Django/GraphQL triple join table -

i creating app allows users answer form.

so have :

class form(models.model):     owner = models.foreignkey(user, on_delete=models.cascade)     topic = models.charfield(max_length=40)  class question(models.model):     form = models.foreignkey(form, on_delete=models.cascade)     text = models.charfield(max_length=200)     question_type = models.charfield(max_length=10)  class participation(models.model):     user = models.foreignkey(user, on_delete=models.cascade)     form = models.foreignkey(form, on_delete=models.cascade)     created_at = models.datetimefield(auto_now_add=true)  class answer(models.model):     participation = models.foreignkey(participation)     question = models.foreignkey(question)     value = models.charfield(max_length=255) 

where user model django.contrib.auth.models

how can query users have answered specific form ?

how can query users have answered specific form ?

if have specific form instance, can answers, user has participated , answered , users:

users = answer.objects.filter(participation__form=form).values('participation__user') 

if want cautious, check if form in question same form in participation:

users = answer.objects.filter(participation__form=form,                   question__form=form).values('participation__user')