Django form for a model create object of another model

Question

Is there anyway to create an object of another model instance in a django form for a specified model? For instance when you'll add a new user using django admin you have the options to create another group ou add the user to an existing one.

@Edit I will try to clarify better with another example ... I have a product form, to add a new product, the user can choose which category it belongs, but if there is no such category, it will have to create the corresponding category. And then add this product to new category and save the new product.

It's hard to follow. Can you explain in other words or bring abother example? — vishes_shell, Mar 03 '16 at 18:40

score 1 · Accepted Answer · answered Mar 03 '16 at 19:00

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if form.is_valid():
    c = form.cleaned_data["category"]
    category = Category.objects.filter(name=c).first()
    if not category:
        category = Category.objects.create(name=c)
    product = form.save(commit=False)
    product.category = category
    product.save()

You could also consider using a pre_save signal to create the category object. But this is much simpler and easy to maintain.

answered Mar 03 '16 at 19:00

karthikr

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Thanks. This helped me a lot. – Rodrigo Valente Mar 04 '16 at 12:16

score 0 · Answer 2 · edited May 23 '17 at 11:50

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I was able to achieve what a I wanted using karthikr answer and also this thread on stackoverflow Django form with choices but also with freetext option?

edited May 23 '17 at 11:50

Community

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answered Mar 04 '16 at 12:17

Rodrigo Valente

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Django form for a model create object of another model

2 Answers2