We Keep Coding

why I can not link these two pages in my django project

I have 2 models named "developer" and "skill". I made a page for all the developers that have their respective information. Now, I want to make a page that lists all the developers with links that navigate to their respective information page.
The page that shows all the developers' URLs is 'developers/' and its name is "developers". The URL of the second page is 'developers/id' and its name is developer, however it instead navigates to 'developers/developers/id'.
I tried the page that shows the information of a certain developer and it was ok but I have problem with this one cause it won't navigate.
here are my codes :
views.py
from django.shortcuts import render
from .models import Developer, Skill
# Create your views here.
def show_developers(request):
query = Developer.objects.all()
context = {'devs': query}
return render(request, 'users/devs.html', context=context)
def show_single_developer(request, pk):
query = Developer.objects.get(id=pk)
context = {'dev': query}
return render(request, 'users/single_dev.html', context=context)
models.py
from django.db import models
# Create your models here.
class Skill(models.Model):
choices = (
('Beginner', 'Beginner'),
('Junior', 'Junior'),
('Senior', 'Senior'),
)
name = models.CharField(max_length=50)
level = models.CharField(choices=choices, max_length=10)
class Developer(models.Model):
full_name = models.CharField(max_length=50)
username = models.CharField(max_length=50)
intro = models.TextField(blank=True, null=True)
image = models.ImageField()
skills = models.ForeignKey(Skill, on_delete=models.CASCADE)
urls.py
from django.urls import path
from .views import show_developers, show_single_developer
urlpatterns = [
path('developers/', show_developers, name='developers'),
path('developers/<str:pk>/', show_single_developer, name='developer'),
]
devs.html
{% include 'navbar.html' %}
<table>
<tr>
<th>FullName</th>
<th>Username</th>
<th>details</th>
</tr>
{% for dev in devs %}
<tr>
<td>{{dev.full_name}}</td>
<td>{{dev.username}}</td>
<td>View</td>
</tr>
{% endfor %}
</table>
{% include 'footer.html' %}
single_dev.html
{% include 'navbar.html' %}
<h2>{{dev.full_name}}</h2>
<hr>
<h3>Intro</h3>
<h4>{{dev.intro}}</h4>
{% for skill in dev.sills.all %}
<div>
<p>{{skill.name}}</p>
<p>{{skill.level}}</p>
</div>
{% endfor %}
{% include 'footer.html' %}
TraceBack Section
and I add the structures of this app too
Error page

My HTML page won't print my django variable

First of all sorry for my bad english but i'm french.
I am currently working on a django app and i'm trying to make my HTML page work but it won't and i dont know why.
I followed the tutoriel but i edited some of the code to fit my purpose. And now my page won't print out my variable.
I have python 2.7.5 and Django 1.11.29
My html page
Now this is my code for the HTML :
{% if True %}
<p> Vrai </p>
<li>{{ Thriller.title }}</li>
{% else %}
<p> faux </p>
{% endif %}
<ul>
<p> Paragraphe : </p>
<li>{{ Thriller.title }}</li>
<li>{{ Thriller.id }}</li>
</ul>
My code for the Django part :
This is in the models.py file :
from django.db import models
import datetime
from django.utils.encoding import python_2_unicode_compatible
from django.utils import timezone
class Artist(models.Model):
name = models.CharField(max_length=200, unique=True)
def __str__(self):
return self.name
class Album(models.Model):
reference = models.IntegerField(null=True)
created_at = models.DateTimeField(auto_now_add=True)
available = models.BooleanField(default=True)
title = models.CharField(max_length=200, unique=True)
picture = models.URLField()
artists = models.ManyToManyField(Artist, related_name='albums', blank=True)
def __str__(self):
return self.title
This is in the views.py file :
from __future__ import unicode_literals
from django.shortcuts import render
from django.http import HttpResponse
from .models import Album, Artist, Contact, Booking
from django.template import loader
def index(request):
albums = Album.objects.order_by('-created_at')
context = {'albums = ': albums}
template = loader.get_template('polls/index.html')
return HttpResponse(template.render(context, request))
This is also my first post here and i dont really know if the post is good or not so forgive it if it's not good !
You can ask me anything you want. Thank's !

You need to call your context variable in the template instead of {{ Thriller.title }} because you did not specify Thriller in the context of your view.
Your context in the index() view:
context = {'albums = ': albums}
Edit this to:
context = {'albums': albums}
and then in your template, for example to loop over all the album titles:
added the if statement:
{% for album in albums %}
{% if album.title == "Thriller" %}
<p>{{ album.title }}</p>
{% endif %}
{% endfor %}

Try this change to your context
context = {'albums': albums}
Then in your template do...
{% for album in albums %}
<p>{{ album.title }}</p>
{% endfor %}

Show Groupnames in a dropdown list

I am working on a studentresult website in Python and Django. Now I want to ask to the database to give me the names of the groups that are in the database. Using the standard db.sqlite3 database from django. In the Dropdown menu I get three white bars because I have three groups now. When I the Class DisplayGroups to id = Models.IntegerField(id, flat=True) change return.self.group_name to return self.id then the dropdownlist shows me the ID that the group has. But how can I show the name of the group. Tried a lot:
Changed to group in the model
Changed to groupname in the model
Changed a few of the commands in the views.py
Made a new database item Groepen and changed query to that.
views.py
from django.shortcuts import render, redirect
from .models import DisplayGroups, DisplayUsername
from django.contrib.auth.models import User, Group
def index(request):
response = redirect('/login')
return response
def home(response):
return render(response, "home/home.html")
def bekijk(request):
DisplayGroup = Group.objects.all()
print(DisplayGroup)
DisplayNames = User.objects.all()
print(DisplayNames)
return render(request, "home/bekijk.html", {"DisplayGroups": DisplayGroup,"DisplayUsername":DisplayNames})
models.py
from django.db import models
# Create your models here.
class DisplayGroups(models.Model):
group_name = models.CharField(max_length=200)
def __str__(self):
return self.group_name
class DisplayUsername(models.Model):
username = models.CharField(max_length=100)
def __str__(self):
return self.username
The html page
{% extends 'home/base.html' %}
{% block title %}Cijfers studenten{% endblock %}
{% block javascript %}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
$(document).ready(function()
{
var $productvar=$("#groupdd1");
$itemvar=$("#userdd1");
$options=$itemvar.find('option');
$productvar.on('change', function()
{
$itemvar.html($options.filter('[value="'+this.value+'"]'))
}).trigger('change');
});
</script>
{% endblock %}
{% block content %}
<h1>Studentresultaten</h1>
<select id="groupdd1">
<option disabled="true" selected>-- Select Fruit --</option>
{% for result in DisplayGroups %}
<option>{{result.group_name}}</option>
{% endfor %}
</select>
<select id="userdd1">
<option disabled="true" selected>-- Select Fruit --</option>
{% for result in DisplayUsername %}
<option>{{result.username}}</option>
{% endfor %}
</select>
{% endblock %}
The piece of jquery is for later, because I want to make a dependant dropdown menu. Hope you guys can help me. Thanks in advance!

#WilliamVanOnsem is right the model from where you are filtering is Group which do not have group_name as a field. Here's what you can do.
In views.py
DisplayGroup = DisplayGroups.objects.all()
DisplayNames = DisplayName.objects.all()
Now in HTML template you can access group_name and result.username. The User model has username field so result.username did not show an empty text

Django - Models does not call content of database

I have created a class in the models.py containing the information of articles I want to insert in a website
from django.db import models
from django.urls import reverse
class Article(models.Model):
"""
Model representing an article.
"""
title = models.CharField(max_length=200)
authors = models.CharField(max_length=200)
summary = models.TextField(max_length=1000, help_text='Enter a brief description of the article')
content = models.TextField(max_length=100000)
def __str__(self):
"""
String for representing the Model object.
"""
return self.title
def get_absolute_url(self):
"""
Returns the url to access a detail record for this article.
"""
return reverse('article-detail', args=[str(self.id)])
After that, I have inserted an article using the admin panel of Django and saved it.
Then, I have created the index.html shown below calling the articles in the database
<!DOCTYPE html>
<html lang="en">
<head>
{% block title %}{% endblock %}
</head>
<body>
{% block sidebar %}<!-- insert default navigation text for every page -->{% endblock %}
{% block content %}<!-- default content text (typically empty) -->
<!-- Articles -->
<div class="articles">
<h1>Titolo: {{ article.title }}</h1>
<p><strong>Autori:</strong> {{ article.authors }}</p>
<p><strong>Riepilogo:</strong> {{ article.summary }}</p>
<p><strong>Testo:</strong> {{ article.content }}</p>
</div>
{% endblock %}
</body>
</html>
But the article is not shown despite being in the database (see prints below)
EDIT1: inserted views.py as requested
from django.shortcuts import render
from .models import Article
# Create your views here.
def index(request):
"""
View function for home page of site.
"""
# Render the HTML template index.html with the data in the context variable
return render(
request,
'index.html',
)

You are not including any articls in your template context:
return render(
request,
'index.html',
)
You could include the articles in the template context with:
articles = Article.objects.all()
return render(
request,
'index.html',
{'articles': articles}
)
Then in the template you need to loop through the articles.
<!-- Articles -->
<div class="articles">
{% for article in articles %}
<h1>Titolo: {{ article.title }}</h1>
<p><strong>Autori:</strong> {{ article.authors }}</p>
<p><strong>Riepilogo:</strong> {{ article.summary }}</p>
<p><strong>Testo:</strong> {{ article.content }}</p>
{% endfor %}
</div>

django getting error about views.py

This is my views.py
from django.shortcuts import render
from . models import Houses
def houses_list(request):
house = Houses.objects.all().order_by('owner')
return render('Houses.html',{'houses':house})
this my models.py
from django.db import models
class Houses(models.Model):
owner = models.CharField(max_length=250)
house_name = models.CharField(max_length=500)
country = models.CharField(max_length=500)
genre = models.CharField(max_length=100)
def __str__(self):
return self.house_name
class house(models.Model):
houses = models.ForeignKey(Houses, on_delete=models.CASCADE)
file_type = models.CharField(max_length=10)
house_title = models.CharField(max_length=250)
this my url.py
from django.urls import path
from . import views
urlpatterns= [
path('', views.Houses, name='Houses'),
]
this my html file
{% load static %}
<html>
<head>
<meta charset = "utf-8">
<title>Houses</title>
</head>
<body>
<h1>House list</h1>
<div class="house">
{% for house in houses %}
<div class="house">
<h2>{{Houses.house_name}}</h2>
<p>{{Houses.owner}}</p>
<p>{{Houses.genre}}</p>
</div>
{% endfor %}
</div>
</body>
</html>
I'm tring to get the data from my database but on the web getting attribute no object error.But I can see the all objects on the admin page do you have any idea what I'm doing wrong?

Here is code with fixed bugs:
The bug in urls was causing AttributeError. Fix code to:
urlpatterns= [
path('', views.houses_list, name='Houses'),
]
Remember that urls must point to views. But after you fix this, the next error will be in the views.py, because render() is missing request argument. Change to:
def houses_list(request):
house = Houses.objects.all().order_by('owner')
return render(request, 'Houses.html',{'houses':house})
The bug in the template would just render empty. Fix to:
{% for house in houses %}
<div class="house">
<h2>{{house.house_name}}</h2>
<p>{{house.owner}}</p>
<p>{{house.genre}}</p>
</div>
{% endfor %}

You are trying to get attributes from the Houses class in your template. Replace Houses with house, which is the current Houses object returned by the for loop. `
<h1>House list</h1>
<div class="house">
{% for house in houses %}
<div class="house">
<h2>{{house.house_name}}</h2>
<p>{{house.owner}}</p>
<p>{{house.genre}}</p>
</div>
{% endfor %}
</div>
EDIT
As Borut mentioned, your render call in houses_list is missing the request, i.e.
return render(request, ...)
Also, your urlpatterns is referencing Houses model instead of the houses_list view, i.e. it should be views.houses_list instead of views.Houses.