#28073: RemoveField.state_forwards() crashes with AttributeError: 'NoneType'
object
has no attribute 'is_relation'
---------------------------------+------------------------------------
Reporter: Logan Gunthorpe | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.11
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 Shaun Stanworth):
I have seen and resolved this issue -- I had a migration containing a
RenameField followed by a AlterField on the same field. By moving the
RenameField to the previous migration, I was able to replay the migrations
safely.
So I think the issue is either: the application of rename states
(state_forwards) has an error, or there is an AlterField.reduce method
that tries to squash renames into an alteration.
--
Ticket URL: <https://code.djangoproject.com/ticket/28073#comment:17>
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