
+        <tuple>
+          <string>Products.Formulator.MethodField</string>
+          <string>Method</string>
+        </tuple>
+        <none/>
+      </tuple>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>method_name</string> </key>
+            <value> <string>Base_uniqueReferenceInFolderValidator</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
 </ZopeData>