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migrations_tests.py 2.2KB

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  1. """This module was taken from Wagtail, see:
  2. https://github.com/torchbox/wagtail/blob/d82e38e11e9f6c27b6ad6dfc6467e2754b5ab228/wagtail/wagtailcore/tests/test_migrations.py
  3. """
  4. from __future__ import absolute_import
  5. from django.apps import apps
  6. from django.db.migrations.autodetector import MigrationAutodetector
  7. from django.db.migrations.loader import MigrationLoader
  8. from django.db.migrations.questioner import MigrationQuestioner
  9. from django.db.migrations.state import ProjectState
  10. from django.test import TransactionTestCase
  11. from django.utils.six import iteritems
  12. class TestForMigrations(TransactionTestCase):
  13. def test__migrations(self):
  14. app_labels = set(app.label for app in apps.get_app_configs()
  15. if app.name.startswith('oscar.'))
  16. for app_label in app_labels:
  17. apps.get_app_config(app_label.split('.')[-1])
  18. loader = MigrationLoader(None, ignore_no_migrations=True)
  19. conflicts = dict(
  20. (app_label, conflict)
  21. for app_label, conflict in iteritems(loader.detect_conflicts())
  22. if app_label in app_labels
  23. )
  24. if conflicts:
  25. name_str = "; ".join("%s in %s" % (", ".join(names), app)
  26. for app, names in conflicts.items())
  27. self.fail("Conflicting migrations detected (%s)." % name_str)
  28. autodetector = MigrationAutodetector(
  29. loader.project_state(),
  30. ProjectState.from_apps(apps),
  31. MigrationQuestioner(specified_apps=app_labels, dry_run=True),
  32. )
  33. changes = autodetector.changes(
  34. graph=loader.graph,
  35. trim_to_apps=app_labels or None,
  36. convert_apps=app_labels or None,
  37. )
  38. if changes:
  39. migrations = '\n'.join((
  40. ' {migration}\n{changes}'.format(
  41. migration=migration,
  42. changes='\n'.join(' {0}'.format(operation.describe())
  43. for operation in migration.operations))
  44. for (_, migrations) in changes.items()
  45. for migration in migrations))
  46. self.fail('Model changes with no migrations detected:\n%s' % migrations)