Asserting for presence of added objects in Django ManyToMany relation

Question

I have the following model;

class Station(models.Model):
    name = models.CharField(max_length=50)
    address = models.TextField(default=\'\')
    owner = mode         


        

Answer 1

station.members is a Manager, i.e. it is the accessor for queries on the related users. You need to actually perform a query: in this case, station.members.all().

Answer 2

A few issues with your code, this is the output in my console:

>>> station.members
<django.db.models.fields.related.ManyRelatedManager object at 0x110774b10>

station.members is a ManyRelatedManager rather than a list of user2 and user3.

station.members.all() will return you a list of user2 and user3, but station.members.all() is a QuerySet instead of a list:

>>> type(station.members.all())
<class 'django.db.models.query.QuerySet'>

So doing assert station.members.all() == [user2, user3] will never be True.