[gen] Ensure the tool can't be deleted. [gen] Wrapper.sort can now sort according to param field.insert if sortKey is None.

fields/ref.py

@@ -1020,7 +1020,7 @@ class Ref(Field):
         '''This method links p_value (which can be a list of objects) to p_obj
            through this Ref field. When linking 2 objects via a Ref,
            p_linkObject must be called twice: once on the forward Ref and once
-           on the backward ref. p_back indicates if we are calling it on the
+           on the backward Ref. p_back indicates if we are calling it on the
            forward or backward Ref. If p_noSecurity is True, we bypass security
            checks (has the logged user the right to modify this Ref field?).
            If p_executeMethods is False, we do not execute methods that
@@ -1040,7 +1040,7 @@ class Ref(Field):
         if refs == None:
             refs = zobj.getProductConfig().PersistentList()
             setattr(zobj, self.name, refs)
-        # Insert p_value into it.
+        # Insert p_value into it
         uid = value.o.id
         if uid in refs: return
         # Execute self.beforeLink if present

gen/wrappers/ToolWrapper.py

@@ -767,4 +767,8 @@ class ToolWrapper(AbstractWrapper):
         '''Show this button only if a LDAP connection exists and is enabled.'''
         cfg = self.o.getProductConfig(True).ldap
         if cfg and cfg.enabled: return 'view'
+
+    def mayDelete(self):
+        '''No one can delete the tool.'''
+        return
 # ------------------------------------------------------------------------------

gen/wrappers/UserWrapper.py

@@ -276,7 +276,7 @@ class UserWrapper(AbstractWrapper):
     def mayDelete(self):
         '''No one can delete users "system", "anon" and "admin".'''
         if self.o.id in self.specialUsers: return
-        # Call custom "mayDelete" when present.
+        # Call custom "mayDelete" when present
         custom = self._getCustomMethod('mayDelete')
         if custom: return self._callCustom('mayDelete')
         return True
@@ -292,7 +292,7 @@ class UserWrapper(AbstractWrapper):
            (for local users only).'''
         if self.source == 'zodb': del self.o.acl_users.data[self.login]
         self.log('user %s deleted.' % self.login)
-        # Call a custom "onDelete" if any.
+        # Call a custom "onDelete" if any
         return self._callCustom('onDelete')
 
     def getLogins(self, groupsOnly=False):

gen/wrappers/__init__.py

@@ -850,15 +850,27 @@ class AbstractWrapper(object):
     def sort(self, fieldName, sortKey='title', reverse=False):
         '''Sorts referred elements linked to p_self via p_fieldName according
            to a given p_sortKey which must be an attribute set on referred
-           objects ("title", by default).'''
+           objects ("title", by default) or None. If None, default sorting will
+           occur, using the method stored in field.insert.'''
         refs = getattr(self.o, fieldName, None)
         if not refs: return
         tool = self.tool
-        # refs is a PersistentList: param "key" is not available. So perform the
+        # refs is a PersistentList: param "key" is not available for method
-        # sort on the real list and then indicate that the persistent list has
+        # "sort". So perform the sort on the real list and then indicate that
-        # changed (the ZODB way).
+        # the persistent list has changed (the ZODB way).
-        refs.data.sort(key=lambda x: getattr(tool.getObject(x), sortKey),
+        if not sortKey:
-                       reverse=reverse)
+            # Sort according to field.insert
+            field = self.getField(fieldName)
+            insertMethod = field.insert
+            if not insertMethod:
+                raise Exception('Param "insert" for Ref field %s is None.' % \
+                                fieldName)
+            if not callable(insertMethod): insertMethod = insertMethod[1]
+            keyMethod = lambda uid: insertMethod(self, tool.getObject(uid))
+        else:
+            # Sort according to p_sortKey
+            keyMethod = lambda uid: getattr(tool.getObject(uid), sortKey)
+        refs.data.sort(key=keyMethod, reverse=reverse)
         refs._p_changed = 1
 
     def create(self, fieldNameOrClass, noSecurity=False,