CODEWITHSUNDEEP
djangodjango-models
nehem
nehem

Reputation: 13662

Django Content-Type : Checking if a field is declared as Many-to-Many field

I checking few field names passed by the APIs from the browser and validating them before passing to Django ORM queries.

The question is for a given mode and given field name, how can I determine if the field is declared as Many-to-Many field using the Content-Type framework?

Upvotes: 1

Views: 90

Answers (2)

Ozgur Vatansever
Ozgur Vatansever

Reputation: 52173

You can get the field and check its .many_to_many property:

>>> content_type = ContentType.objects.get(model="<model_name>")
>>> field = content_type.model_class()._meta.get_field("<field_name>")
>>> field.many_to_many
True

Upvotes: 1

nehem
nehem

Reputation: 13662

You might not require content-type for this to be precise. If you already have the model or an instance handy, you would get the list of m2m fields as below 

m2m_fields = [field.name for field in _object._meta.many_to_many]

If you are after just the field name a.k.a concrete fields use as below

fields = [field.name for field in _object._meta.concrete_fields ]

Upvotes: 0

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