Django结合Q对象和order_by

Question

I'm trying to abstract all the filtering logic of a form SearchForm(forms.Form) in a function called get_filters .

get_filters returns a Q object which is then used by the view to filter the actual queryset. As such, get_filters doesn't and mustn't know anything about the queryset: its job is just that of returning a filter which can be passed to .filter()

views.py:

def my_view(request):
    form = SearchForm(request.GET)

    if form.is_valid():
        filters = form.get_filters()
        Model.objects.filter(filters)

forms.py:

class SearchForm(forms.Form):
    """
    Fields...
    """
    def get_filters(self):
        """
        filtering logic
        """
        return Q(some_filters)

This works fine. However, I now need an "order by" field.

Can I do that with Q objects in the get_filters function? Or I have no way other than breaking this programming pattern and access form.cleaned_data in the view?

Answer 1

Instead of get_filter doing the order_by, can you have the view do it?

from my_app.models import Project
filters = get_filters(form)
ps = Project.objects.order_by('name').filter(filters)