Re: How to add an element of derived data to a Django model?

I think you're looking for something like this on a model:

@property

def is_bigger(self):

    return self.a > self.b

-A

On Sat, Jan 5, 2013 at 9:16 AM, Babatunde Akinyanmi <tundebabzy@gmail.com> wrote:

I think you can write a function that returns a > b and then make it a
getter method with python's property.

i would have given an example but typing code from my phone isn't very
appealing.

Sent from my Windows Phone

-----Original Message-----
From: Saqib Ali
Sent: 1/5/2013 5:50 PM
To: django-users@googlegroups.com
Subject: How to add an element of derived data to a Django model?




I have a Django Model as follows:





class myModel(models.Model):


 a = models.IntegerField()


 b = models.IntegerField()




I want to add a models.BooleanField() named c to the myModel class.
However the value of c is simply derived from a and b so I don't want
it to be stored in the Database.

I want to c to be True if a > b, otherwise False. I want c to reflect
the correct/current value even when a and b get modifed. And I want to
be able to access c using myModel.c just like I can access a and b.




Is there any way to do this?

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