app/django/db/backends/postgresql_psycopg2/introspection.py
author Lennard de Rijk <ljvderijk@gmail.com>
Sun, 27 Sep 2009 17:46:43 +0200
changeset 2979 ba4aeaaad0a1
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Fixed GHOP Task Logic's updateEntityProperties. This method now properly calls the supermethod and also uses the right keyword argument (silent instead of siltent).

from django.db.backends.postgresql.introspection import DatabaseIntrospection as PostgresDatabaseIntrospection

class DatabaseIntrospection(PostgresDatabaseIntrospection):

    def get_relations(self, cursor, table_name):
        """
        Returns a dictionary of {field_index: (field_index_other_table, other_table)}
        representing all relationships to the given table. Indexes are 0-based.
        """
        cursor.execute("""
            SELECT con.conkey, con.confkey, c2.relname
            FROM pg_constraint con, pg_class c1, pg_class c2
            WHERE c1.oid = con.conrelid
                AND c2.oid = con.confrelid
                AND c1.relname = %s
                AND con.contype = 'f'""", [table_name])
        relations = {}
        for row in cursor.fetchall():
            # row[0] and row[1] are single-item lists, so grab the single item.
            relations[row[0][0] - 1] = (row[1][0] - 1, row[2])
        return relations