#14832: Impossible to create inline objects if form validates but is unchanged
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Reporter: Julien Phalip | Owner: nobody
Type: Bug | Status: new
Component: contrib.admin | Version: 1.4
Severity: Normal | Resolution:
Keywords: sprintdec2010 | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 1
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Comment (by David):
After about 14 years after the first report (#11807) this issue is still
present.
I belive that this may be addressed with a change in the APIs in inline
admins and model-formset.
But first it must be defined a logic to handle this operation:
* **one-to-one** inline is easy, it should be created
* **many-to-one** inline is not so easy, since it depends on the
application context
* **many-to-many** inline should follow the same criteria as many-to-one
For these reasons I propose the following mechanism:
* add a new method to `InlineModelAdmin` which controls over the "create-
if-empty" mechanism, which should receive as params the main object and
count of already handled "empty" forms and which should return a boolean
(indicating if the empty form shall be created or not)
* add a new optional attribute to `BaseInlineFormSet` which is going to
hold a method like that described above
* override the `save_new_objects` in `BaseInlineFormSet` to handle the
abovementioned attribute and thus proceeding with the creation of "empty"
forms when confirmed.
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Ticket URL: <https://code.djangoproject.com/ticket/14832#comment:8>
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