How to SET CONSTRAINTS DEFERRED in sqlalchemy expression language?

Question

I have a table we\'ll call table_A which has a foreign key that references table_B. Table_B also has a foreign key that references table_A. To insert a record for table_A, I hav

Answer 1

Thanks for the suggestion @a_horse_with_no_name, but there was still a NOT NULL constraint left on the column, and the 'NOT NULL' constraint is not deferrable.