I want to send POST request to view function. Now I am getting 500 error. I could not figure out where is the problem. The view function is receiving POST request but not returning any data.
EDIT: Now problem with 500 error solved. But how should I return form for editing object?
Template:
function getCookie(name) {
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
var csrftoken = getCookie('csrftoken');
function editParticipant(event_id, row_id){
var postdata = {
'csrfmiddlewaretoken': csrftoken
}
$.post( "/edit-participant-" + event_id + "/", postdata, function( data ) {
console.log(data);
});
}
View:
def edit_participant(request, participant_id):
participant = Participant.objects.get(pk=participant_id)
form = RegisterToEvent(request.POST or None, instance = participant)
if form.is_valid():
form.save()
return HttpResponseRedirect('/event-%s' %2)
data = {'form': form}
return JsonResponse(data)
URL:
url(r'^edit-participant-(?P<participant_id>[0-9]+)/$', 'event.views.edit_participant', name='edit_participant'),
Your view doesn't return a response
def edit_participant(request, participant_id):
return JsonResponse({'data':"Test"})
You should also turn on debug in the settings by setting DEBUG to true, it will tell you exactly what the error is, just remember to turn this off before production. You can also implement error logging.
There isn't anything about this function that needs to use ajax requests. If you want to keep the same page if the form isn't valid, then just return the form errors and do something with them
data = { 'errors': form.errors }
But this doesn't make much sense to me when you can just load the page again with a form and let django do it for you with its form rendering.
return render(request, 'yourhtml.html', {form: form})
Related
I'm trying to create a website based on guides. When it came to updating the basket through the buttons (decrease and increase), then trying to click on them, errors are issued: Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0, which refers to
.then((data) => {
location.reload()
});
cart.js:24 POST http://127.0.0.1:8000/update_item/ 500 (Internal Server Error)
which refers to
fetch(url, {
method:'POST',
headers:{
'Content-Type':'application/json',
'X-CSRFToken': csrftoken,
},
and i have error in console pycharm line 104, in updateItem
productId = data['productId']
KeyError: 'productId'
code cart.js:
var updateBtns = document.getElementsByClassName('update-cart')
for (i = 0; i < updateBtns.length; i++) {
updateBtns[i].addEventListener('click', function () {
var productId = this.dataset.stuff
var action = this.dataset.action
console.log('productId:', productId, 'Action:', action)
console.log('USER:', user)
if (user == 'AnonymousUser') {
console.log('User is not authenticated')
} else {
updateUserOrder(productId, action)
}
})
}
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('Product:', productId)
customer = request.user.customer
product = Stuff.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.quantity + 1)
elif action == 'remove':
orderItem.quantity = (orderItem.quantity - 1)
orderItem.save()
if orderItem.quantity <= 0:
orderItem.delete()
return JsonResponse('Item was added', safe=False)
Thank you in advance
What is your Python version?
From Python v3.0, json.loads() will only accept unicode string.
Maybe the problem is that you have to decode request.body first :
data = json.loads(request.body.decode('utf-8'))
If this is not the problem try to check what you are receiving. Because the "<" character looks like html or xml. For example, change your function to:
def updateItem(request):
data = json.loads(request.body)
return HttpResponse(data)
I have a model that references other models, I am trying to save data using ajax
Example:
class Friend(models.Model):
name = ...
class Main(models.Model):
name = ....
friend = models.ForeignKey(Friend, on_delete=models.CASCADE)
All body comes from ajax(fetch) request
I have a table (html), and add data to cells, then with the
enter event, send data.
Like this:
input.addEventListener("keyup", function (e) {
//in this scenario I already have the whole row
// get full_row `row_data`
post_ajax = {
method: "POST",
headers: {
"X-CSRFToken": crf_token, // I get it with a regular expression
"Content-Type": "application/json",
"X-Requested-With": "XMLHttpRequest",
Accept: "application/json",
},
body: JSON.stringify(row_data),
};
fetch("my_url", post_ajax)
.then((res) => res.json())
.catch((error) => console.error("Error:", error))
.then((response) => console.log("Success:", response));
});
My view function
def save_post(request):
if request.is_ajax and request.method == "POST":
body_unicode = request.body.decode('utf-8')
data = json.loads(body_unicode)
print('here the data arrives',data)
# here the data arrives {'name': 'Ale', 'friend_id': 22}
Main.objects.create(name=data['name'], friends=data['friend_id'])
return JsonResponse({"instance": data}, status=200)
return JsonResponse({"error": ""}, status=400)
This is the error
raise TypeError("%s() got an unexpected keyword argument '%s'" %
(cls.__name__, kwarg))
TypeError: Main() got an unexpected keyword argument 'Friends'
Any idea or suggestion?
EDIT:
When you are creating the Main object, try making the "friend" attribute an object, like this:
friend = Friend.objects.get(id=data['friend_id'])
Main.objects.create(name=data['name'], friend=friend)
Also, the main issue appears to be you are calling the column "friends" but it should be "friend" when you are creating the Main object.
This:
Main.objects.create(name=data['name'], friends=data['friend_id'])
Should be:
Main.objects.create(name=data['name'], friend=data['friend_id'])
PREVIOUS ANSWER:
Assuming you are using JQuery in the template to send an AJAX request, since you did not specify.
In your urls.py:
...
path('/api/post_friend/', post_friend_api, name="post_friend_api"),
...
In your template :
<script type="text/javascript">
$("#myBurron").click(function(){
var csrfToken = $( "input[name='csrfmiddlewaretoken']"); // assuming this is a form
var friend_name = $("#friend_name").val();
$.ajax({ url: '{% url 'post_friend_api' %}',
type: "POST",
dataType: "json",
data: {'friend':friend_name, 'csrfmiddlewaretoken':csrfToken.val()},
cache: false
}).done(function(data) {
if (data.result === true){
alert(data.message);
}
});
});
});
</script>
In your views.py:
from django.http import JsonResponse
def post_friend_api(request):
data = {}
if request.POST.get('friend', None) is not None:
friend_name = request.POST.get('post_note')
# save the object and indicate success
data['result'] = True
data['message'] = "Friend saved successfully"
...
if request.is_ajax():
return JsonResponse(data)
else:
return HttpResponseBadRequest()
When you are sending data via POST don't forget to pass along your CSRF token as in the example above. This assumes you have a form on the page you can get it from, otherwise you can use something like this to get it:
function getCookie(name) {
var cookieValue = null;
if (document.cookie && document.cookie !== '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = cookies[i].trim();
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) === (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
var csrftoken = getCookie('csrftoken');
If you don't want to deal with the CSRF token, you can mark the view with the #csrf_exempt decorator and remove the 'csrfmiddlewaretoken' data element from the Ajax call in the template, but it may not be ideal or the most secure. An example of that:
from django.views.decorators.csrf import csrf_exempt
from django.http import JsonResponse
#csrf_exempt()
def post_note_api(request):
...
If you post more details I can update my answer.
I have problem with take value from url (?site=value). When I had function in views.py it was work, but now I moved this to another file. Can someone solve this problem?
functionAjax.py:
def htmlMain(request):
if request.is_ajax and request.method == "POST":
UrlCut = request.GET.get('site','Main')
Messages = NewsMessage.objects.all().order_by('-Data').values()
context = {
"Messags" : Messages
}
return render(request, 'ajax'+UrlCut+'.html', context)
AjaxFunction.js:
$.urlParam = function(name){
var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
if (results==null){
return null;
}
else{
return results[1] || 0;
}
}
let tech = ""
if($.urlParam('site') != null)
{
tech = "?site=" + $.urlParam('site');
}
UrlSet = "/get/ajax/validate/MainSite"+tech;
$.ajax({
url: UrlSet,
data: $('#FormSite').serialize(),
type: "POST",
async:false,
success: function(response) {
$("#AjaxChange").replaceWith(response);
},
error: function(data)
{
alert('Bad connection');
console.log(data);
}
});
use 'Site' instead of 'site' to get Site=value
UrlCut = request.GET.get('Site', 'Main')
I have a function in Django that I am trying to solve from my previous question here. While trying out my own solutions, I have made significant updates but I encounter an error.
I'm trying this out right now:
def view_routes(request, query=None):
routes = None
if query is None:
routes = Route.objects.all()
else:
#View: Routes in Queried Boundary
if request.method == 'POST':
return HttpResponse("OK")
elif request.method == 'GET':
json_feature = json.loads(request.GET.get('geo_obj', False))
#json_feature = json.loads(request.GET['geo_obj'])
geom = make_geometry_from_feature(json_feature)
routes = Route.objects.filter(wkb_geometry__within=geom[0])
print("Total Routes Filtered: " + str(Route.objects.filter(wkb_geometry__within=geom[0]).count()))
#Render to Django View
routes_json = serialize('geojson', routes, fields=('route_type', 'route_long', 'route_id', 'wkb_geometry',))
routes_geojson = json.loads(routes_json)
routes_geojson.pop('crs', None)
routes_geojson = json.dumps(routes_geojson)
#return render(request, 'plexus/view_routes.html', {'routes':routes})
return redirect('routes_view', query)
I am having trouble switching/commenting out between these two lines:
json_feature = json.loads(request.GET.get('geo_obj', False))
json_feature = json.loads(request.GET['geo_obj'])
Both presents an error respectively:
TypeError: the JSON object must be str, not 'bool'
django.utils.datastructures.MultiValueDictKeyError: "'geo_obj'"
Edited function with AJAX inside:
function sendQueryData(url, query){
url =url.replace('query' , query);
if (query === ""){
alert("City Input Required");
}else{
if(geo_obj === null){
alert("Click Search Button...")
}else{
$.ajax({
beforeSend: function(xhr, settings) {
if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
xhr.setRequestHeader("X-CSRFToken", csrftoken);
}
},
type: "GET",
url: url,
dataType: 'html',
data: {
'geo_obj' : JSON.stringify(geo_obj)
},
success: function(data){
alert(data);
window.location.href = url;
//var result = $('<div />').append(data).find('#list-group').html();
//$('#list-group').html(result);
},
error: function(xhr, textStatus, errorThrown) {
alert('Request Failed' + textStatus + ":" + errorThrown);
}
});
}
}
}
Try using json.loads(request.body) if you are passing raw JSON, request.GET['foo'] is for form-encoded data
In my Django project, I have set up pyfacebook & django-facebookconnect to let the user login with their Fb account. However I now need to get the right permissions to get the user's data & save it in my db.
How do you add the permissions to pyfacebook & django-facebookconnect?
In facebook.init.py there is this function which I think is where I need to change the scope somehow.
Thanks for the help!
def get_login_url(self, next=None, popup=False, canvas=True,
required_permissions=None):
"""
Returns the URL that the user should be redirected to in order to login.
next -- the URL that Facebook should redirect to after login
required_permissions -- permission required by the application
"""
if self.oauth2:
args = {
'client_id': self.app_id,
'redirect_uri': next,
}
if required_permissions:
args['scope'] = required_permissions
if popup:
args['display'] = 'popup'
return self.get_graph_url('oauth/authorize', **args)
else:
args = {'api_key': self.api_key, 'v': '1.0'}
if next is not None:
args['next'] = next
if canvas is True:
args['canvas'] = 1
if popup is True:
args['popup'] = 1
if required_permissions:
args['req_perms'] = ",".join(required_permissions)
if self.auth_token is not None:
args['auth_token'] = self.auth_token
return self.get_url('login', **args)
Update:
When you click the connect button, it passes facebookConnect:
<script type="text/javascript">
FB_RequireFeatures(["XFBML"], function() {FB.Facebook.init("{{ facebook_api_key }}", "{% url facebook_xd_receiver %}")});
function facebookConnect(loginForm) {
FB.Connect.requireSession();
FB.Facebook.get_sessionState().waitUntilReady(function(){loginForm.submit();});
}
function pushToFacebookFeed(data){
if(data['success']){
var template_data = data['template_data'];
var template_bundle_id = data['template_bundle_id'];
feedTheFacebook(template_data,template_bundle_id,function(){});
} else {
alert(data['errors']);
}
}
function pushToFacebookFeedAndRedirect(data){
if(data['success']){
var template_data = data['template_data'];
var template_bundle_id = data['template_bundle_id'];
feedTheFacebook(template_data,template_bundle_id,function(){window.location.href=template_data['url'];});
} else {
alert(data['errors']);
}
}
function pushToFacebookFeedAndReload(data){
if(data['success']){
var template_data = data['template_data'];
var template_bundle_id = data['template_bundle_id'];
feedTheFacebook(template_data,template_bundle_id,function(){window.location.reload();});
} else {
alert(data['errors']);
}
}
function feedTheFacebook(template_data,template_bundle_id,callback) {
FB.Connect.showFeedDialog(
template_bundle_id,
template_data,
null, null, null,
FB.RequireConnect.promptConnect,
callback
);
}
</script>
xd_receiver calls:
<script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/XdCommReceiver.debug.js" type="text/javascript">
</script
Ultimately, I switched over to the django socialregistration module & that worked great.