#31064: Migration doesn't detect precision changes in fields that ManyToMany 
points
to.
-----------------------------+------------------------------------
     Reporter:  zapililirad  |                    Owner:  Dart
         Type:  Bug          |                   Status:  assigned
    Component:  Migrations   |                  Version:  master
     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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Changes (by Simon Charette):

 * cc: Simon Charette (added)


Comment:

 That makes sense, good old model level cache biting us again. If
 `related_objects` gets out of sync it's likely because we forgot to clear
 something in `AlterField.state_forwards` and my money is on
 `is_referenced_by_foreign_key` not taking into account `ManyToManyField`
 defined without an explicit `through`.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/31064#comment:6>
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