#28043: Cloning a ModelState fails to deepcopy all options
-------------------------------------+-------------------------------------
Reporter: Ian Foote | Owner: nobody
Type: Bug | Status: new
Component: | Version: master
Migrations |
Severity: Release | Keywords: ModelState clone
blocker | indexes
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
In
[https://github.com/django/django/blob/351835f26234cade43f0bed45441fc144c33a785/django/db/migrations/state.py#L548
ModelState.clone], we copy the {{{self.options}}} dictionary, but this
fails to copy any mutable values, specifically {{{indexes}}}. Since
{{{AddIndex.state_forwards}}} mutates {{{indexes}}}, this leads to an
invalid state.
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Ticket URL: <https://code.djangoproject.com/ticket/28043>
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