CODEWITHSUNDEEP
pythondjangopolymorphism
Christiaan Maks
Christiaan Maks

Reputation: 3778

Django polymorphism in view

I have the following model, using Django Polymorphic:

class Connection(models.Model):
    input = BaseInput()

class BaseInput(PolymorphicModel):
    pass

class ChildInput(BaseInput):
    name = 'child'

Using the python console, doing BaseInput.objects.all() resolves nicely to ChildInput automatically due to Django Polymorphic.

But in the view, the .html file, I use a for loop through Connection.objects.all() (given in the context). If I then try to access the ChildInput object like so:

c.input

(where c is the connection in the for loop) it resolves to 'BaseInput object'.

So Polymorphic works in the python interpreter but not the view.

Any ideas?

(Python 3.4.1, Django 1.7.3, Django-polymorphic 0.6.1)

Upvotes: 2

Views: 329

Answers (1)

knbk
knbk

Reputation: 53669

class Connection(models.Model):
    input = BaseInput()

You need to change input to models.ForeignKey(BaseInput). This way, input is added as a database field on the Connection model, and not just as an attribute on the class.

Upvotes: 1

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