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[1.8.x] Fixed #24893 -- Fixed lack of unique constraint when changing a field from primary_key=True to unique=True

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Backport of e1e6399c2c from master
This commit is contained in:
Tim Graham
2015-06-01 19:27:28 -04:00
parent 8911d2e20f
commit 1c57d7e7fa
4 changed files with 46 additions and 1 deletions
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4
django/db/backends/base/schema.py
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@@ -659,7 +659,9 @@ class BaseDatabaseSchemaEditor(object):
for sql, params in post_actions:
self.execute(sql, params)
# Added a unique?
if not old_field.unique and new_field.unique:
if (not old_field.unique and new_field.unique) or (
old_field.primary_key and not new_field.primary_key and new_field.unique
):
self.execute(self._create_unique_sql(model, [new_field.column]))
# Added an index?
if (not old_field.db_index and new_field.db_index and