Opened 10 years ago

Last modified 10 years ago

#24348 closed New feature

Allow to pass on initial data to change form for existing objects (again). — at Initial Version

Reported by: slachinger Owned by: nobody
Component: contrib.admin Version: 1.7
Severity: Normal Keywords:
Cc: simon.lachinger@… Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

The szenario is to redirect the user to the change_view to review changes to an existing object bevore saving. For this the data for the changed fields needs to be passed on via GET-Parameters. This still works for "add" but no longer works for "change".

This worked/existed until 1.6 but no longer works in 1.7. I suspect this is related to the introduction of ModelAdmin.get_changeform_initial_data() method and the cleanup/optimization that came with it.

Based on the code from 1.7.2 in django/contrib/admin/options.py:1414-1420:

Maybe call self.get_changeform_initial_data(request) for both change and add and pass on the object (or none for add)?

Code highlighting: 

          if add:
              initial = self.get_changeform_initial_data(request, obj=None) # <- /add so obj=None
              form = ModelForm(initial=initial)
              formsets, inline_instances = self._create_formsets(request, self.model(), change=False)
          else:
              initial = self.get_changeform_initial_data(request, obj=obj) # <- maybe add this line?
              form = ModelForm(instance=obj)
              formsets, inline_instances = self._create_formsets(request, obj, change=True)

The change in the method signature might break code overriding get_changeform_initial_data() though.

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