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Code Issues 32 Releases Wiki Activity

[1.7.x] Fixed #24135 -- Made RenameModel rename many-to-many tables.

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Thanks Simon and Markus for reviews.

Backport of 28db4af80a from master
This commit is contained in:
Tim Graham
2015-01-15 09:56:07 -05:00
parent b419bd3843
commit 065b2a82f6
3 changed files with 50 additions and 0 deletions
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21
django/db/migrations/operations/models.py
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@@ -171,6 +171,27 @@ class RenameModel(Operation):
related_object.field,
to_field,
)
# Rename M2M fields whose name is based on this model's name.
fields = zip(old_model._meta.local_many_to_many, new_model._meta.local_many_to_many)
for (old_field, new_field) in fields:
# Skip self-referential fields as these are renamed above.
if new_field.model == new_field.related.parent_model or not new_field.rel.through._meta.auto_created:
continue
# Rename the M2M table that's based on this model's name.
old_m2m_model = old_field.rel.through
new_m2m_model = new_field.rel.through
schema_editor.alter_db_table(
new_m2m_model,
old_m2m_model._meta.db_table,
new_m2m_model._meta.db_table,
)
# Rename the column in the M2M table that's based on this
# model's name.
schema_editor.alter_field(
new_m2m_model,
old_m2m_model._meta.get_field(old_model._meta.model_name),
new_m2m_model._meta.get_field(new_model._meta.model_name),
)
def database_backwards(self, app_label, schema_editor, from_state, to_state):
self.new_name, self.old_name = self.old_name, self.new_name