Develop Reference

Method Not Allowed (POST) in ajax request with django

I am trying to pass the values of form data through ajax .And getting method not allowed error. I am trying to add comment in a blog post.
This is my form which is inside blog_detail page
<form id="commentform" class="commentform" method="post">
{% csrf_token %}
{%with allcomments.count as total_comments%}
<p>
{{total_comments}} comment{{total_comments|pluralize}}
</p>
{%endwith%}
<select name="blog" class="d-none" id="id_blog">
<option value="{{blog.id}}" selected="{{blog.id}}"></option>
</select>
<label class="small font-weight-bold">{{comment_form.parent.label}}</label>
{{comment_form.parent}}
<div class="d-flex">
<img class="avatar_comment align-self-center" src="{% for data in avatar%}{{data.avatar.url}}{%endfor%}" alt="">
{{comment_form.content}}
</div>
<div class="d-flex flex-row-reverse">
<button value="commentform" id="newcomment" type="submit" class="newcomment btn btn-primary">Submit</button>
</div>
</form>
And when I click the button it should call the ajax
$(document).on('click','#newcomment',function(e){
e.preventDefault();
var button =$(this).attr("value");
var placement = "commentform"
if (button=="newcommentform"){
var placement = "newcommentform"
}
$.ajax({
type: 'POST',
url: '{% url "website:addcomment" %}',
data: $("#" + button).serialize(),
cache: false,
sucess: function(json){
console.log(json)
$('<div id="" class="my-2 p-2" style="border: 1px solid grey"> \
<div class="d-flex justify-content-between">By ' + json['user'] + '<div></div>Posted: Just now!</div> \
<div>' + json['result'] + '</div> \
<hr> \
</div>').insertBefore('#' + placement);
},
error: function(xhr,errmsg,err){
}
});
})
This is my urls.py
path('blog/<int:blog_id>', BlogDetails.as_view(), name="blog_detail"),
path('addcomment/',addcomment, name="addcomment"),
and my views.py is:
class BlogDetails(View):
def get(self, request, blog_id):
query = request.GET.get('query')
if query:
return redirect(reverse('website:search') + '?query=' + query)
blog = Blog.objects.get(id=blog_id)
total_comment = Comment.objects.filter(blog=blog).count()
allcomments = blog.comments.filter(status=True)
blog_list = Blog.objects.all()
comment_form = NewCommentForm()
data = {
'blog': blog,
'blog_list': blog_list,
'total_comment': total_comment,
'comment_form': comment_form,
'allcomments': allcomments
}
return render(request, "blog_detail.html", data)
def addcomment(request):
if request.method == 'post':
comment_form = NewCommentForm(request.POST)
print(comment_form)
if comment_form.is_valid():
user_comment = comment_form.save(commit=False)
user_comment.user = request.user
user_comment.save()
result = comment_form.cleaned_data.get('content')
user = request.user.username
return JsonResponse({'result': result, 'user': user})
Please help me with this it is not calling addcomment view

If how I've interpreted your code is correct, it would probably work if changed your BlogDetails class to this:
class BlogDetails(View):
def get(self, request, blog_id):
query = request.GET.get('query')
if query:
return redirect(reverse('website:search') + '?query=' + query)
blog = Blog.objects.get(id=blog_id)
total_comment = Comment.objects.filter(blog=blog).count()
allcomments = blog.comments.filter(status=True)
blog_list = Blog.objects.all()
comment_form = NewCommentForm()
data = {
'blog': blog,
'blog_list': blog_list,
'total_comment': total_comment,
'comment_form': comment_form,
'allcomments': allcomments
}
return render(request, "blog_detail.html", data)
def post(self, request, *args, **kwargs):
return self.addcomment(request)
def addcomment(self, request):
comment_form = NewCommentForm(request.POST)
print(comment_form)
if comment_form.is_valid():
user_comment = comment_form.save(commit=False)
user_comment.user = request.user
user_comment.save()
result = comment_form.cleaned_data.get('content')
user = request.user.username
return JsonResponse({'result': result, 'user': user})
Because you are trying to POST to a view that doesn't have a post method defined.
Then you would need to remove addcomment from the URL you are calling and just post to whatever URL you are currently at.

Django URLs not working properly in template

I am making social network website where user can post and like the post. On one of my templates, image of heart (which represents if post is liked or not) is not loading because of incorrect path: this is the incorrect one: other_profile/static/network/nolike.png. It should be: static/network/nolike.png. other_profile is the name and path of my template. Same happens in case of other API fetch calls on my website. URL should not begin with other_profile. And this happens only on other_profile HTML page.
The code:
urls.py
from django.urls import path
from . import views
urlpatterns = [
path("", views.index, name="index"),
path("profile", views.profile, name="profile"),
path("login", views.login_view, name="login"),
path("logout", views.logout_view, name="logout"),
path("register", views.register, name="register"),
path("Post/<str:post_id>", views.likes, name="likes"),
path("follows/<str:user_id>", views.follows, name="follows"),
path("following", views.following, name="following"),
path("other_profile/<str:user_id>", views.other_profile, name="other_profile")
]
views.py snippet
import json
from urllib.request import Request
from django.contrib.auth import authenticate, login, logout
from django.db import IntegrityError
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import redirect, render
from django.urls import reverse
from .forms import NewPostForm, likeForm, followForm
from .models import User, Post, Likes, Follows
from django.contrib.auth.decorators import login_required
from django.http import JsonResponse
from django.core.exceptions import ObjectDoesNotExist
from datetime import datetime
def other_profile(request, user_id):
followform = followForm(request.POST or None)
if request.method == "POST":
try:
Follows.objects.filter(following__in=[user_id]).get(following=request.user).delete()
except Follows.DoesNotExist:
if followform.is_valid():
follows = followform.save(commit=False)
follows.user = User.objects.get(id=user_id)
follows.save()
follows.following.add(request.user)
posts = Post.objects.filter(user = user_id).order_by('-date')
return render(request, "network/otherprofile.html", {
"posts":posts, "followform":followform})
otherprofile.html
{% extends "network/layout.html" %}
{% block body %}
TODO
{% if user.is_authenticated %}
<form method="POST">{% csrf_token %}
{{ followform }}
<button id="follow">Follow</button>
</form>
<div id="posts">
{% for post in posts %}
{{ post.user.username }}
<div class="name" id = "{{ post.user.id }}"><div>{{ post.date }}</div>{{ post.post }}</div>
<div id ="heart"></div>
{% endfor %}
</div>
{% endif %}
<script>
document.querySelector("#follow").addEventListener('click', () => {
var requestfollow = new Request(
`follows/${document.querySelector(".name").id}`,
{
method: 'POST',
}
);
fetch(requestfollow).then((response) => response.json()).then((data) => {
if (data.user_id == post.user.id) {
document.querySelector("#follow").innerHTML="Unfollow"
}})})
</script>
{% endblock %}
js file
document.addEventListener('DOMContentLoaded', function() {
var heart = new Image();
heart.id = "main";
heart.style.animationPlayState = 'paused';
var allButtons = document.querySelector('#posts').childElementCount;
var content = document.querySelectorAll('.name');
var button = document.querySelectorAll('#heart');
var csrftoken = document.querySelector('[name=csrfmiddlewaretoken]').value;
for (i = 0; i < allButtons / 2 - 1; i++) {
function listen(i) {
var requestPOST = new Request(
`/Post/${content[i].id}`,
{
method: 'POST',
headers: {'X-CSRFToken': csrftoken},
mode: 'same-origin' // Do not send CSRF token to another domain.
}
);
var requestGET = new Request(
`/Post/${content[i].id}`,
{
method: 'GET',
}
);
var heart = new Image();
heart.style.animationPlayState = 'paused';
heart.id = "main";
fetch(requestGET).then((response) => response.json()).then((data) => {
console.log(data.like)
if (data.like == true) {
heart.src = "static/network/like.png"
}
else{
heart.src = "static/network/nolike.png"
}
button[i].appendChild(heart);
})
button[i].addEventListener('click', () =>
fetch(requestPOST).then((response) => {
if (response.ok) {
response.json().then((data) => {
console.log(data.like)
if (data.like == true) {
heart.src = "static/network/like.png"
}
else{
heart.src = "static/network/nolike.png"
}
button[i].appendChild(heart);
heart.style.animationPlayState = 'running';
})}
else {
api(i)
console.log("not ok")
}}))}listen(i)}})
I also have a js file in static files. If that is needed let me know.
Help would be greatly appreciated!

the django way of handling static files is to use the static tag
{% static 'network/nolike.png' %}
but please be aware to setup static stuff in settings.py
https://docs.djangoproject.com/en/4.0/howto/static-files/

heart.src = "/static/network/like.png"
with the slash "/" at the beginning. Or better:
heart.src = "{% static 'network/like.png' %}"

JSONDecodeError at /update_item/ Expecting value: line 1 column 1 (char 0)

I’m a beginner. I have tried everything in the Django E-commerce website course, but it does not work for me. I also tried documentation but I didn’t get any solution. I have this error when I go to /update_item/ and the data is not showing up in the terminal:
Expecting value: line 1 column 1 (char 0)
error screenshot
tutorial link
tutorial link
https://youtu.be/woORrr3QNh8
cart.js
var updateBtns = document.getElementsByClassName('update-cart')
for (i = 0; i < updateBtns.length; i++) {
updateBtns[i].addEventListener('click', function(){
var productId = this.dataset.product
var action = this.dataset.action
console.log('productId:', productId, 'Action:', action)
console.log('USER:', user)
})
}
function updateUserOrder(productId, action){
console.log('User is authenticated, sending data...')
var url = '/update_item/'
fetch(url, {
method:'POST',
headers:{
'Content-Type':'application/json',
'X-CSRFToken':csrftoken,
},
body:JSON.stringify({'productId':productId, 'action':action})
})
.then((response) => {
return response.json();
})
.then((data) => {
location.reload()
});
}
views.py
def updateItem(request):
data = json.loads(request.body)
productId = data['productId']
action = data['action']
print("Action",action)
print("Pordutcs:",productId)
customer = request.user.customer
product = Product.objects.get(id=productId)
order, created = Order.objects.get_or_create(customer=customer , complete=False)
orderitem, created = Orderitem.objects.get_or_create(order= order,product=product)
if action == 'add':
orderitem.quantity = (orderitem.quantitiy +1)
elif action == 'remove':
orderitem.quantity = (orderitem.quantity -1)
orderitem.save()
if orderitem.quantity <= 0:
orderitem.delete()
return JsonResponse("Item was added", safe=False)
store.html
{% extends 'store/main.html' %}
{% load static %}
{% block content %}
<div class="row">
{%for i in products %}
<!-- {{i.image.url}} -->
<div class="col-lg-4">
<!-- <img class="thumbnail" src="{{i.image.url}}" alt="sorry"> -->
<img class="thumbnail" src="static{{i.imageURL}}">
<!-- {% static 'my_app/example.jpg' %} -->
<div class="box-element product">
<h6><strong>{{i.name}}</strong></h6>
<hr>
<button data-product="{{i.id}}" data-action='add' class="btn btn-outline-secondary add-btn updatecart">Add
to Cart</button>
<a class="btn btn-outline-success" href="#">View</a>
<h4 style="display: inline-block; float:right"><strong>Rs {{i.price|floatformat:2}}</strong></h4>
</div>
</div>
{% endfor %}
<!-- <img src="static/images/robot.jpg"> -->
</div>
{% endblock content %}

I tried making a dummy django project with the code you provided to see if I counter such error.
Following JS code I used:
function updateUserOrder(){
console.log('User is authenticated, sending data...')
var url = '/update_item/'
fetch(url, {
method:'POST',
headers:{
'Content-Type':'application/json',
},
body:JSON.stringify({'productId':5, 'action':'Add'})
})
.then((response) => {
return response.json();
})
.then((data) => {
location.reload()
});
}
I gave dummy data to productId and action.
Then my views.py goes like this:
from django.shortcuts import render
from django.http import JsonResponse
from django.views.decorators.csrf import csrf_exempt
#csrf_exempt
def updateItem(request):
data = json.loads(request.body)
productId = data['productId']
action = data['action']
print("Action",action)
print("Pordutcs:",productId)
return JsonResponse("Item was added", safe=False)
Not much with html part, it was just a click button to call the js code.
<button onclick="updateUserOrder()">Add</button>
And worked like a charm, following is the screenshot of my output in django server:
I would suggest you to try running with the same code.
If error is still there, try giving dummy data to productId and action in js code to make sure if there is a problem with the data in productId and action.

I assume you've solved this issue otherwise,...
if you're using Django version 4.0
change the url for the cart.js to update_item, cart.js should look like this
cart.js:
var updateBtns = document.getElementsByClassName('update-cart')
for (i = 0; i < updateBtns.length; i++) {
updateBtns[i].addEventListener('click', function(){
var productId = this.dataset.product
var action = this.dataset.action
console.log('productId:', productId, 'Action:', action)
console.log('USER:', user)
})
}
function updateUserOrder(productId, action){
console.log('User is authenticated, sending data...')
var url = 'update_item/'
fetch(url, {
method:'POST',
headers:{
'Content-Type':'application/json',
'X-CSRFToken':csrftoken,
},
body:JSON.stringify({'productId':productId, 'action':action})
})
.then((response) => {
return response.json();
})
.then((data) => {
location.reload()
});
}
then import csrf_exempt decorator , your views should look like this
views.py(after adding "from django.views.decorators.csrf import csrf_exempt" to the top of your file)
#csrf_exempt
def updateItem(request):
data = json.loads(request.body)
productId = data['productId']
action = data['action']
print("Action",action)
print("Pordutcs:",productId)
customer = request.user.customer
product = Product.objects.get(id=productId)
order, created = Order.objects.get_or_create(customer=customer , complete=False)
orderitem, created = Orderitem.objects.get_or_create(order= order,product=product)
if action == 'add':
orderitem.quantity = (orderitem.quantitiy +1)
elif action == 'remove':
orderitem.quantity = (orderitem.quantity -1)
orderitem.save()
if orderitem.quantity <= 0:
orderitem.delete()
return JsonResponse("Item was added", safe=False)
Then Clear Your Cache and try adding the item to cart again...it should work this time

Uploading crop image and form using cropperjs in Django

I am using https://github.com/fengyuanchen/cropper/blob/master/README.md as the cropper function. However, I want to submit field objects (in this case the title) and the cropped image. But I got an error on the admin. And of course, I have done the makemigrations and migrate before running the server
Error Picture
admin.py
from django.contrib import admin
from .models import Image
# Register your models here.
class ImageAdmin(admin.ModelAdmin):
pass
admin.site.register(Image, ImageAdmin)
models.py
from django.db import models
# Create your models here.
class Image(models.Model):
title = models.CharField(max_length=10)
image = models.ImageField(upload_to='images')
def __str__(self):
return str(self.pk)
forms.py
from django import forms
from .models import Image
class ImageForm(forms.Form):
image = forms.ImageField()
title = forms.CharField(
max_length=10,
widget=forms.TextInput(
attrs={
"class": "form-control",
"placeholder": "Title",
},
),
required=True
)
views.py
from django.shortcuts import render, redirect
from .models import Image
from .forms import ImageForm
from django.http import JsonResponse
from django.http import HttpResponseRedirect
def main_view(request):
form = ImageForm()
if request.method == "POST":
form = ImageForm(request.POST, request.FILES)
if form.is_valid():
addimage = Image(
title=form.cleaned_data['title'],
image = form.cleaned_data['image'],
)
addimage.save()
else:
form = ImageForm()
context = {'form': form}
return render(request, 'photo_list.html', context)
photo_list.html
{% extends "base.html" %}
{% block javascript %}
<script>
console.log("Hello");
const imageBox = document.getElementById("image-box");
const confirmButton = document.getElementById("confirm-button")
const input = document.getElementById("id_image");
const csrf = document.getElementsByName("csrfmiddlewaretoken")
const imageForm = document.getElementById("image-form")
input.addEventListener("change", () => {
console.log("change")
const img_data = input.files[0]
const url = URL.createObjectURL(img_data)
imageBox.innerHTML = `<img src="${url}" id="image" width="500px">`
var $image = $('#image');
$image.cropper({
aspectRatio: 16 / 9,
crop: function (event) {
console.log(event.detail.x);
console.log(event.detail.y);
console.log(event.detail.width);
console.log(event.detail.height);
console.log(event.detail.rotate);
console.log(event.detail.scaleX);
console.log(event.detail.scaleY);
}
});
// Get the Cropper.js instance after initialized
var cropper = $image.data('cropper');
confirmButton.addEventListener('click', () => {
cropper.getCroppedCanvas().toBlob((blob) => {
const fd = new FormData()
fd.append('csrfmiddlewaretoken', csrf[0].value)
fd.append('image', blob, 'my-image.png')
console.log("append pass")
$.ajax({
type: "POST",
url: imageForm.action,
enctype: 'multipart/form-data',
data: fd,
success: function (response) {
console.log(response)
},
error: function (error) {
console.log(error)
},
cache: false,
contentType: false,
processData: false,
})
})
})
});
</script>
{% endblock %}
{% block page_content %}
<form action="/cropimage/" id="image-form" method="POST">
{% csrf_token %}
{{form}}
{% comment %} <button class="btn" id="confirm-button"> confirm </button> {% endcomment %}
<input class="btn btn-lg btn-primary btn-block" type="submit" value="Submit" id="confirm-button">
</form>
<div id="image-box" class="mb-3"> </div>
{% endblock %}
I was following this tutorial https://www.youtube.com/watch?v=oWd7SAuCIRM
Basically, I am making an album of images recorded with title, but this time with cropperjs. Any solutions or suggestions would be appreciated :).

Ahh silly me, after a week of finding solutions, I finally realize that I did not put and after deleting some of the database cache.
fd.append('title', $("input[name='title']").val())
on the getCroppedCanvas()
For those who had the same problem, please..
Ref :
How to append more data in FormData for django?
OperationalError, no such column. Django
https://developer.mozilla.org/en-US/docs/Web/API/FormData/append

Passing Django model properties to JavaScript with the Fetch API

I'm working on an assignment to use the fetch API to do some of the normal things we would have Python do in our views with JavaScript such as adding records or querying the database. One issue I'm running across is passing the normal properties we would see in Django, say a user or username, where it just shows up as a literal user id when I pull it from the sql database with the fetch API. With the views, html and JavaScript I have written now, how would I go about pulling the username with fetch in JavaScript that I can normally grab with a variable or view with a print statement in the Django console, instead of just viewing the user id from the database. I feel like I'm missing a step and I'm just not seeing it.
urls
app_name = "network"
urlpatterns = [
path("", views.index, name="index"),
path("login", views.login_view, name="login"),
path("logout", views.logout_view, name="logout"),
path("register", views.register, name="register"),
# API Routes
path("addpost", views.post, name="post"),
path("<str:navbar_item>", views.viewposts, name="viewposts"),
]
models.py
class User(AbstractUser):
pass
class Profile(models.Model):
user = models.OneToOneField(User, null=True, on_delete=models.CASCADE)
bio = models.TextField(null=True, blank=True)
# pics
website = models.CharField(max_length=225, null=True, blank=True)
follower = models.ManyToManyField(
User, blank=True, related_name="followed_user") # user following this profile
# profile user that follows this profile
following = models.ManyToManyField(
User, blank=True, related_name="following_user")
def __str__(self):
return f"{self.user}'s' profile id is {self.id}"
def following_users(self):
for username in self.following:
return username
def get_absolute_url(self):
return reverse("network:profile-detail", args=[str(self.id)])
class Post(models.Model):
created_by = models.ForeignKey(User, on_delete=models.CASCADE, related_name="post_user")
body = models.TextField(max_length=1000)
timestamp = models.DateTimeField(auto_now_add=True)
likes = models.ManyToManyField(User, blank=True, related_name="post_likes")
def __str__(self):
return f"{self.created_by} posted {self.body}"
def get_absolute_url(self):
return reverse("network:post-detail", args=[str(self.id)])
def total_likes(self):
return self.likes.count()
class Meta:
ordering = ["-timestamp"]
views.py
def index(request):
if request.user.is_authenticated:
return render(request, "network/index.html", {})
else:
return HttpResponseRedirect(reverse("network:login"))
#login_required
def post(request):
# Composing a new post must be done via POST
if request.method != "POST":
return JsonResponse({"error": "You must POST your request."}, status=404)
try:
data = json.loads(request.body)
body = data.get("body", "")
user = request.user
print(user)
post = Post(created_by=user, body=body)
# post = Post(created_by=Profile.objects.get(user=user), body=body)
post.save()
except AttributeError:
return JsonResponse({"error": "AttributeError thrown."}, status=500)
return JsonResponse({"message": "Post created."}, status=201)
#login_required
def viewposts(request, navbar_item):
if navbar_item == "viewposts":
posts = Post.objects.all()
posts = posts.order_by("-timestamp")
json_post = serialize("json", posts)
print(posts)
return HttpResponse(json_post, content_type="application/json")
else:
return JsonResponse({"error": "Invalid page."}, status=400)
index.html
{% extends "network/layout.html" %}
{% load static %}
{% block body %}
<div class="container p-5">
{% if error %}
{{ error }}
{% endif %}
<h1 class="display-4">All Posts</h1>
<div class="form-group border rounded p-4">
<h2 class="diplay-3">New Post</h2>
<form id="addpost" class="form-group pt-5">
{% csrf_token %}
<div class="form-group">
<textarea class="form-control" id="body" placeholder="Add post here..."></textarea>
</div>
<input type="submit" class="btn btn-primary"/>
</form>
</div>
<div id="all-posts" class="all-posts">
</div>
</div>
{% endblock %}
{% block script %}
<script src="{% static 'network/main.js' %}"></script>
{% endblock %}
JavaScript
// Post on index page # API Routes /addpost
const addPost = () => {
const addPostUrl = '/addpost';
const csrftoken = getCookie('csrftoken');
const body = document.querySelector('#body').value;
// body needs to be passed into an object before using the stringify method
const bodyObject = { body };
fetch(addPostUrl, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'X-CSRFToken': csrftoken,
},
body: JSON.stringify(bodyObject)
})
.then(response => response.json())
.then(result => {
console.log(result);
})
.catch(error => {
console.log(error);
});
return false;
};
// Load posts in index page # API Routes /navbar_item
function loadPosts(navItem, event) {
preventPageLoad(event);
const postUrl = `/${navItem}`;
// Send a GET request to the URL to retrieve all posts
fetch(postUrl)
.then(response => response.json())
.then(data => {
data.forEach(post => {
const { fields } = post;
const allPostsContainer = document.querySelector("#all-posts");
const element = document.createElement('div');
const postId = `#post-${fields.id}`;
element.style.textDecoration = 'none';
element.classList.add('HoverClass1');
element.setAttribute('id', `post-${fields.id}`);
element.classList.add('d-flex', 'flex-column' ,'justify-content-between', 'p-4', 'm-3', 'lead', 'border', 'rounded');
element.style.color = '#000000';
element.innerHTML =
// This is returning an id
`<div class="bd-highlight font-weight-bolder mr-5">${fields.created_by}</div>
<div class="bd-highlight">${fields.timestamp}</div>
<div class="flex-fill bd-highlight">${fields.body}</div>`;
console.log(fields);
allPostsContainer.append(element);
const linePost = document.querySelector(postId);
linePost.addEventListener('click', (event) => {
console.log(event);
});
});
})
.catch(error => {
console.log(error);
});
return false;
}
Images showing my admin console in Django versus the browser console and what fetch is pulling in JavaScript. You'll see in the admin console we can view the username, but in the browser console all I'm getting is the user id with fetch.

I figured out how to do this. I added a serialize method to the Post model to convert these properties to JSON.
def serialize(self):
return {
'id': self.id,
'created_by': self.created_by.username,
'body': self.body,
'timestamp': self.timestamp.strftime('%b %-d %Y, %-I:%M %p'),
'likes': self.total_likes()
}
Then in views.py, in my viewposts function, instead of my the HttpResponse, I used JsonResponse and passed the model's serialize method as an argument.
#login_required
def viewposts(request, navbar_item):
if navbar_item == "viewposts":
posts = Post.objects.all()
posts = posts.order_by("-timestamp")
return JsonResponse([post.serialize() for post in posts], safe=False)
else:
return JsonResponse({"error": "Invalid page."}, status=400)
This allowed me to not have to deconstruct anything in my JavaScript file. So I could pull any attributes from my query using dot notation directly off of the data model in fetch.