Changes between Version 141 and Version 142 of BackwardsIncompatibleChanges

Timestamp:

Dec 12, 2007, 8:48:43 PM (17 years ago)

Author:

jkocherhans

Comment:

Added note about #6162.

BackwardsIncompatibleChanges

@@ -48 +48 @@
  * [6833] Dec 2, 2007: [#Genericviewsemptydefaults Generic views' empty defaults]
  * [6838] Dec. 3, 2007: [#MultipleObjectsReturnedexceptioninsteadofAssertionError MultipleObjectsReturned exception instead of AssertionError]
+ * [6915] Dec 12, 2007 [#ModelFormsconstructornowmatchesForms ModelForm's constructor now matches Form's]
 
 == Database constraint names changed ==
@@ -509 +510 @@
     ...
 }}}
+
+== !ModelForm's constructor now matches Form's ==
+
+{{{instance}}} was moved from the first argument in {{{ModelForm}}}'s {{{__init__}}} method to the last. Also, {{{ModelForm}}} will instantiate a new model object if you don't give it an instance. The model it generates is specified by the {{{ModelForm}}}'s inner {{{Meta}}} classes {{{model}}} attribute. See #6162 for details.
+
+Before:
+{{{
+#!python
+# for add forms
+obj = MyObj()
+form = MyForm(obj)
+
+# for change forms
+obj = MyObj.objects.get(pk=1)
+form = MyForm(obj)
+}}}
+
+After:
+{{{
+#!python
+# for add forms
+form = MyForm()
+
+# for change forms
+obj = MyObj.objects.get(pk=1)
+form = MyForm(instance=obj)
+}}}