Changes between Version 254 and Version 255 of BackwardsIncompatibleChanges

Timestamp:

Aug 27, 2008, 3:11:40 AM (16 years ago)

Author:

Malcolm Tredinnick

Comment:

Added note about [8618][

BackwardsIncompatibleChanges

@@ -1254 +1254 @@
  * Removed `django.core.validators`:
    * Moved `ValidationError` exception to `django.core.exceptions`.
+
+== ModelForms made more like Forms ==
+
+This is a very subtle change that will only affect people accessing formfields as attributes on a `ModelForm`. After [8618], this is no longer possible. It has never been possible on a `Form` class and was an oversight for `ModelForm`. For most people, no change is required and templates will work exactly as they did before.
+
+The code change for those affected is
+{{{
+#!python
+
+class MyForm(forms.ModelForm):
+   foo = forms.CharField(...)
+
+myform = MyForm()
+
+# Bad. Don't do this.
+myform.foo         # Previously possible on ModelForms, but only worked by accident.
+
+# Good!
+myform['foo']      # Has always worked. Works for Forms and ModelForms.
+}}}