app/django/db/backends/postgresql_psycopg2/introspection.py
author Lennard de Rijk <ljvderijk@gmail.com>
Fri, 30 Jan 2009 09:31:56 +0000
changeset 1076 063194eaf87b
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Added agreed_to_tos_on field in user and role model. Also the user and user_self view no properly handle this new field. The ToS will be shown on-screen (not in a nice way) only if it is in effect and a user has not signed it yet. Patch by: Lennard de Rijk Reviewed by: to-be-reviewed

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