Re: How to retrieve data from deep nested object?

Does {% for question in subsection.subsection_set.all %} work?

Dan

On 26 April 2016 at 13:33, Said Akhmedbayev <said.akh@gmail.com> wrote:

I am trying to figure out how to loop over deep nested object in Django template.

Here is my app's code

models.py

from django.db import models

class Unit(models.Model):

    unit_number = models.PositiveIntegerField(blank=True, null=True, default=1)

    title = models.CharField(max_length=150, blank=True, null=True)

    scripture_ref = models.CharField(max_length=250, blank=True, null=True)

    def __str__(self):

        return self.title

class Subsection(models.Model):

    title = models.CharField(max_length=150, blank=True, null=True)

    subsection_text = models.TextField(default='SUBSECTION TEXT')

    unit = models.ForeignKey(Unit, on_delete=models.CASCADE)

class Question(models.Model):

    question_text = models.CharField(max_length=2000, default='QUESTION TEXT')

    subsection = models.ForeignKey(Subsection, on_delete=models.CASCADE)

views.py

from django.shortcuts import get_object_or_404

from django.shortcuts import render

from .models import Unit

def unitdetail(request, unit_id):

    unit = get_object_or_404(Unit, pk=unit_id)

    return render(request, 'correspondence_course/unit_detail.html', {'unit': unit,})

unit_detail.html (template)

<h1>Урок {{ unit.unit_number }}</h1>

<h1>{{ unit.title }}</h1>

{% for subsection in unit.subsection_set.all %}

    <h2>{{ subsection.title }}</h2>

    <div>{{ subsection.subsection_text }}</div>

    {% for question in subsection. %} # this is just for reference. It does not work

        <p>{{ question.question_text }}</p>

    {% endfor %}

{% endfor %}

As you can see I have three class models: Unit, Subsection with back relationship with Unit and then Question with back relationship with Subsection.

I managed to show in the template (see above) unit.title alone with subsection.title and subsection.subsection_text. It is all nice, but I cannot figure out how to loop over and display questions that are nested to Subsection(s).

Can you please help me to figure out how make it work?

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/2f0d18f4-57c1-4852-b510-114a9b7fffc6%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--

Wildman and Herring Limited, Registered Office: Sir Robert Peel House, 178 Bishopsgate, London, United Kingdom, EC2M 4NJ, Company no: 05766374

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAPZHCY4w%2Bdz2ied_%2BYX%3D9y_4x3E%3Dn7SF3Z_WLwRBJRJo5uFO3Q%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.