Query when parameter is none django

Question

I want to make a query, something like

Model.objects.filter(x=x).filter(y=y).filter(z=z) 

... but there are some cases when for example y

Answer 1

You can write:

filters = {'x':'abc', 'y':None, 'z':2}
# here we filter out the None values of the dict 
filters = dict(filter(lambda (k, v): v is not None, filters.items()))

# We use the dict to create the query
qs = Model.objects.filter(**filters)