Q:

See if user in ManyToManyField

I am trying to see if the current user is in the collaborators m2m field, but keep getting an error saying: 
Cannot query "John Doe": Must be "Company" instance.
Could someone help me out with the conditional statement please?
models.py:
class MyUser():
    name = ...
    email = ...

class Company(models.Model):
    user = models.ForeignKey(MyUser, null=True,
                             related_name='company_owner',
                             on_delete=models.SET_NULL)
    collaborators = models.ManyToManyField(MyUser, blank=True, 
                                           related_name='company_collaborators')
    name = models.CharField(max_length=120)

views.py:
def company_dash(request, username):
    user = request.user
    company = get_object_or_404(
        Company, Q(is_active=True), username=username)

    # NEED HELP HERE PLEASE
    if company.user == user or company.collaborators.filter(company_collaborators=user).exists():
        # do something

A:

Full docs is here
You can use
if company.user == user or company.collaborators.filter(collaborators=user):

or 
if company.user == user or company.collaborators.filter(id=user.id):

I think there is no need to add .exists() due to filter(collaborators=user) returns list that to be evaluated to be False if empty.

