SQLAlchemy filter_by json column

Question

I have model like this:

class Customer(Base):
__tablename__ = 'customers'
uuid = database.Column(database.String, primary_key=True)
activity_type = database.Column(database.String)
activity = database.Column(database.JSON)

I need to filter_by activity_type and also activity like this:

@staticmethod
def create_if_not_exist(customer):
    """ Create customer if not exists """
    if Customer.query.filter_by(
            activity_type=customer.activity_type,
            activity=customer.activity
    ).first() is None:
        customer.save()

    return customer.uuid

If doesnt work for json colum activity. Can someone help me how to filter_by json column ?

Answer 1

One PostgreSQL specific solution to this is to utilize PostgreSQLs JSONB column:

from sqlalchemy.dialects.postgresql import JSONB

class Customer(Base):
    __tablename__ = 'customers'
    uuid = database.Column(database.String, primary_key=True)
    activity_type = database.Column(database.String)
    activity = database.Column(JSONB)

Your original query should then evaluate properly.