app/django/db/backends/postgresql_psycopg2/introspection.py
author Sverre Rabbelier <srabbelier@gmail.com>
Wed, 11 Feb 2009 23:59:41 +0000
changeset 1274 5f87d9807b77
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Rename TinyMCE to FullTinyMCE and add TinyMCE widget The FullTinyMCE (irony intended) is the full-fledged editor, usefull in editing documents etc. The regular TinyMCE widget can be used for smaller tasks that allow HTML input (such as the description field). Patch by: Sverre Rabbelier

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