#23331: Circular dependencies are not resolved by new Migrate framework
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Reporter: aidanlister | Owner: andrewgodwin
Type: Bug | Status: new
Component: Migrations | Version: master
Severity: Normal | Resolution:
Keywords: migrate | Triage Stage: Unreviewed
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 aidanlister):
* needs_better_patch: => 0
* needs_tests: => 0
* needs_docs: => 0
Old description:
New description:
It's very easy and not explicitly not-supported to create circular
dependencies in your apps. I have attached a test project which has two
circular dependency resolution failures.
This fails to create migrations:
./manage.py makemigrations contractors inspections organisations
properties reports tasks timeline
This creates the migrations:
./manage.py makemigrations properties reports tasks timeline
./manage.py makemigrations contractors inspections
But then ./manage.py migrate fails:
django.db.migrations.graph.CircularDependencyError: [('contractors',
u'0002_auto_20140821_0156'), ('reports', u'0001_initial'), ('inspections',
u'0001_initial'), ('contractors', u'0002_auto_20140821_0156')]
I have tried manually breaking up the migrations into lots of little
steps, but you'll have the same problem with the reports and inspections
app. Even with lots of tiny migrations it eventually loops around.
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Ticket URL: <https://code.djangoproject.com/ticket/23331#comment:1>
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