pythonic way to print out column conditions in database (psql)

Question

I have a nasty error with no direction when using factory boy to make fake models:

DataError: value too long for type character varying(2)

Is there a pythonic (or ruby) way to print out only the names of columns that are varchar(2) type in the database? I'd assume it's in some pgadmin3 metadata? Thank you

Answer 1

For a Postgres query, I think this does what you're looking for.

SELECT column_name FROM information_schema.columns WHERE table_name='some_table' AND data_type='varchar(2)';

This just selects all the varchar(2) columns in a specific table, but you can drop that part to get them throughout the entire database. You can also add in table_schema='some_schema' for just a certain schema in the database.

As far as a pythonic or ruby way to do it, I don't know of one, other than running that query in psycopg or some other Postgres adapter.

More info on information_schema.columns