I am a beginner of Flask, I am reading the book Flask Web Development.
My question is why we do not need __init__ to initialize the following classes in models.py
Example 5-2. hello.py: Role and User model definition
class Role(db.Model):
__tablename__ = 'roles'
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(64), unique=True)
def __repr__(self):
return '<Role {name}>'.format(self.name)
class User(db.Model):
__tablename__ = 'users'
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(64), unique=True, index=True)
def __repr__(self):
return '<User {username}>'.format(self.username)
>>> from hello import Role, User
>>> admin_role = Role(name='Admin')
>>> user_john = User(username='john')
