Select NULL Values in SQLAlchemy

Question

Here\'s my (PostgreSQL) table --

test=> create table people (name varchar primary key,
                            marriage_status varchar) ; 

test=>          


        

Answer 1

Since SQLAlchemy 0.7.9 you may use the is_ method of the column.

A filter expression like:

filter(or_(people.marriage_status!='married', people.marriage_status.is_(None)))

will generate the parameterized SQL:

WHERE people.marriage_status != %(status_1)s OR people.marriage_status IS NULL