如何使Django sqlclear输出CASCADE用于依赖关系

Question

I have a number of models containing foreign keys and many to many (m2m) relationships in a Django project. When I try and use the sqlclear command from manage.py i receive the error:

ERROR:  cannot drop table appname_tablename because other objects depend on it

Is there a way to have Django add CASCADE to the output so dependent tables can be dropped?

Answer 1

Why not use sed ?

>>> ./manage.py sqlclear testapp | sed 's/";/" CASCADE;/' 
BEGIN;
DROP TABLE "testapp_person" CASCADE;
DROP TABLE "testapp_post" CASCADE;
DROP TABLE "testapp_userprofile" CASCADE;
DROP TABLE "testapp_school" CASCADE;
DROP TABLE "testapp_events" CASCADE;
DROP TABLE "testapp_uploadmodel" CASCADE;
COMMIT;

Answer 2

You can execute resulting DROP TABLE script several times until all tables will be dropped. Is this a problem for you?

EDITED

You can overwrite sql_delete in django.core.management.sql with:

...
if cursor and table_name_converter(model._meta.db_table) in table_names: 
    # Drop the table now 
    output.append('%s %s %s;' % (style.SQL_KEYWORD('DROP TABLE IF EXISTS'), #<-!
                                 style.SQL_TABLE(qn(model._meta.db_table)),
                                 style.SQL_KEYWORD('CASCADE')))    #<-!
...