python - Django - Best practice to join two models -

i'm developing project allows users make test based in random questions. models.py has 2 classes:

class question(models.model):     content = models.charfield()     ...  class answer(models.model):     content = models.charfield()     iscorrect = models.booleanfield()     question = models.foreignkey(question) 

and in views.py 20 random questions using query:

questions = question.objects.order_by('?')[:20] 

with approach have questions want answers related every question, found solutions i'd know best practice question , related answers? can add them question constructor?

thanks!

you can @karthikr said, make database call each question.

i maybe way:

questions = question.objects.order_by('?')[:20] answers = answer.objects.filter(question__in=questions)  #some databases not suppoert this, use: #answers = answer.objects.filter(question_id__in=[q.id q in questions])  question in question:     answers_for_question = filter(lambda answer:answer.question_id = question_id, answers) 

which 2 db calls instead of 21

(for large sets of questions, make use of itertools answers. better performance)