Using Sum() for a models method inside a Query

[Jorge Andrés Vergara Ebratt]

Hello everyone,

Well, the tittle says it all:

I have a model X

class X(models.Model)
    a = models.IntegerField()
    b = models.IntegerField()

def getC(self):
    return a + b


So, when I'm inside a template I can call {{x.getC}} and it gets the method
for the current instance it's in, but how can I get the Sum, or Avg of that
method? I tried doing Sum('getC') but I get the error because getC isn't
callable in the query...

Thanks in advance for the help

-- 
*Jorge Andres Vergara Ebratt*
*#SoftwareDeveloper (Or at least trying to be)*
*@javebratt*
*facebook.com/javebratt <http://facebook.com/javebratt>*

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