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Code Issues 24 Releases Wiki Activity

Fix get_constraints to do multi-column indexes properly on pg

This commit is contained in:
Andrew Godwin 2013-07-02 12:06:00 +01:00
parent 9ef715d256
commit dbd3e775c1
1 changed files with 16 additions and 11 deletions
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27
django/db/backends/postgresql_psycopg2/introspection.py
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@ -177,26 +177,31 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
constraints[constraint]['columns'].add(column)
# Now get indexes
cursor.execute("""
SELECT c2.relname, attr.attname, idx.indkey, idx.indisunique, idx.indisprimary
SELECT
c2.relname,
ARRAY(
SELECT attr.attname
FROM unnest(idx.indkey) i, pg_catalog.pg_attribute attr
WHERE
attr.attnum = i AND
attr.attrelid = c.oid
),
idx.indisunique,
idx.indisprimary
FROM pg_catalog.pg_class c, pg_catalog.pg_class c2,
pg_catalog.pg_index idx, pg_catalog.pg_attribute attr
pg_catalog.pg_index idx
WHERE c.oid = idx.indrelid
AND idx.indexrelid = c2.oid
AND attr.attrelid = c.oid
AND attr.attnum = idx.indkey[0]
AND c.relname = %s
""", [table_name])
for index, column, coli, unique, primary in cursor.fetchall():
# If we're the first column, make the record
for index, columns, unique, primary in cursor.fetchall():
if index not in constraints:
constraints[index] = {
"columns": set(),
"primary_key": False,
"unique": False,
"columns": set(columns),
"primary_key": primary,
"unique": unique,
"foreign_key": False,
"check": False,
"index": True,
}
# Record the details
constraints[index]['columns'].add(column)
return constraints