Django 500 error ajax

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#10841 closed New feature (fixed)

Better 500 template for AJAX calls

Description

Currently it’s quite hard to debug errors raised during ajax calls because of full 500 page being returned. This diff adds simple 500 page, it’s pretty close to code for pasting to dpaste but with additional GETPOSTMETAFILESSettings lists and error summary moved to top. Simple check to self.request.is_ajax() is made to select template to use.

As for me, it’s much easier to use tools like Firebug with this patch.

Attachments (6)

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Change History (38)

Changed 14 years ago by Riz

Note that you can use ​ DEBUG_PROPAGATE_EXCEPTIONS to get simple traceback.

I don’t think that DEBUG_PROPAGATE_EXCEPTIONS will help. I want django to handle exceptions and provide all info like GETPOST vars, just do it differently in ajax and non ajax cases. And I want to have normal 500 page for non ajax calls.

Changed 14 years ago by Michail Sychev

turned off autoescaping for some fields

New patch, some cleanups.

I think some other templates should have ajax support, like comment’s 400 page. But I am not completly sure about it, I use mptt comments which have ajax posting support and having ajax 400 page is very useful. But afaik django default comment system don’t have direct ajax support. Any suggestions?

Why not make the AJAX 500 template be valid JSON? Then it’d be easy for clients to programatically figure out what went wrong.

comment:5 Changed 14 years ago by Alexander Koshelev

Making it JSON is a nice idea ( maybe with combination of checking «accept» headers ) but afaik when you have 500 error it usually means that something really wrong happend and it’s outside the frontendjavascript app logic (syntax error for example, or integrity error), not to note that you need debug 500 page only during development time and adding special logic just for debug time looks like an overkill. So my main point was to make it easy to read by developer, as ( usually ) special logic at javascript side for 500 error page will not exist.

This issue is a frustration for everyone doing AJAX with Django. I hope this gets fixed.

I don’t think errors should be returned as a broken-apart JSON string. It would make testing with curl, etc. harder, and it doesn’t seem useful for clients to try to figure out why the server crashed.

I could see a case for wrapping the entire templated error into JSON, but I think it’s simpler for the client to just assume that 500 errors return plaintext, and do something like:

. to display errors in the page, even when the normal response is JSON.

Another point why JSON is bad idea — when you wrap string into JSON all non ascii characters get encoded, which makes it unreadable for normlal user.

Here’s a new version which moves the AJAX test to the technical_500_response and returns the correct mime type (I also tidied up the new text version of the template and refactored the html/text traceback generation).

Changed 14 years ago by Chris Beaven

(i’m accepting as a reminder for me to raise the issue after 1.1 lands)

Changed 14 years ago by Chris Beaven

I think this ticket can be closed now as new versions of firebug has «HTML» tab for viewing ajax responses.

I’m sorry but I personally use Safari/Chrome more often for web development than Firefox, also to inspect AJAX responses.
Does that infer that only Firefox+Firebug are considered as acceptable for development?

I’m absolutely agree with RaceCondition

I am pretty sure that this ticket will not make into Django(lol, it’s been a year since first patch) and I have nothing against Chrome/Safari(I had no idea that it can debug AJAX calls to be honest). But now we need a better patch which will server normal html 500 pages to firebug and plain text to other browsers. 🙂

Yes, the ticket is a year old — but then, nobody has raised the issue on Django-developers to try and get the design issue resolved, either. Nothing ever gets added to trunk unless somebody makes it happen.

After looking at headers which firefox send I can seen no way to check for firebug, so we either need to check for firefox and enable full html listing only for it or limit it to text for every browser. Both solutions doesn’t seem nice to me, so, any suggestions?

This ticket was discussed in django-developers, btw.

By default, failed AJAX requests should give plain-text errors, because very often they’re not being viewed in a browser at all. Half of the benefit of the whole mechanism is that I can test it outside of the complexities of whatever HTML interface is using it, by assembling queries with curl. If that fails, it should give messages I can read without having to dump them to a file and load them in a browser (or squint painfully at in a pager, which is what I usually end up doing).

It’s nice that some browser tools give a way to view past AJAX responses, but it doesn’t change this issue at all.

I would love to see JSON in the response, instead of plain text or HTML.
This is what ASP.NET also does, and it works really nice in practice.

Some of the fields could be:

The JavaScript developer can choose whether to show a message, or dump the stracktrace at the console.
Dumping a text/HTML message to the output makes it really hard to do something sane from the JavaScript side of things.

I’ve seen a very nice implementation of something similar to it from Google on their Google Vizualization tools.
Check this out

It’s simliar to waht vdboor suggested.

Источник

Ajax-запрос к Django возвращает 500 внутренних ошибок сервера

Я m pretty new in Django and I пытаюсь собрать данные с помощью Ajax. Кроме того, я хотел бы добавить, что я m trying to make and edit quiz app from tutorial(so I делаю это по учебнику, а не с нуля.

Я вижу, что путь неправильный, он должен быть: http://127.0.0.1:8000/1/, not http://127.0.0.1:8000/1/data. Но изменение от:

У меня также есть ошибка из терминала:

Traceback (последний последний вызов): Файл «/home/ad/Documents/myvenv/lib/python3.8/site-packages/django/core/handlers/exception.py», строка 34, в inner response = get_response(request) Файл «/home/ad/Documents/myvenv/lib/python3.8/site-packages/django/core/handlers/base.py», строка 115, в _get_response response = self.process_exception_by_middleware(e, request) Файл «/home/ad/Documents/myvenv/lib/python3.8/site-packages/django/core/handlers/base.py», строка 113, в _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File «/home/ad/Documents/test01/src/quizes/views.py», line 20, in quiz_data_view для q в quiz.get_questions(): File «/home/ad/Documents/test01/src/quizes/models.py», line 22, in get_questions return self.question_set.all[:self.number_of_questions] TypeError: ‘method’ object is not subscriptable

Но я понятия не имею, что можно изменить в quizes/models.py:

или quizes/views.py:

Можете ли вы помочь мне с некоторыми идеями?

Источник

Исключения¶

Исключения… позволяют чисто организовать обработку ошибок в центральном или высокоуровневом месте в структуре программы.

‒ Doug Hellmann, Python Exception Handling Techniques

Обработка исключений в представлениях фреймворка REST¶

Представления фреймворка REST обрабатывают различные исключения и возвращают соответствующие ответы на ошибки.

Обрабатываемыми исключениями являются:

Подклассы APIException , поднятые внутри фреймворка REST.

Исключение Django Http404 .

Исключение Django PermissionDenied .

В каждом случае фреймворк REST возвращает ответ с соответствующим кодом состояния и типом содержимого. В теле ответа будут содержаться любые дополнительные сведения о характере ошибки.

Большинство ответов на ошибки будут содержать ключ detail в теле ответа.

Например, следующий запрос:

Может быть получен ответ об ошибке, указывающий на то, что метод DELETE не разрешен на данном ресурсе:

Ошибки валидации обрабатываются несколько иначе, и в качестве ключей в ответе будут указаны имена полей. Если ошибка валидации не относится к конкретному полю, то будет использован ключ «non_field_errors» или любое строковое значение, установленное для параметра NON_FIELD_ERRORS_KEY .

Пример ошибки валидации может выглядеть следующим образом:

Пользовательская обработка исключений¶

Вы можете реализовать пользовательскую обработку исключений, создав функцию-обработчик, которая преобразует исключения, возникающие в представлениях вашего API, в объекты ответа. Это позволит вам контролировать стиль ответов на ошибки, используемый вашим API.

Функция должна принимать пару аргументов, первый из которых — обрабатываемое исключение, а второй — словарь, содержащий любой дополнительный контекст, например, обрабатываемое в данный момент представление. Функция обработчика исключения должна либо вернуть объект Response , либо вернуть None , если исключение не может быть обработано. Если обработчик возвращает None , то исключение будет повторно поднято и Django вернет стандартный ответ HTTP 500 „server error“.

Например, вы можете захотеть убедиться, что все ответы на ошибки включают код состояния HTTP в теле ответа, например, так:

Чтобы изменить стиль ответа, вы можете написать следующий пользовательский обработчик исключений:

Аргумент context не используется обработчиком по умолчанию, но может быть полезен, если обработчику исключения нужна дополнительная информация, например, обрабатываемое в данный момент представление, доступ к которому можно получить в виде context[‘view’] .

Обработчик исключений также должен быть настроен в ваших настройках, используя клавишу настройки EXCEPTION_HANDLER . Например:

Если параметр ‘EXCEPTION_HANDLER’ не указан, то по умолчанию используется стандартный обработчик исключений, предоставляемый фреймворком REST:

Обратите внимание, что обработчик исключений будет вызываться только для ответов, сгенерированных поднятыми исключениями. Он не будет использоваться для любых ответов, возвращаемых непосредственно представлением, например, ответов HTTP_400_BAD_REQUEST , которые возвращаются общими представлениями при неудачной проверке сериализатора.

Справочник по API¶

APIException¶

Подпись: APIException()

базовый класс для всех исключений, возникающих внутри класса APIView или @api_view .

Чтобы обеспечить пользовательское исключение, подкласс APIException и установите атрибуты .status_code , .default_detail , и default_code на класс.

Например, если ваш API полагается на сторонний сервис, который иногда может быть недоступен, вы можете захотеть реализовать исключение для кода ответа HTTP «503 Service Unavailable». Это можно сделать следующим образом:

Проверка исключений API¶

Существует ряд различных свойств, доступных для проверки состояния исключения API. Вы можете использовать их для создания пользовательской обработки исключений в вашем проекте.

Доступными атрибутами и методами являются:

.detail — Возвращает текстовое описание ошибки.

.get_codes() — Возвращает идентификатор кода ошибки.

.get_full_details() — Возвращает как текстовое описание, так и идентификатор кода.

В большинстве случаев деталь ошибки будет простым элементом:

В случае ошибок валидации деталь ошибки будет представлять собой список или словарь элементов:

ParseError¶

Подпись: ParseError(detail=None, code=None)

Возникает, если запрос содержит неправильно сформированные данные при доступе к request.data .

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «400 Bad Request».

AuthenticationFailed¶

Подпись: AuthenticationFailed(detail=None, code=None)

Возникает, когда входящий запрос содержит неправильную аутентификацию.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «401 Unauthenticated», но оно также может привести к ответу «403 Forbidden», в зависимости от используемой схемы аутентификации. Более подробную информацию см. в authentication documentation .

NotAuthenticated¶

Подпись: NotAuthenticated(detail=None, code=None)

Возникает, когда неаутентифицированный запрос не прошел проверку на разрешение.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «401 Unauthenticated», но оно также может привести к ответу «403 Forbidden», в зависимости от используемой схемы аутентификации. Более подробную информацию см. в authentication documentation .

PermissionDenied¶

Подпись: PermissionDenied(detail=None, code=None)

Возникает, когда аутентифицированный запрос не прошел проверку на разрешение.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «403 Forbidden».

NotFound¶

Подпись: NotFound(detail=None, code=None)

Возникает, когда ресурс не существует по заданному URL. Это исключение эквивалентно стандартному исключению Django Http404 .

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «404 Not Found».

MethodNotAllowed¶

Подпись: MethodNotAllowed(method, detail=None, code=None)

Возникает, когда происходит входящий запрос, который не сопоставлен с методом-обработчиком на представлении.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «405 Method Not Allowed».

Неприемлемо¶

Подпись: NotAcceptable(detail=None, code=None)

Возникает, когда поступает запрос с заголовком Accept , который не может быть удовлетворен ни одним из доступных рендереров.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «406 Not Acceptable».

Подпись: UnsupportedMediaType(media_type, detail=None, code=None)

Возникает, если при обращении к request.data нет парсеров, способных обработать тип содержимого данных запроса.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «415 Unsupported Media Type».

Дросселированный¶

Подпись: Throttled(wait=None, detail=None, code=None)

Возникает, когда входящий запрос не проходит проверку на дросселирование.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «429 Too Many Requests».

ValidationError¶

Подпись: ValidationError(detail, code=None)

Исключение ValidationError несколько отличается от других классов APIException :

Аргумент detail является обязательным, а не опциональным.

Аргумент detail может представлять собой список или словарь сведений об ошибках, а также может быть вложенной структурой данных. Используя словарь, вы можете указать ошибки на уровне полей при выполнении проверки на уровне объектов в методе validate() сериализатора. Например. raise serializers.ValidationError(<‘name’: ‘Please enter a valid name.’>)

По соглашению вы должны импортировать модуль serializers и использовать полностью квалифицированный стиль ValidationError , чтобы отличить его от встроенной ошибки валидации Django. Например. raise serializers.ValidationError(‘This field must be an integer value.’)

Класс ValidationError следует использовать для сериализатора и валидации полей, а также классами валидаторов. Он также возникает при вызове serializer.is_valid с аргументом ключевого слова raise_exception :

Общие представления используют флаг raise_exception=True , что означает, что вы можете переопределить стиль ответов на ошибки валидации глобально в вашем API. Для этого используйте пользовательский обработчик исключений, как описано выше.

По умолчанию это исключение приводит к ответу с кодом состояния HTTP «400 Bad Request».

Общие представления ошибок¶

Django REST Framework предоставляет два представления ошибок, подходящих для предоставления общих JSON 500 Server Error и 400 Bad Request ответов. (Стандартные представления ошибок Django предоставляют ответы в формате HTML, что может не подойти для приложения, использующего только API).

rest_framework.exceptions.server_error ¶

Возвращает ответ с кодом состояния 500 и типом содержимого application/json .

Установить как handler500 :

rest_framework.exceptions.bad_request ¶

Возвращает ответ с кодом состояния 400 и типом содержимого application/json .

Источник

I’m trying to send an AJAX request from my template that takes you to a url and runs the view function. However, I’m getting a 500 Error in my console. The error in Django log says: TypeError: delete_appointment() missing 1 required positional argument: 'appointment_id' My view is also using a custom decorator, all required code is below:

Decorator

def user_has_delete(func, redirect_url="Home:Deny"):
    def wrapper(request, *args, **kwargs):
        if request.user.is_anonymous:
            return redirect(redirect_url)
        if request.user.is_authenticated:
            if not request.user.is_denier:
                return redirect(redirect_url)
            else:
                return func(request, *args, **kwargs)
    return wrapper

URL Pattern

path('Vet/DenyAppointment/<int:appointment_id>', views.delete_appointment)

View

@user_has_delete
@never_cache
def delete_appointment(request, appointment_id):
    appointment = get_object_or_404(Appointments, pk=appointment_id)
    appointment.delete()
    return redirect('Dashboard')

Template Portion

{% for appointment in appointments %}
                        <div class="col-sm-12 col-lg-8 AppointmentDiv offset-sm-0 offset-lg-2 Space-b-sm">
                            <h2>{{ appointment.fullDate }}</h2>
                                <ul>
                                    <li>{{ appointment.title }}</li>
                                    <li>{{ appointment.day }}</li>
                                </ul>
                            <button type="submit" class="theme" id='{{ appointment.id }}' onclick="deleteAppointment({{ appointment.id }})">Delete Appointment</button>
                        </div>
                    {% endfor %}

AJAX

<script>
            function deleteAppointment(appointmentId) {
                $.ajax({
                    url: '/Vet/DenyAppointment/' + appointmentId,
                    type: 'GET',
                    success: function(response) {
                        window.location.href = "/Dashboard";
                    }
                });
            }
        </script>

1. Вам нужно в Вашего шаблона, который выводится на страницу, включить тег {% csrf token %}
2. Также нужно, чтобы при загрузке страницы срабатывал вот этот скрипт:

(function(G) {
	"use strict";
	var $ = G.jQuery;

	function csrfSafeMethod(method) {
		return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
	}
	function sameOrigin(url) {
		var host = document.location.host, // host + port
		    protocol = document.location.protocol,
		    sr_origin = '//' + host,
		    origin = protocol + sr_origin;
		// Allow absolute or scheme relative URLs to same origin
		return (url == origin || url.slice(0, origin.length + 1) == origin
				+ '/')
				|| (url == sr_origin || url.slice(0, sr_origin.length + 1) == sr_origin
						+ '/') ||
				!(/^(//|http:|https:).*/.test(url));
	}
	$.ajaxSetup({
		beforeSend : function(xhr, settings) {
			if (!csrfSafeMethod(settings.type) && sameOrigin(settings.url)) {
				xhr.setRequestHeader("X-CSRFToken", $.cookie('csrftoken'));
			}
		}
	});
}(this));

3. Комментировать middleware csrf_token не надо. Вы уж будьте последовательны — если делаете CSRF, так делайте до конца.
4. Ваш вид лучше написать так:

@csrf_protect #Защищать так защищать
def email_check(request):
    if request.method == "POST":
        post_email = request.POST.get("email")
        user_by_email = User.objects.get(email=post_email)
        if user_by_email is not None: #Такой email уже использован
            return HttpResponse(json.dumps({"success": False, "error": "Пользователь с таким email уже зарегистрирован"}), content_type="application/json")
        else: #E-mail свободен
            return HttpResponse(json.dumps({"success": True}), "application/json")

Я пытаюсь просто обновить значение логической формы, используя функцию ajax для ее обновления, потому что я хочу, чтобы она перезагружалась, но в любом случае я проверил, что передаю csrf_token и убедился, что это не проблема. Я думал, что это проблема с моим urls.py, но я не уверен, что это такое.

Что я могу сделать, чтобы исправить эту ошибку?

heres my views.py для формы ajax, note: project_complete — это булевское поле в моей модели

@login_required
def ProjectDetailToDoCForm(request):
    form = ProjectToDoCForm(request.POST or None)
    if form.is_valid() and request.is_ajax():
        args = {}
        args.update(csrf(request))
        ajaxVal = request.POST.get('booleanValue')
        args['doneBool'] = ajaxVal.project_complete
        return HttpResponse(json.dumps(args), content_type="application/json")

Javascript

<script type="text/javascript">
    $(document).on("submit", "#project_edit_date", function(e){
        e.preventDefault();
        updateForm();
    });

    function updateForm() {

        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]);
                if (cookie.substring(0, name.length + 1) == (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }  

        $.ajaxSetup({
            beforeSend: function(xhr, settings) {
                if (!(/^http:.*/.test(settings.url) || /^https:.*/.test(settings.url))) {
                    // Only send the token to relative URLs i.e. locally.
                    xhr.setRequestHeader("X-CSRFToken", getCookie('csrftoken'));
                }
            }
        });

        $.ajax({
            url: "{% url 'projects:todoc_form' %}",
            type: "POST",
            datatype: "json",
            data: {booleanValue : $("#id_project_complete").val()},

            "beforeSend": function(xhr, settings) {
                console.log("Before Send");
                $.ajaxSettings.beforeSend(xhr, settings);
            },

            success: function(json){
              console.log(json);
              console.log("success");
            },

            error:function(xhr,errmsg,err){
                console.log(err);
            }
        });
    }
</script>

форма

<form action="" method="post" id="project_edit_date">{% csrf_token %}
   <label for="todoc">Task Done?</label>
   <span name="todoc" id="check_done">   {{todocform.project_complete}}</span>
   <button type="submit" id="project_edit_button">
        <span>Update</span>
   </button>
</form>   

urls.py

urlpatterns = patterns('',
    url(r'^$', views.ProjectView.as_view() , name='project'),
    url(r'^create/$', views.createproject, name='create'),
    url(r'^edit/(?P<slug>[w-]+)/$', views.ProjectDetail.as_view(), name='indproject'),
    url(r'^view/(?P<slug>[w-]+)/$', views.ProjectDetailPublic.as_view(), name='pproject'),
    url(r'^form/(?P<slug>[w-]+)/$', require_POST(ProjectDetailForm.as_view()), name='indproject_form'),
    url(r'^update/(?P<slug>[w-]+)/$', require_POST(ProjectDetailToDoForm.as_view()), name='todo_form'),
    url(r'^complete/$', ProjectDetailToDoCForm, name='todoc_form'),
)

In this post, we will see How To Fix – “HTTP 500 Server Error” When Setting DEBUG = False in Django. How the error might look like in the terminal or application. You might also find this error when you upgrade your Django version and start working with the newer version.

500 server error

"GET / HTTP/1.1" 500 145

"GET / HTTP/1.1" 500 257 "-" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"
"GET /favicon.ico HTTP/1.1" 500 257 "-" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"
"GET /favicon.ico HTTP/1.1" 500 257 "-" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"

Coming to the error, it so happens that when you use DEBUG=TRUE, you get no error. But when you set DEBUG=FALSE, you get the error.

Let’s do some primitive checks.

Primitive Checks :

• Is the error happening at all the urls routes (apps) of your site ?
• Is the admin url working ?
• Are all your Static files in place ?

Once you are done with the Primitive Checks, you can proceed ahead with the more specific checks.

Check 1:

Some static files might also cause this problem  when Debug was set to False.

The server might not be able to find some of the static files.

If the statics are not collected, in such cases also this error might occur.

• Verify your Static configs in Settings.py file and cross-check if their values are correct.
  • STATIC_URL = ‘/static/’
  • STATICFILES_DIRS =
  • STATIC_ROOT

• Check your Static File configs in Settings.py. Try using below. Sometimes whitenoise is not able to find some static imagesfiles and  throws ValueError. Try each of the below one by one and see if that solves the error. But use only one at a time for Setting.py.

STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.StaticFilesStorage'

STATICFILES_STORAGE = 'whitenoise.storage.CompressedStaticFilesStorage'

STATICFILES_STORAGE = django.contrib.staticfiles.storage.StaticFilesStorage

STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.ManifestStaticFilesStorage'

• Do a collectstatic when you launch the server.

python manage.py collectstatic

Check 2:

Have you used ALLOWED_HOSTS in Settings.py ?

ALLOWED_HOSTS is required in Production. This setting is MUST whenever you set DEBUG=False.

Because ALLOWED_HOSTS setting validates the request’s Host header and Safeguards against any kind of host-impacting attacks.

If you don’t use this , SuspiciousOperation is raised. That means when a user performs some operation, that is considered as suspicious from a security perspective e.g. tampering with a session cookie.

And if such a SuspiciousOperation exception reaches the WSGI handler level, then it is logged at the Error level.

Check 3:

Are you using the ADMINS in Settings.py ?

A list of all the people who get code error notifications.

Let’s see some interesting facts first.

First thing first, your Django app can actually send email to the users listed in the ADMINS setting whenever any  an internal server error occurs (for HTTP status code of 500 or greater). That way, the ADMINS gets description of the error, complete Python traceback, details about the HTTP request that caused the error, the details of exceptions raised in the request/response cycle etc.

It is advisable to set this up by –

• Specifying EMAIL_HOST , EMAIL_HOST_USER and EMAIL_HOST_PASSWORD, SERVER_EMAIL
• Put the email addresses of the addressees in the ADMINS setting.
• Refer Django settings documentation for complete list of email settings.
• By default, Django will send email from [email protected] – modify the SERVER_EMAIL setting, for setting a different user.

Example-

ADMINS = [(‘YOU’, ‘[email protected]’),]

Check 4:

You can use Sentry as a Add-on for some of the deployment e.g.

• Bitbucket Pipelines
• GitHub Actions
• Heroku
• Netlify
• Vercel

It might show more details about the error.

You can also add Sentry at the WSGI level. More details here – https://docs.sentry.io/platforms/python/guides/wsgi/

Check 5:

If you are using, compress for any of your code then you need to take care of the Django compress.

Add the below line to your Settings.py file

COMPRESS_ENABLED = os.environ.get('COMPRESS_ENABLED', False)

Check 6:

When you run the Django app in the Local server while using DEBUG=TRUE, check are there any Issue Reported – even though your Django app might be running fine.

Such kind of “Un-noticed error” have resulted in 500 server error in many cases.

So keep a close look at the Local server errors, if any.

You can try to run “python manage.py runserver” in the command line console with DEBUG=FALSE to check if you get the same error still.

Hope this helps to solve the error.

Other Interesting Reads –

• How to Send Large Messages in Kafka ?

• Fix Spark Error – “org.apache.spark.SparkException: Failed to get broadcast_0_piece0 of broadcast_0”

• How to Handle Bad or Corrupt records in Apache Spark ?

• How to use Broadcast Variable in Spark ?

• How to log an error in Python ?

• How to Code Custom Exception Handling in Python ?

• How to Handle Errors and Exceptions in Python ?

• How To Fix – “Ssl: Certificate_Verify_Failed” Error in Python ?

• How to Send Large Messages in Kafka ?

• Fix Spark Error – “org.apache.spark.SparkException: Failed to get broadcast_0_piece0 of broadcast_0”

• How to Handle Bad or Corrupt records in Apache Spark ?

• How to use Broadcast Variable in Spark ?

• Best Practices for Dependency Problem in Spark

• Sample Code – Spark Structured Streaming vs Spark Streaming

• Sample Code for PySpark Cassandra Application

• How to Enable UTF-8 in Python ?

• How to log an error in Python ?

• Sample Python Code To Read & Write Various File Formats (JSON, XML, CSV, Text)

• How to Handle Errors and Exceptions in Python ?

• How to Handle Bad or Corrupt records in Apache Spark ?

• How To Fix – Partitions Being Revoked and Reassigned issue in Kafka ?

• What Are The Most Important Metrics to Monitor in Kafka ?

• How To Connect Local Python to Kafka on AWS EC2 ?

• How to Send Large Messages in Kafka ?

• Fix Spark Error – “org.apache.spark.SparkException: Failed to get broadcast_0_piece0 of broadcast_0”

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Яm pretty new in Django and I пытаюсь собрать данные с помощью Ajax.
Кроме того, я хотел бы добавить, что яm trying to make and edit quiz app from tutorial(so I делаю это по учебнику, а не с нуля.

После нажатия на кнопку я получил ошибку

console.log('hello world quiz')
const url = window.location.href
console.log(url)

$.ajax({
    type: 'GET',
    url: `${url}data`,
    success:function(response){
        console.log(response)
    },
    error: function(error){
    console.log(error)
    }
})

Я вижу, что путь неправильный, он должен быть: http://127.0.0.1:8000/1/, not http://127.0.0.1:8000/1/data. Но изменение от:

url: `${url}data`,

to:

url: `${url}`,

не собирает информацию о количестве массивов и т.д.

У меня также есть ошибка из терминала:

Traceback (последний последний вызов): Файл
«/home/ad/Documents/myvenv/lib/python3.8/site-packages/django/core/handlers/exception.py»,
строка 34, в inner
response = get_response(request) Файл «/home/ad/Documents/myvenv/lib/python3.8/site-packages/django/core/handlers/base.py»,
строка 115, в _get_response
response = self.process_exception_by_middleware(e, request) Файл «/home/ad/Documents/myvenv/lib/python3.8/site-packages/django/core/handlers/base.py»,
строка 113, в _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs) File «/home/ad/Documents/test01/src/quizes/views.py», line 20, in
quiz_data_view
для q в quiz.get_questions(): File «/home/ad/Documents/test01/src/quizes/models.py», line 22, in
get_questions
return self.question_set.all[:self.number_of_questions] TypeError: ‘method’ object is not subscriptable

.

Но я понятия не имею, что можно изменить в quizes/models.py:

from typing import Text
from django.shortcuts import render
from .models import Quiz
from django.views.generic import ListView
from django.http import JsonResponse
# Create your views here.

class QuizListView(ListView):
    model = Quiz 
    template_name = 'quizes/main.html'

def quiz_view(request, pk):
    quiz = Quiz.objects.get(pk=pk)
    return render(request, 'quizes/quiz.html', {'obj': quiz})
    

def quiz_data_view(request, pk):
    quiz = Quiz.objects.get(pk=pk)
    questions = []
    for q in quiz.get_questions():
        answers = []
        for a in q.get_answers():
            answers.append(a.text)
        questions.append({str(q): answers})
    return JsonResponse({
        'data': questions,
        'time': quiz.time,
    })

или quizes/views.py:

from typing import Text
from django.shortcuts import render
from .models import Quiz
from django.views.generic import ListView
from django.http import JsonResponse
# Create your views here.

class QuizListView(ListView):
    model = Quiz 
    template_name = 'quizes/main.html'

def quiz_view(request, pk):
    quiz = Quiz.objects.get(pk=pk)
    return render(request, 'quizes/quiz.html', {'obj': quiz})
    

def quiz_data_view(request, pk):
    quiz = Quiz.objects.get(pk=pk)
    questions = []
    for q in quiz.get_questions():
        answers = []
        for a in q.get_answers():
            answers.append(a.text)
        questions.append({str(q): answers})
    return JsonResponse({
        'data': questions,
        'time': quiz.time,
    })

Можете ли вы помочь мне с некоторыми идеями?

def get_questions(self):
        return self.question_set.all[:self.number_of_questions]

def get_questions(self):
        return self.question_set.all()[:self.number_of_questions]

Вернуться на верх

У меня есть эти фрагменты кода, и я занимаюсь этим часами, но я не могу понять, что не так.

Я продолжаю получать ответ сервера 500, и он даже не запускал отладку в определении представления, когда я запускал ajax.

Я действительно в растерянности, любая помощь была бы фантастической!

    $('.cheque_info_edit_button').live('click', function(){

var new_cheque = {
    // cheque number is taken from the cell, not input box for this one.
    cheque_no: $(this).closest('td').closest('tr').find('.inv_prof_cheque_no').text(),
    their_bank: $(this).closest('td').closest('tr').find('.new_their_bank_input_ajax').val(),
    our_bank: $(this).closest('td').closest('tr').find('.new_our_bank_input_ajax').val(),
    cash_in_date: $(this).closest('td').closest('tr').find('.new_cash_in_date_input_ajax').val(),
    cheque_amount: $(this).closest('td').closest('tr').find('.new_cheque_amount_input_ajax').val(),
    info_type: 'edit'
   };

    var cheque_json = JSON.stringify(new_cheque);
    $.ajax({
       type: 'POST',
       url: '/best_choose/invoice/profile/inv_add_or_edit_cheque/',
       data: cheque_json,
       success: function(){
       // do stuff
}

ОБНОВЛЕНИЕ: я не думаю, что синтаксически что-то не так с моим представлением, поэтому я взял его и добавил трассировку, что-то не так с токеном csrf? Все мои другие функции ajax работают

Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/best_choose/invoice/profile/inv_add_or_edit_cheque/

Django Version: 1.3
Python Version: 2.7.2
Installed Applications:
['django.contrib.auth',
'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'SY_SYSTEM.sy_system',
 'django.contrib.humanize']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.middleware.csrf.CsrfResponseMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


 Traceback:
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  178.                 response = middleware_method(request, response)
 File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/middleware/csrf.py" in process_response
  287.             response.content, n = _POST_FORM_RE.subn(add_csrf_field, response.content)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/django/http/__init__.py" in _get_content
  596.         return smart_str(''.join(self._container), self._charset)

Exception Type: TypeError at /best_choose/invoice/profile/inv_add_or_edit_cheque/
Exception Value: sequence item 0: expected string, NoneType found

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