app/django/db/backends/postgresql_psycopg2/introspection.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Mon, 17 Nov 2008 22:21:02 +0000
changeset 502 e1e24c0a4e82
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Add new parameters to views: url_name which is name used in urls (instead of using lower entity names) and module_name which is used for constructing django urls. Append changes to all affected files. Fix some title names. Change urls that included underscores like "site_settings" into urls with slash "site/settings". Plus some other minor fixes. Patch by: Pawel Solyga

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