1 for eschema in schema.entities():

     2     if not 'cw_source' in eschema.subjrels:

     3         add_relation_def(eschema, 'cw_source', 'CWSource')

     4 

     5 sql('INSERT INTO cw_source_relation(eid_from, eid_to) '

     6     'SELECT e.eid,s.cw_eid FROM entities as e, cw_CWSource as s '

     7     'WHERE s.cw_name=e.type AND NOT EXISTS(SELECT 1 FROM cw_source_relation WHERE eid_from=e.eid AND eid_to=s.cw_eid)')

     8 commit()