CODEWITHSUNDEEP
djangodjango-modelsdjango-forms
Indika Rajapaksha
Indika Rajapaksha

Reputation: 1168

Django foreign key with different model field values

I want to create a foreign key relationship in a model, where it actually provides a select dropdown for the model form based on another field value of the model. Normally dropdown shows the values of __str__ methods return value. I want to keep this also since it used in other places.

For example, consider two models Order and Item.

Item have fields called item_code and item_name. __str__ will return item_name.

Order model will have foreign key to Item model. But I want it provides the item_code field values in the dropdown for item selection.

How can I achieve this without changing general foreign key behavior?

Upvotes: 0

Views: 487

Answers (1)

Daniel Roseman
Daniel Roseman

Reputation: 599610

You would do this in the form, by defining a subclass of ModelChoiceField with a custom label_from_instance method, as described in the documentation.

Upvotes: 1

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