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Python Django Basics Test Time Django TDD

Copy and paste your models, views, and performer template from Workspaces into the correct files below.

Why is this code not passing?

songs/models.py
from django.db import models

# Write your models here
class Song(models.Model):
  title = models.CharField(max_length=255)
  artist = models.CharField(max_length=255)
  length = models.IntegerField(default=0)
  performer = models.ForeignKey("Performer")

  def __str__(self):
    return '{} by {}'.format(self.title, self.artist)


class Performer(models.Model):
  name = models.CharField(max_length=255)

  def __str__(self):
    return self.name
songs/views.py
from django.shortcuts import get_object_or_404, render

from .models import Song, Performer

def song_list(request):
    songs = Song.objects.all()
    return render(request, 'songs/song_list.html', {'songs': songs})

def song_detail(request, pk):
    song = get_object_or_404(Song, pk=pk)
    return render(request, 'songs/song_detail.html', {'song': song})

def performer_detail(request, pk):
    performer = get_object_or_404(Performer, pk=pk)
    return render(request, 'songs/performer_detail.html', {'performer': performer})
songs/templates/songs/performer_detail.html
{% extends 'base.html' %}

{% block title %}{{ performer.name }}{% endblock %}

{% block content %}
<h2><a href="{% url 'songs:detail' pk=performer.song.pk %}">{{ performer.song.title }}</a></h2>
{% endblock %}

5 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,457 Points

Hi Ginny, I compared your code to a known passing version and found these differences. Making these changes passes the challenge:

# in views.py file:
def performer_detail(request, pk):
    performer = get_object_or_404(Performer, pk=pk)
    # Add missing songs
    songs = Song.objects.filter(performer=performer)
    # Add songs to template context
    return render(request, 'songs/performer_detail.html', {'performer': performer, 'songs': songs})
{# in performer_detail.html template, changes marked by comments such as this #}
{% extends 'base.html' %}

{% block title %}{{ performer.name }}{% endblock %}

{% block content %}
  {# removed link #}
  {#<h2><a href="{% url 'songs:detail' pk=performer.song.pk %}">{{ performer.song.title }}</a></h2>#}
  <h2>{{ performer }}</h2>#}
  {# Add loop to list songs #}
  {% for song in songs %}
   {{ song }}
  {% endfor %}
{% endblock %}

I've tried making the same changes and can't get it to pass...

Seems like it should.

Chris Freeman
Chris Freeman
Treehouse Moderator 68,457 Points

cj thompson: I suggest you create a new forum post and include your code.

nicole lumpkin
nicole lumpkin
Courses Plus Student 5,328 Points

Chris Freeman I am so confused. If views.performer_detail passes performer to performer_detail.html, how in the world are you able to pull off your for song in songs loop?

nicole lumpkin
nicole lumpkin
Courses Plus Student 5,328 Points

What I really want to know Chris Freeman is why my version of performer_detail.html fails the last assertion in the last test in tests.py ?

{% extends 'base.html' %}

{% block title %}{{ performer }}{% endblock %}

{% block content %}
<h2>{{ performer }}</h2>
{{ performer.song_set.all|linebreaks }}
{% endblock %}

UPDATE: Guess what ya'll! With a little help from a developer friend of mine, we figured it out! It turns out that Django was turning my greater than/less than characters('<title> by <artist>' ), to '&gt;' and '&lt;' respectively. I'm a noob, but he explained that those characters ('>' and '<') essentially were being escaped and transformed into the strings in bold. So when self.assertContains(resp, str(self.song)) went looking for '<I Wanna Be Sedated> by <The Ramones>', it instead found '&gt;I Wanna Be Sedated&lt;by&gt;The Ramones&lt;' BUT, if you use the filter safe it prevents this! Check out my passing performer_detail.html!!!

{% extends 'base.html' %}

{% block title %}{{ performer }}{% endblock %}

{% block content %}
<h2>{{ performer }}</h2>
{{ performer.song_set.all|safe|linebreaks }}
{% endblock %}

This also passes!!!

{% extends 'base.html' %}

{% block title %}{{ performer }}{% endblock %}

{% block content %}
<h2>{{ performer }}</h2>
{% for song in performer.song_set.all %}
{{ song|safe }}
{% endblock %}

WHOOP WHOOP!!

not a fan of this challenge.

Samuel Ferree
Samuel Ferree
31,722 Points

So this whole time the challenges have been working with Articles, and writers. In the videos, Kenneth is making a learning site app, and this challenge comes out of nowhere with "Copy your songs and artists from workspaces"

What gives? I have literally no idea what the challeneg is talking about.

Cirrus Streamer
Cirrus Streamer
4,351 Points

The challenge is an entirely new app, with new scenario and objects as a pretend first project. I still cant get it to pass.

Max Hirsh
Max Hirsh
16,773 Points

If you run the project in Workspaces and it passes all the tests, it could be a timeout error. I ran into this issue myself, and the way I solved the problem was by attempting to submit it multiple times/at different times of day. You could even try using a different browser and see if that helps. The issue seems to be that the project is fairly large and sometimes takes longer than the time limit to evaluate.

Chris, I think I realized the error...I wasn't using Workspaces, I was working along in Django. Thanks for the response. I'll try it again in a few days...

EDIT:

I meant I was following along in PyCharm. Jeez. Long day. But I think my problem is that I need to use workspaces. For whatever reason.

Thanks again for responding so quickly.