Starting with the first point, we will need to add a new dependency method, get, which returns the user, given the email, if it exists.
First, add a new exception class in users.py:
class UserNotFound(Exception):
pass
This is what we will raise in the event of the user not being found. Now we will update our imports to include the following:
from sqlalchemy.orm.exc import NoResultFound
NoResultFound, as the name implies, is raised by SQLAlchemy when a requested object is not found in the database. Now we can add a new method to our UserWrapper class:
def get(self, email): query = self.session.query(User) # ① try: user = query.filter_by(email=email).one() # ② except NoResultFound: message = 'User not found ...
