Question

I’m new to sqlalchemy, and I’m trying to achieve simple validation of model’s fields, as provided by Django ORM (min & max for Integer, email, …).
Can SQLAlchemy do this sort of field validations out of the box ?
By the way, I’m using SQLAlchemy with Flask.

Answer 1

See Simple Validators in the documentation. Sample code extract below:

class EmailAddress(Base):
    __tablename__ = 'address'

    id = Column(Integer, primary_key=True)
    email = Column(String)

    @validates('email')
    def validate_email(self, key, address):
        assert '@' in address
        return address