Develop Reference

Content not visible on webpage

I am creating a database website with python and django. My problem is that the content I try to get data from my class' fields doesn't appear on the id-page on django. I am able to make a successful search, and I get links for my searches. The name-field is visible in searches and on the page, but nothing else appears. When I click on the link, I go to luokka_id/number. I must be missing something but can't figure out what the problem is.
models.py
class luokka(models.Model):
nimi = models.CharField('Pääkäyttöluokka', max_length=100)
vara = models.CharField('Varakäyttöluokka', max_length=100)
varaaja = models.CharField('Varakäyttöluokka', max_length=100)
def __str__(self):
return self.nimi
and on the näytä_luokka.html (show class):
{% extends 'tietokanta/base.html' %}
{% block content %}
<center>
{{luokkalistaus}}
{{luokka}}
{{ luokka.nimi }}
{{ luokka.vara }}
{{ luokka.varaaja }}
</center>
{% endblock %}
and views.py:
def näytä_luokka(request, luokka_id):
luokkalistaus = luokka.objects.get(pk=luokka_id)
return render(request, 'tietokanta/näytä_luokat.html',
{'luokkalistaus': luokkalistaus})
I don't get any errors to help me out here. It's just an empty page, but it should show some extra data.

You have named the key of context as luokkalistaus not luokka, so the template should be:
{% extends 'tietokanta/base.html' %}
{% block content %}
<center>
{{ luokkalistaus.nimi }}
{{ luokkalistaus.vara }}
{{ luokkalistaus.varaaja }}
</center>
{% endblock %}

crispy_forms.exceptions.CrispyError: |as_crispy_field got passed an invalid or inexistent field - models.ForeignKey

I'm trying to create a frontend data entry page for an existing model. However, when clicking the link, I get an error:
crispy_forms.exceptions.CrispyError: |as_crispy_field got passed an invalid or inexistent field
Just to be clear, adding the data from Django Admin works with no issues at all.
Having looked through a number of answered questions here, one did highlight what I believe could be problem, but it was out of context and did not provide much of an explanation.
I am trying to create a frontend entry form for users that corresponds with a foreign key.
models.py
class NewHandoff(models.Model):
handoff_pk = models.AutoField(primary_key=True)
handoff_date = models.DateField(auto_now_add=True,verbose_name="Handoff Date")
shift1_pri = models.ForeignKey(Engineer,on_delete=models.CASCADE,verbose_name="Shift 1 Primary")
shift1_sec = models.ForeignKey(Engineer,on_delete=models.CASCADE,verbose_name="Shift 1 Secondary")
def __str__(self):
return f"{self.handoff_date}"
class Meta:
verbose_name_plural = 'Handoffs'
# New Handoff Form
class NewHandoffForm(forms.ModelForm):
class Meta:
model = NewHandoff
fields = ['shift1_pri','shift1_sec']
views.py
from django.shortcuts import redirect, render
from django.views import View
from django.contrib.auth.mixins import LoginRequiredMixin
from django.http.response import HttpResponse
from django.contrib import messages
from .models import AttentionForm, NewHandoffForm
# Handoff View Page
class NewHandoffView(LoginRequiredMixin,View):
def get(self, request):
greeting = {}
greeting['heading'] = "New Handoff"
greeting['pageview'] = "Handoff"
return render (request,'handoff/handoff-new.html')
def post(self, request):
if request.method == "POST":
if "add-new-handoff-button" in request.POST:
create_new_handoff_form = NewHandoffForm(request.POST)
create_new_handoff_form.save()
return redirect("/handoff/handoff-create")
handoff-new.html
{% extends 'partials/base.html' %}
{% load static %}
{% load humanize %}
{% load crispy_forms_tags %}
{% block extra_css %}
<link href="{% static 'libs/bootstrap-datepicker/dist/css/bootstrap-datepicker.min.css' %}" rel="stylesheet">
{% endblock %}
{% block contents %}
<div class="row">
<div class="col-12">
<div class="card">
<div class="card-body">
<!-- New Form -->
<form method="POST">
{% csrf_token %}
<div class="row">
<div class="row-fluid pb-1">
<!-- Field 1 -->
<div class="mb-3">
{{ form.shift1_pri|as_crispy_field }}
</div>
<!-- End of Field 1 -->
</div>
</div>
<div class="d-flex flex-wrap gap-2">
<button type="submit" class="btn btn-primary waves-effect waves-light" name="add-new-handoff-button">Create New Handoff</button>
</div>
</form>
<!-- End of New Form -->
</div>
</div>
</div>
</div>
{% endblock %}
{% block extra_javascript %}
{% endblock %}
Someone mentioned in another post that forms should correlate with the declared form name {{ form.shift1_mod|as_crispy_field }} so it should actually be {{ create_new_handoff_form.shift1_mod|as_crispy_field }} but I have tried changing this and still get the same problem, plus, another model form works fine with just form despite the name of the form being attention_form.
Does anyone have any idea or can point me in the right direction? :)

You are not passing the form through the context in the template. As you are inheriting View, Add the following line in the get() and afterwards in the post() method appropriately:
form = NewHandoffForm()
# and then change return
return render(request,'handoff/handoff-new.html', {'form': form })
Also, you have a space after render in the get function. I hope this is a typo here, but not in your code.

Django-autocomplete-light showing empty dropdown instead of autocomplete widget

I am trying to implement django-autocomplete-light in my projects but cannot figure out why it does not show me the autocomplete widget, but keeps showing an empty dropdown.
I followed the tutorial: https://django-autocomplete-light.readthedocs.io/en/3.1.3/tutorial.html.
I found that this problem has occurred in other stackoverflow questions, but none of those answers have helped me so far.
I have the following model:
class Vilt(models.Model):
vilt_title = models.CharField(max_length=200, unique=True)
I created this autocomplete view:
class ViltAutocomplete(autocomplete.Select2QuerySetView):
def get_queryset(self):
# Don't forget to filter out results depending on the visitor !
# if not self.request.user.is_authenticated():
# return Vilt.objects.none()
qs = Vilt.objects.all().order_by('vilt_title')
if self.q:
qs = qs.filter(vilt_title__istartswith=self.q)
return qs
I use this ModelForm where I specify the widget.
from .models import Vilt
from dal import autocomplete
class ViltSearchForm(forms.ModelForm):
vilt_title = forms.ModelChoiceField(
queryset = Vilt.objects.all(),
widget = autocomplete.ModelSelect2(url='vilt-autocomplete')
)
class Meta:
model = Vilt
fields = ('vilt_title',)
from .views import (ViltAutocomplete,
)
urlpatterns = [
#other paths
path('vilt/autocomplete/', ViltAutocomplete.as_view(), name='vilt-autocomplete'),
#other paths
]
{% extends "bierviltje/base.html" %}
{% load static %}
{% load crispy_forms_tags %}
{% block content %}
<div class="container">
#other forms
<div>
<form action="" method="post">
{% csrf_token %}
{{ vilt_search_form|crispy }}
<input type="submit" />
</form>
</div>
#other forms
</div>
{% endblock content %}
{% block javascript %}
{{ vilt_search_form.media }}
{% endblock javascript %}
This is the Javascript that is loaded in before the javascript block in base.html:
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
{% block javascript %}
{% endblock javascript %}

It's been sometime since you posted your query. But in case you have not found the answer yet, here is the solution:
In your ModelForm "ViltSearchForm", please change the widget from:
widget = autocomplete.ModelSelect2(url='vilt-autocomplete')
to:
widget = autocomplete.ListSelect2(url='vilt-autocomplete')
However, if I may add here, I can't fathom the reason for using "autocomplete" on a stand alone model.
A feedback would be much appreciated.

Not able to iterate over a queryset in Django template

I need to iterate through a list of checkboxes and add a link to each of them. However I am not able to do so.
The template shows the complete form as a link istead of an individual checkbox being a list.
Below given is my code:
Here is my forms.py:
class GetTaskDescription(forms.Form):
get_tasks = forms.ModelMultipleChoiceField(
queryset=Task.objects.none(),
widget=forms.CheckboxSelectMultiple,
required=True
)
def __init__(self, *args, **kwargs):
self.user = kwargs.pop('user')
super(GetTaskDescription, self).__init__(*args, **kwargs)
self.fields['get_tasks'].queryset = self.user.task_set.all()
def get_task_description(self):
tasks = self.cleaned_data['get_tasks']
return tasks
Here is my html:
{% extends 'todoapp/base.html' %}
{% block title %}Select a Task{% endblock %}
{% block content %}
<h2>Select tasks to view description</h2>
<form method="get" action="{% url 'view_task_description' %}" name="view_task_description">
{% for tasks in view_tasks %}
{{ tasks }}
{% endfor %}
<br/>
<input type="submit" value="View Description">
<button onclick="location.href='{%url 'dashboard' %}?name=Go back'" type="button">Go back</button>
</form>
{% endblock %}
Here is my views.py:
#login_required(login_url='/login/')
def view_task_description(request):
task_description = GetTaskDescription(data=request.GET, user=request.user)
if task_description.is_valid():
obj = GetTaskDescription.get_task_description(task_description)
print obj
return render(request, 'todoapp/task_desc.html', context={'description': obj})
return render(request, 'todoapp/select_task_description.html', context={'view_tasks': GetTaskDescription(user=request.user)})

You're trying to iterate over a form instance:
'view_tasks': GetTaskDescription(user=request.user)
{% for tasks in view_tasks %}
To access field choices you should use view_tasks.fields.get_tasks.choices in template.

I can't display posts only with a boolean field set to true in my template

In short - I have a bootstrap carousel and it works nicely, however I can't get it to display only fields with 'featured' set to 'true'
I have tried doing for post in posts.objects.featured (the carousel literally does not show up at all then) and variations like posts.objects.filter(featured=True) (it says it can't parse the remainder).
Here's the code from the template where I am trying to display the carousel image only with items with featured=True
{% for post in posts.objects.featured %}
<div class="carousel-item {% if forloop.first %}active{% endif %} ">
{% image post.image fill-1920x500 %}
<div class="carousel-caption d-none d-md-block">
<h2 id="inner-carousel-title">{{post.title}}</h2>
<h4><a href="{% pageurl post %}" style="color:white;text-shadow:2px 2px 4px #000000" >something</a></h4>
</div>
</div>
{% endfor %}
Again, I just want the carousel to show up only with featured posts
As a side note- it'd be awesome if it only showed 3 posts.
EDIT - Here's my model.py for the page
class BlogPage(RoutablePageMixin, Page):
description = models.CharField(max_length=240, blank=True)
content_panels = Page.content_panels + \
[FieldPanel("description", classname="full")]
def get_context(self, request, *args, **kwargs):
context = super(BlogPage, self).get_context(request, *args, **kwargs)
context['posts'] = self.posts
context['blog_page'] = self
return context

If you really want to do this in the template do:
{% for post in posts %}
{% if post.featured %}
<div> ... <div/>
{% endif %}
{% endfor %}
But you can also pass only the featured posts to your template in your view. Just add:
...
featured_posts = Post.objects.filter(featured=True)[:4]
return render('post_list.html', {'featured_posts': featured_posts, ...})
If you’re using Django’s generic ListView and you’re only showing the featured posts, you can set the queryset property to filter only the featured posts. If you’re also showing the other posts in your ListView, add the featured_posts to your context by overriding get_context_data().

You can try this if the way I suggested in the comment doesn't work
{% for post in posts %}
{% if post.featured %}
// write down your stuff
{% endif %}
{% endfor %}