How to check the type of a many-to-many-field in django?

Question

How can you check the type of a many-to-many-field in django?

I wanted to do it this way:
import django
field.__class__ == django.db.models.fields.related.ManyRelatedManager
This doesn't work, because the class ManyRelatedManager can't be found. But if i do field.__class__ the output is django.db.models.fields.related.ManyRelatedManager

Why does it refer to a class that doesn't seem to exist and how can i bring it to work?

Many thanks for your help.

Answer 1

You should be able to check it as a string.

field.__class__.__name__ == 'ManyRelatedManager'

Answer 2

I'm not quite sure what you are trying to achieve, but i guess you should better look into your model's _meta attribute for determining the field class! check out _meta.fields and _meta.many_to_many!

You could do something like:

field_class = [f for f in yourmodel._meta.many_to_many if f.name=='yourfield'][0].__class__

Answer 3

If you already have the field instance you can simply do:

if isinstance(field, ManyToManyField):
    pass // stuff