On 18/05/2012 7:02am, oneroler wrote:
I'm trying to setup my first app and I'm trying to figure out the best
way to have constraints on a particular field (strategy for class
Division noted below). Below is the basic model structure. What I
would like is for the strategy under a Division to be constrained to
the strategies selected for the Business. A business may have many
strategies, but a division will only have one (but it should only be
one selected for the business). Any help on this would be
appreciated. Thanks, Sam
class Strategy(models.Model):
name = models.CharField(max_length=200)
#name would be something like retail, wholesale, etc
class Business(models.Model):
name = models.CharField()
strategy = models.ManyToManyField(Strategy)
class Division(models.Model):
business = models.ForeignKey(Business)
name = models.CharField()
strategy = ???
Try ...
strategy = models.ForeignKey(Strategy)
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