CODEWITHSUNDEEP
djangodjango-models
David J.
David J.

Reputation: 1913

using model method to instantiate object in Django

I have two classes defined like so in my models.py file:

class Branch_Circle(models.Model):
    ...
    trunk_circle = models.ForeignKey('Trunk_Circle', null=True)

class Trunk_Circle(models.Model):
    ...
    def create_branch_circle(self):
        branch_circle = Branch_Circle(trunk_circle=self)
        branch_circle.save()
        return branch_circle

Using shell I instantiate a Trunk_Circle object first, then call its 'create_branch_circle' method and expect it to create a Branch_Circle object. It doesn't:

import Trunk_Circle
import Branch_Circle

r = Trunk_Circle
s = r.create_branch_circle

When I call Branch_Circle.objects.all() it is empty. Also, the type of 's' is <bound method Trunk_Circle.create_branch_circle of <Trunk_Circle: Trunk_Circle object>>

Upvotes: 1

Views: 59

Answers (1)

Leistungsabfall
Leistungsabfall

Reputation: 6488

To instantiate an object or call a method you have to use brackets ():

r = Trunk_Circle()
s = r.create_branch_circle()

Upvotes: 2

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