django_q.py

from django.db.models import Q        


condition = Q()

employers = Employer.objects.all()

if params:
    if params.get('name'):
        employers = employers.annotate(search_vector=SearchVector('name'))
        name = Q(search_vector=params.get('name'))
        condition &= name

    if params.get('employer'):
        name = Q(slug=params.get('employer'))
        condition &= name

    if params.get('parent'):
        parent = Q(parent__slug=params.get('parent'))
        condition &= parent

return employers.filter(condition)