[migration] fix 3.10 migration: since cw_source is marked as meta relation, it has not been automatically added to all existant entity type
for eschema in schema.entities():
if not 'cw_source' in eschema.subjrels:
add_relation_def(eschema, 'cw_source', 'CWSource')
sql('INSERT INTO cw_source_relation(eid_from, eid_to) '
'SELECT e.eid,s.cw_eid FROM entities as e, cw_CWSource as s '
'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)')
commit()