difference between filter with multiple arguments and chain filter in django

Question

What is the difference between filter with multiple arguments and chain filter in django?

Answer 1

Most of the time, there is only one possible set of results for a query.

The use for chaining filters comes when you are dealing with m2m:

Consider this:

# will return all Model with m2m field 1
Model.objects.filter(m2m_field=1) 

# will return Model with both 1 AND 2    
Model.objects.filter(m2m_field=1).filter(m2m_field=2) 

# this will NOT work
Model.objects.filter(Q(m2m_field=1) & Q(m2m_field=2))

Other examples are welcome.