replaceafill@system76:~/sandboxes/flourish$ bzr diff
=== modified file 'src/schooltool/schoolyear/browser/schoolyear.py'
--- src/schooltool/schoolyear/browser/schoolyear.py	2011-11-21 19:30:28 +0000
+++ src/schooltool/schoolyear/browser/schoolyear.py	2012-01-10 20:49:53 +0000
@@ -44,6 +44,7 @@
 from zope.security.checker import canAccess

 from z3c.form import form, field, button
+from z3c.form.interfaces import IDataConverter
 from z3c.form.util import getSpecification
 from z3c.form.validator import NoInputData
 from z3c.form.validator import WidgetsValidatorDiscriminators
@@ -627,9 +628,11 @@
         # XXX: hack to display the overlap error next to the widget!
         rv = super(FlourishOverlapValidator, self).validate(value)
         last_widget = self.view.widgets['last']
+        last_field = last_widget.field
         last_value = self.request.get(last_widget.name)
+        converter = getMultiAdapter((last_field, last_widget), IDataConverter)
         try:
-            last_value = last_widget._toFieldValue(last_value)
+            last_value = converter.toFieldValue(last_value)
         except:
             return
         try:

=== modified file 'src/schooltool/term/browser/term.py'
--- src/schooltool/term/browser/term.py	2011-11-21 10:32:13 +0000
+++ src/schooltool/term/browser/term.py	2012-01-10 20:53:48 +0000
@@ -22,7 +22,7 @@
 import datetime
 import itertools

-from zope.component import adapts
+from zope.component import adapts, getMultiAdapter
 from zope.interface.exceptions import Invalid
 from zope.interface import implements
 from zope.interface import Interface
@@ -35,6 +35,7 @@
 from zope.security.checker import canAccess
 from zope.traversing.browser.absoluteurl import absoluteURL

+from z3c.form.interfaces import IDataConverter
 from z3c.form.util import getSpecification
 from z3c.form.validator import NoInputData
 from z3c.form.validator import WidgetsValidatorDiscriminators
@@ -511,9 +512,11 @@
         # XXX: hack to display the overlap error next to the widget!
         super(FlourishOverlapValidator, self).validate(value)
         last_widget = self.view.widgets['last']
+        last_field = last_widget.field
         last_value = self.request.get(last_widget.name)
+        converter = getMultiAdapter((last_field, last_widget), IDataConverter)
         try:
-            last_value = last_widget._toFieldValue(last_value)
+            last_value = converter.toFieldValue(last_value)
         except:
             return
         try:

replaceafill@system76:~/sandboxes/flourish$