assign list elements to database entity in sqlalchemy from a list - sqlalchemy

Question

I have a simple model as follows, i have a list of games and i want all the players to assign one and only one game, from the list of games. How would i do it in sqlalchemy.
As of now i am using flask sqlalchemy, but the question does not limit to flask-sqlalchemy.
games = ['soccer', 'hockey', 'baseball', 'cricket', 'basketball']
from flask.ext.sqlalchemy import SQLAlchemy
class Gamer(db.Model):
id = db.Column(db.Integer, primary_key=True)
team_name = db.Column(db.String(80))
game_name = db.Column(db.String(80))
game = db.Column(db.String(80), i want only games from the list of games)
The analogous django functionality is found here.

Answer 1

First of all, the django functionality you refer to is not really analogous to the model you list. The reason for this is that Gamer is a model whereas SimpleForm is a UI form.
However, below are few ways you can validate the model:
1) Create a separate tabbe for Games, add the values as rows, and create a N-to-1 relationship from Gamer to the Game. This is readable, and will validate your data on both the business and DB levels
class Game(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(80))
class Gamer(db.Model):
# ...
game_id = db.Column(db.Integer, ForeignKey('game.id'))
game = relationship(Game)
2) Create and use a simple validator
from sqlalchemy.orm import validates
class Gamer(db.Model):
# ...
#validates('game')
def validate_game(self, key, address):
assert address in games
return address
edit-1: alternatively, take a look at the The Enum Recipe. But again this is on a model level, not UI validation.