I am writing an app that has multiple classes that function as Users (for example, a School Account and a Staff account). I'm trying to use Flask-Login to make this easy but I'm not quite sure how to make it, so that when a user logs in I can have my app check to see whether or not the username belongs to a School account or Staff account, and then log in appropriately.
I know how to figure out which type of account it belongs to (since all usernames must be unique). But after that I'm not sure how to tell the app that I want it to login that specific user.
Right now, I only have one universal login page. Is it easier if I make separate login pages for Staff accounts and School accounts? I'm using a MySQL database through Flask-SQLAlchemy.
You can define each User with a specific role. For example, user 'x' can be SCHOOL while user 'y' can be 'STAFF'.
class User(db.Model): __tablename__ = 'User' id = db.Column(db.Integer,primary_key=True) username = db.Column(db.String(80),unique=True) pwd_hash = db.Column(db.String(200)) email = db.Column(db.String(256),unique=True) is_active = db.Column(db.Boolean,default=False) urole = db.Column(db.String(80)) def __init__(self,username,pwd_hash,email,is_active,urole): self.username = username self.pwd_hash = pwd_hash self.email = email self.is_active = is_active self.urole = urole def get_id(self): return self.id def is_active(self): return self.is_active def activate_user(self): self.is_active = True def get_username(self): return self.username def get_urole(self): return self.urole
Flask-login however does not have the concept of user roles yet and I wrote my own version of login_required decorator to override that. So you might want to use something like:
def login_required(role="ANY"): def wrapper(fn): @wraps(fn) def decorated_view(*args, **kwargs): if not current_user.is_authenticated(): return current_app.login_manager.unauthorized() urole = current_app.login_manager.reload_user().get_urole() if ( (urole != role) and (role != "ANY")): return current_app.login_manager.unauthorized() return fn(*args, **kwargs) return decorated_view return wrapper
Then, you can use this decorator on a view function like:
@app.route('/school/') @login_required(role="SCHOOL") def restricted_view_for_school(): pass
@codegeek i found this very useful, thanks. I had to modify the code a bit to get it working for me, so i figured i'd drop it here in case it can help anyone else:
from functools import wraps login_manager = LoginManager() ... def login_required(role="ANY"): def wrapper(fn): @wraps(fn) def decorated_view(*args, **kwargs): if not current_user.is_authenticated(): return login_manager.unauthorized() if ((current_user.role != role) and (role != "ANY")): return login_manager.unauthorized() return fn(*args, **kwargs) return decorated_view return wrapper