Update get_constraints with better comments (77028194) · Commits · Dom Sekotill / django

django/db/backends/init.py

+14 −3

Original line number	Diff line number	Diff line
		@@ -1328,9 +1328,20 @@ class BaseDatabaseIntrospection(object):

		def get_constraints(self, cursor, table_name):
		"""
		Returns {'cnname': {'columns': set(columns), 'primary_key': bool, 'unique': bool}}

		Both single- and multi-column constraints are introspected.
		Retrieves any constraints or keys (unique, pk, fk, check, index)
		across one or more columns.

		Returns a dict mapping constraint names to their attributes,
		where attributes is a dict with keys:
		* columns: List of columns this covers
		* primary_key: True if primary key, False otherwise
		* unique: True if this is a unique constraint, False otherwise
		* foreign_key: (table, column) of target, or None
		* check: True if check constraint, False otherwise
		* index: True if index, False otherwise.

		Some backends may return special constraint names that don't exist
		if they don't name constraints of a certain type (e.g. SQLite)
		"""
		raise NotImplementedError

+2 −2

Original line number	Diff line number	Diff line
		@@ -169,7 +169,7 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
		"columns": [],
		"primary_key": False,
		"unique": False,
		"foreign_key": False,
		"foreign_key": None,
		"check": True,
		"index": False,
		}
		@@ -197,7 +197,7 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
		"columns": list(columns),
		"primary_key": primary,
		"unique": unique,
		"foreign_key": False,
		"foreign_key": None,
		"check": False,
		"index": True,
		}