Develop Reference

How to get additional Django Inline Formsets to POST to database

I'm currently building out a Django ModelForm with an adjoining inline_formset. I'm also using a button with javascript to allow the user to add in more instances of the formset in the front-end. However, the issue im running into is that the extra instances of the formset that are added by the user, don't get sent to the database when the form is submitted.
I'm unsure as to whether it is an issue with the javascript itself. Or something more fundamental to do with the Django inline formsets. Any help would be much appreciated. Everything else is working fine; heres my HTML template for reference
{% extends 'main.html' %}
{% load static %}
{% block content %}
<section id="form">
<form class="form" method="POST" enctype="multipart/form-data">
{% csrf_token %}
{% for field in form %}
<div class="input">
<h1>{{field.label}}:</h1>
<p>{{field}}</p>
</div>
{% endfor %}
<div id="form-container">
{{formset.management_form}}
{% for field in formset %}
<div class="input">
<h1>Parts Required:</h1>
<p>{{field}}</p>
</div>
<div id="empty-form" class="input" style="display: none;">
<p>{{formset}}</p>
</div>
{% endfor %}
</div>
<button class="btn btn-primary" id="add-more" type="button">Add More</button>
<input class="submit btn btn-primary" type="submit"></input>
</form>
</section>
<script>
document.getElementById("add-more").onclick = function () {
var emptyForm = document.getElementById("empty-form");
var newForm = emptyForm.cloneNode(true);
newForm.style.display = "block";
document.getElementById("form-container").appendChild(newForm);
}
</script>
{% endblock content %}
Here's my view for the warranty form:
# Create Warranty Form:
#login_required(login_url='login')
def createWarranty(request):
warranty = WarrantyClaim.objects.all()
form = WarrantyClaimForm()
warrantyformset = inlineformset_factory(WarrantyClaim, PartsRequired, form=WarrantyClaimForm, extra=1)
if request.user.is_authenticated:
if request.method == 'POST':
form = WarrantyClaimForm(request.POST, request.FILES)
formset = warrantyformset(request.POST, request.FILES, instance=WarrantyClaim())
if form.is_valid() and formset.is_valid():
post = form.save(commit=False)
post.owner = request.user
post.save()
formset.instance = post
formset.save()
return redirect('spare-parts')
context = {'warranty': warranty, 'form': form, 'formset': warrantyformset}
return render(request, 'spareparts/parts_form.html', context)

Django - Stop Page from reloading after GET Request

I'd like to show all grades from one user on Button Click. Now I wanted to integrate an expandable Button from Bootstrap. The GET Request works perfectly, but the JavaScript for the expandable Button gets triggered on Button Click and then the Page gets reloaded. That means the Button now is back at the original state. Do you guys maybe have a way to fix that?
noten.html
{% if subject_list %}
<form name="subject-list" method="GET">
<ul>
{% for subject in subject_list %}
<p>
<button class="btn btn-primary" type="submit" data-bs-toggle="collapse" data-bs-target="#{{ subject }}" aria-expanded="false" aria-controls="collapseExample" value="{{ subject }}" id="{{ subject }}" name="subject">
{{ subject }}
</button>
</p>
<div class="collapse" id="{{ subject }}">
<div class="card card-body">
{% if grades %}
{% for grade in grades %}
<li>{{ grade }}</li>
{% endfor %}
{% else %}
<p>Du hast keine Noten in diesem Fach!</p>
{% endif %}
</div>
</div>
{% endfor %}
</ul>
</form>
{% endif %}
views.py
def noten(request):
if request.user.is_authenticated: # if user is logged in
object_list = Subject.objects.order_by('name')
subject_list = []
for subject in object_list:
subject_list.append(subject.name)
if request.method == 'GET':
subject = request.GET.get('subject', '')
if subject != '':
print(f"GET {subject}")
grades = Test.get_grades(student=request.user.id, subject=subject, self=Test)
return render(request, 'noten.html', {'subject_list': subject_list, 'grades': grades})
else:
return render(request, 'noten.html', {'subject_list': subject_list})
else:
return render(request, 'noten.html', {'subject_list': subject_list})
else: # else redirect to login page
return redirect('loginForm:login')

Django/Js: how to post a form without reloading whole page

My application currently flows through 3 pages:
User selects question in index page
User submits answer in answer page
User is presented with result in results page.
I want to compress that down to a single page where the user submits an answer to the question and result is shown on the same page.
The following django-template code separates questions with Bootstrap accordion. How do I post the form without refreshing the whole page? I want to be able to display the result on the page, update CSS styling with Javascript etc.
<h2>{{ category.title }}</h2>
<div class="accordion" id="accordion{{category.title}}">
{% for challenge in category.challenge_set.all %}
<div class="card">
<div class="card-header" id="heading{{challenge.id}}">
<h2 class="mb-0">
<button class="btn btn-link btn-block text-left" type="button" data-toggle="collapse" data-target="#collapse{{challenge.id}}" aria-expanded="true" aria-controls="collapse{{challenge.id}}">
{{ challenge.question_text }} - {{ challenge.point_value }} points
</button>
</h2>
</div>
<div id="collapse{{challenge.id}}" class="collapse in" aria-labelledby="heading{{challenge.id}}" data-parent="#accordion{{category.title}}">
<div class="card-body">
<p>{{ challenge.description }}</p>
<form action="{% url 'challenges:answer' challenge.id %}" method="post">
{% if challenge|is_answered:request %}
<label for="answered">Answer</label>
<input type="text" name="answered" id="answered" value="{{ challenge.answer_text }}" readonly>
{% else %}
{% csrf_token %}
<label for="answer">Answer</label>
<input type="text" name="answer" id="answer">
<input type="submit" value="Submit">
{% endif %}
</form>
</div>
</div>
{% endfor %}
</div>
Here is the view:
def index(request):
context = {'challenges_by_category_list': Category.objects.all()}
return render(request, 'challenges/index.html', context)
def detail(request, challenge_id):
challenge = get_object_or_404(Challenge, pk=challenge_id)
return render(request, 'challenges/detail.html', {'challenge': challenge})
def results(request, challenge_id, result):
challenge = get_object_or_404(Challenge, pk=challenge_id)
return render(request, 'challenges/results.html', {'challenge':challenge, 'result':result})
def answer(request, challenge_id):
challenge = get_object_or_404(Challenge, pk=challenge_id)
result = "Incorrect, try again!"
if challenge.answer_text.lower() == request.POST['answer'].lower():
current_user = request.user
session = User_Challenge(user=current_user, challenge=challenge, answered=True)
session.save()
points = Profile(user=current_user, points=challenge.point_value)
points.save()
result = "Correct!"
return HttpResponseRedirect(reverse('challenges:results', args=(challenge.id, result)))

You can try this:
Add the below script in your template:
<script src="https://code.jquery.com/jquery-3.1.0.min.js"></script>
write a script and a function inside it to submit the form data.
<script type="text/javascript">
function submitData( challenge_id ){
// Get answer from the input element
var answer = document.getElementById("answer").value;
// add the url over here where you want to submit form & challenge_id is also taken as a parameter.
var url = "<your_url>";
$.ajax({
url: url,
data: {
'answer': answer,
},
dataType: 'JSON',
success: function(data){
// show an alert message when form is submitted and it gets a response from the view where result is provided and if url is provided then redirect the user to that url.
alert(data.result);
if (data.url){
window.open(data.url, '_self');
}
}
});
}
</script>
Change type of the submit button and add an onclick event to call the submitData() function and pass the challenge id to it. And remove the action attr from the form.
see below:
<form method="post">
{% csrf_token %}
{% if challenge|is_answered:request %}
<label for="answered">Answer</label>
<input type="text" name="answered" id="answered" value="{{ challenge.answer_text }}" readonly>
{% else %}
<label for="answer">Answer</label>
<input type="text" name="answer" id="answer">
// over here
<button type="button" onclick="submitData({{ challenge.id }})">
Submit
</button>
{% endif %}
</form>
Return a JsonReponse to the ajax call from the views.
views.py
def answer(request, challenge_id):
answer = request.GET.get('answer', False)
url = False
if challenge.objects.filter(id=challenge_id).exists() and answer:
challenge = Challenge.objects.get(id=challenge_id)
if challenge.answer_text.lower() == answer.lower():
current_user = request.user
session = User_Challenge(user=current_user, challenge=challenge, answered=True)
session.save()
points = Profile(user=current_user, points=challenge.point_value)
points.save()
result = "Correct!"
# specify the url where you want to redirect the user after correct answer
url = ""
else:
result = "Incorrect, try again!"
data = {
'result': result,
'url': url
}
return JsonResponse(data)

Make Django Data-Url Attribute string form to work in .prepend

I have a django web app (esr_submit) that has a form and the ability to upload files. When a file is uploaded (using fileupload jquery), the list of uploaded files needs updated via a prepend action, replicating the html for the and . The button contains a data-url attribute which calls on the django url and its respective view to accomplish the delete action. How do I make the data-url attribute a string so the script works?
views.py
from django.shortcuts import render, redirect
from .forms import ServiceRequestForm, FileForm
from .models import RequestAttachment
from django.http import JsonResponse
def delete_file(request, pk):if request.method == 'POST':
file = RequestAttachment.objects.get(pk=pk)
file.delete()
return redirect('/esr_submit/files')
def esr_submit(request):
files = RequestAttachment.objects.all()
if request.user.is_authenticated:
initial_data = {'first_name': request.user.first_name,
'last_name': request.user.last_name,
'email': request.user.email,
'contact': request.user.phone,
}
request_form = ServiceRequestForm(initial=initial_data)
else:
request_form = ServiceRequestForm()
if request.method == 'POST':
if 'submit_request' in request.POST:
request_form = ServiceRequestForm(request.POST)
if request_form.is_valid():
request_form.save()
return redirect('/esr_submit/')
else:
print(request_form.errors)
return redirect('/esr_submit/')
if 'file' in request.FILES:
form = FileForm(request.POST, request.FILES)
if form.is_valid():
file = form.save()
data = {'is_valid': True, 'name': file.file.name, 'url': file.file.url}
else:
data = {'is_valid': False}
return JsonResponse(data)
else:
print("not a file form")
else:
files_list = RequestAttachment.objects.all()
return render(request, 'esr_submit/esr_submit.html',
{'request_form': request_form,
'files': files,
'photos': files_list
}
)
urls.py
from django.urls import path
from . import views
urlpatterns = [
path('', views.esr_submit, name='esr_submit'),
path('files/', views.file_list, name='file_list'),
path('files/<int:pk>/', views.delete_file, name='delete_file'),
esr_submit.html
{% extends "main/base.html" %}
{% block title %}
Submit an ESR
{% endblock %}
{% load crispy_forms_tags %}
{% block content %}
<head>
</head>
<br>
<div class="container">
<div class="row justify-content-md-center mb-2">
<div class="col-sm-8 mb-4 shadow-lg p-3 bg-white rounded">
<div class="header mb-2">
<h3 class="header mb-0 text-center">New Engineering Service Request</h3>
{% if not request.user.is_authenticated %}
<div class="text-center">
<small class="text-muted"><strong>Want to speed things up? </strong>
Log In |
</small>
<small class="text-muted">
Create an account
</small>
</div>
{% endif %}
</div>
<form method="post" enctype="multipart/form-data" id="request_form"
class="request_form">
<div class="col">
{% csrf_token %}
{% crispy request_form %}
<span class="helper-text"></span>
</div>
</form>
<div class="container">
<button type="button" class="btn btn-primary js-upload-photos">
<span class="glyphicon glyphicon-cloud-upload"></span> Upload File(s)
</button>
{# 2. FILE INPUT TO BE USED BY THE PLUG-IN #}
<form id="fileForm">
<input id="fileupload" type="file" name="file" class="file" multiple
style="display: none;"
data-url="{% url 'esr_submit:esr_submit' %}"
data-form-data='{"csrfmiddlewaretoken": "{{ csrf_token }}"}'>
</form>
{# 3. TABLE TO DISPLAY THE UPLOADED FILES #}
<div id="myTable">
<table id="file-table" class="file-table table-borderless">
<thead>
<tr>
{% if photo in photos %}
<th>Attached Files</th>
{% else %}
{% endif %}
</tr>
</thead>
<tbody class="file-body">
{% for file in files %}
{% if file.file %}
<tr id="file-{{file.id}}"
class="file">
<td class="w-50">
{{ file.file }}
</td>
<td class="delete" id="delete">
<button type=submit data-id="file-{{file.id}}" data-url="{% url 'esr_submit:delete_file' file.pk %}" class="file-delete-btn btn btn-danger btn-sm">X</button>
</td>
</tr>
{% else %}
{% endif %}
{% endfor %}
</tbody>
</table>
</div>
</div>
<div class="pl-2 mt-2">
<button type="submit" name="submit_request" value="submit_request" class="btn btn-primary" form="request_form">Submit Request</button>
<button type="submit" name="save_draft" value="save_draft" id="save_draft" class="btn btn-primary" form="request_form">Save Draft</button>
</div>
</div>
</div>
</div>
{% endblock content%}
script.js (loaded on the base.html)
/* Multiple File Upload Using AJAX - FROM SIMPLE IS BETTER THAN COMPLEX EXAMPLE */
$(function fileupload() {
/* 1. OPEN THE FILE EXPLORER WINDOW */
$(".js-upload-photos").click(function () {
$("#fileupload").click();
});
/* 2. INITIALIZE THE FILE UPLOAD COMPONENT */
$("#fileupload").fileupload({
dataType: 'json',
done: function (e, data) { /* 3. PROCESS THE RESPONSE FROM THE SERVER */
if (data.result.is_valid) {
console.log(data)
$("#file-table tbody").prepend(
"<tr><td><a href='" + data.result.url + "' target='_blank'>" + data.result.name + "</a></td><td class='delete'><button type=submit data-id='file-{{file.id}}' data-url="{% url 'esr_submit:delete_file' file.pk %}" class='file-delete-btn btn btn-danger btn-sm'>X</button></td></tr>"
)
}
}
});
});
$('#myTable').on('click', '.file-delete-btn', function(e){
e.preventDefault();
var tableId = $(this).attr('file-table')
var fileId = $(this).attr('data-id');
var formAction = $(this).attr('data-url');
$.ajax({
url: formAction,
method: 'POST',
success: function(){
$("#file-" + fileId).remove()
console.log("file removed")
$("#myTable").load(" #myTable");
},
error: function(errorData){
console.log("error")
console.log(errorData)
}
});

You cannot use the {% url %} tag in Javascript if this is a separate file.
If you just have a file script.js, it will not work.
In this case you want to generate the correct URL for the delete part. The best way to do this in the most reliable way (so it would still work if you edit the urls.py) is to use the Django urlresolvers.
Then return the data back to your upload process.
On the top of your Python file, place this:
from django.core.urlresolvers import reverse
The last bit of the POST-part in esr_submit() could look like this:
if 'file' in request.FILES:
form = FileForm(request.POST, request.FILES)
if form.is_valid():
file = form.save()
data = {'is_valid': True, 'name': file.file.name, 'url': file.file.url, 'file_id': file.id, 'remove_url': reverse('esr_submit:delete_file', args=[file.id])}
else:
data = {'is_valid': False}
return JsonResponse(data)
else:
print("not a file form")
The Javascript bit could look like this:
/* 2. INITIALIZE THE FILE UPLOAD COMPONENT */
$("#fileupload").fileupload({
dataType: 'json',
done: function (e, data) { /* 3. PROCESS THE RESPONSE FROM THE SERVER */
if (data.result.is_valid) {
$("#file-table tbody").prepend(
"<tr><td><a href='" + data.result.url + "' target='_blank'>" + data.result.name + "</a></td><td class='delete'><button type=submit data-id='file-" + data.result.file_id + "' data-url='" + data.result.remove_url + "' class='file-delete-btn btn btn-danger btn-sm'>X</button></td></tr>"
)
}
}
});
I don't have your app running to this is from the top of my head.

form wizard does not move to the next screen in a jquery dialog

I an using django-crispy forms and using that in a jquery dialog box to show a form wizard. the problem that I am facing is that when used in the dialog box the wizard never moves to the next screen.
So, my wizard is defined as follows:
class ContactWizard(SessionWizardView):
def get_template_names(self):
return "reviewdialog.html"
def done(self, form_list, **kwargs):
return HttpResponseRedirect('index')
And the template is defined as:
{% load crispy_forms_tags %}
{% load i18n %}
{% block content %}
<form action="." method="post">
{% csrf_token %}
<table>
{{ wizard.management_form }}
{% if wizard.form.forms %}
{{ wizard.form.management_form }}
{% for form in wizard.form.forms %}
{% crispy form %}
{% endfor %}
{% else %}
{% crispy wizard.form %}
{% endif %}
{% if wizard.steps.prev %}
<button name="wizard_goto_step" value="{{ wizard.steps.first }}">{% trans "first step" %}</button>
<button name="wizard_goto_step" value="{{ wizard.steps.prev }}">{% trans "prev step" %}</button>
{% endif %}
</table>
<input type="submit" class="btn btn-success" value = "NEXT">
</form>
{% endblock %}
Now, I show this in a jquery dialog where I have overridden the submit method to ensure that the dialog does not close on clicking the 'NEXT' button
<script>
function EditDialog(pk) {
$.ajax({
url: "{% url 'populatereviewform' %}",
method: 'GET',
data: {
pk: pk
},
success: function(formHtml){
//place the populated form HTML in the modal body
$('.modal-body').html(formHtml);
$( "#dialog" ).modal({width: 500, height: 500});
},
dataType: 'html'
});
$('#dialog').submit( function(e) {
return false;
});
return false;
}
</script>
The AJAX part just populates the form with some data and the dialog object is a standard jquery modal dialog. The form is shown at the first screen and is populated with the correct value but when I press NEXT nothing happens in the sense that the wizard does not transition.
The urls.py is configured as:
url(r'^review/(?P<pk>\d+)/$', views.ContactWizard.as_view([DummyForm, OtherForm]), name='review'),
Som, the form starts with the DummyForm (which is a ModalForm) but does not progress to the next wizard screen. I have a feeling it could be something to do with my javascript but could bit get to the bottom of this.
EDIT
So, based on #udi's answer, I tried the following:
$("#dialog").submit(function(e)
{
$.ajaxSetup({
beforeSend: function(xhr, settings) {
if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
xhr.setRequestHeader("X-CSRFToken", csrftoken);
}
}
});
var postData = $(this).serializeArray();
var formURL = $(this).attr("action");
$.ajax(
{
url : formURL,
type: "POST",
data : postData,
success:function(data, textStatus, jqXHR)
{
$('.modal-body').html(data);
},
error: function(jqXHR, textStatus, errorThrown)
{
alert(errorThrown)
}
});
e.preventDefault(); //STOP default action
e.unbind(); //unbind. to stop multiple form submit.
});
return false;
}
However, the data that is returned here is not the next screen of the wizard but the underlying page on which the dialog is shown. So, perhaps it is the formURL or postdata variables that are not initialized properly?
The template for the wizard screen is:
{% load crispy_forms_tags %}
{% load i18n %}
{% block head %}
{{ wizard.form.media }}
{% endblock %}
{% block content %}
<form id="review-form" action="." method="post">
{% csrf_token %}
<table>
{{ wizard.management_form }}
{% if wizard.form.forms %}
{{ wizard.form.management_form }}
{% for form in wizard.form.forms %}
{% crispy form %}
{% endfor %}
{% else %}
{% crispy wizard.form %}
{% endif %}
{% if wizard.steps.prev %}
<button name="wizard_goto_step" class="btn btn-success" value="{{ wizard.steps.first }}">{% trans "first step" %}</button>
<button name="wizard_goto_step" class="btn btn-success" value="{{ wizard.steps.prev }}">{% trans "prev step" %}</button>
{% endif %}
</table>
<input type="submit" class="btn btn-success" value = "Hello">
</form>
{% endblock %}

You will need to get the html of the next form via jQuery and update it in the dialog.