#25129: Migration crash on ForeignKey with a callable default that returns a
model
instance
----------------------------+------------------------------------
Reporter: timgraham | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.8
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by charettes):
Since no arguments are passed to the default value callable we've got two
options:
1. Document that foreign key callable defaults must return the value of
the field they reference (`pk` unless `to_field` is set).
2. Change the check in `ForeignKey.get_default()` to
`instance(field_default, models.Model) and field_default._meta.label ==
self.remote_field.model._meta.label`.
I'd favor the first option.
--
Ticket URL: <https://code.djangoproject.com/ticket/25129#comment:1>
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