Django: Proper Way to Acess data from a One to Many Relationship? - django

Question

I am having issues with accessing data through a django one to many relationship. After 3 painstaking days I figured out a way to display the data from the relationship by overriding the get_context_data method. I was wondering if that was the proper way to do it. This works but I could imagine that there is a better way to do this that I missed in the documentation.
Here is the code for that:
class QuestionDetailView(DetailView):
model = Question
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['answers'] = Answer.objects.filter(firm=context['object'])
return context
Here is the code for the models:
class Question(models.Model):
text = models.CharField(max_length=120, unique=True)
class Answer(models.Model):
question = models.ForeignKey(Question, on_delete=models.CASCADE)
Here is the code in my template:
{% extends "base.html" %}
{% block body %}
<div class="">
<h3>{{ object.text }}</h3>
<p>Answers:</p>
<ul>
{% for answer in answers %}
<li> {{ answer }}</li>
{%empty%}
<li>No answers</li>
{% endfor %}
</ul>
</div>
{% endblock %}

Answer 1

Add a related_name to your question field.
class Answer(models.Model):
question = models.ForeignKey(Question, on_delete=models.CASCADE, related_name="answers")
Or, just use the default that Django gives: answer_set
Then in your template, you can do:
{% for answer in object.answers.all %}
<li> {{ answer }}</li>
{% empty %}
<li>No answers</li>
{% endfor %}
No need to override get_context_data unless you want to do something more specific with the queryset.