Form.errors не возвращает плохой запрос

После отправки формы, желаемый результат - отображение сообщений об ошибках валидации в шаблоне, если форма не валидна. Когда дело доходит до того, что я фактически получаю и форма не отлавливает ошибки (у меня Max_length = 240... не отлавливает ошибку, когда текст > 240).

forms.py:

from django import forms

from .models import Postit

MAX_POST_LENGTH = 240


class PostForm(forms.ModelForm):
    class Meta:
        model = Postit
        fields = ['content']

    def valid_content(self):
        content = self.validated_data.get("content")
        if len(content) > MAX_POST_LENGTH:
            raise forms.ValidationError("This message is too long")
        return content

views.py:

from django.http import HttpResponse, Http404, JsonResponse
from django.shortcuts import render, redirect
import random
from django.utils.http import url_has_allowed_host_and_scheme

from .forms import PostForm
from .models import Postit

# Create your views here.


def homepage_view(request, *args, **kwargs):
    return render(request, 'pages/home.html', context={}, status=200)

# create a new post and add to database


def post_create_view(request, *args, **kwargs):
    form = PostForm(request.POST or None)
    next_url = request.POST.get('next') or None  # pass next_url to respones
    if form.is_valid():
        obj = form.save(commit=False)
        obj.save()
        if request.headers.get('X-Requested-With' or
                               "HTTP_X_REQUESTED_WITH") == 'XMLHttpRequest':
            return JsonResponse(obj.serialize(),
                                status=201)  # testing if ajax is true
        if next_url is not None and url_has_allowed_host_and_scheme(next_url, 'localhost'):
            # if next_url invalid, no redirect - and check if safe
            return redirect(next_url)
        form = PostForm()
    if form.errors:
        if request.headers.get('X-Requested-With' or
                               "HTTP_X_REQUESTED_WITH") == 'XMLHttpRequest':
            return JsonResponse(form.errors, status=400)
    return render(request, 'comp/form.html', context={"form": form})


def postit_list_view(request, *args, **kwargs):
    """
    REST API VIEW
    return json data
    """
    query_set = Postit.objects.all()
    post_list = [x.serialize() for x in query_set]
    data = {
        "isUser": False,
        "response": post_list
    }
    return JsonResponse(data)


def postit_detail_view(request, postit_id, *args, **kwargs):
    """
    REST API VIEW
    return json data
    """
    data = {
        "id": postit_id,
    }
    status = 200
    try:
        obj = Postit.objects.get(id=postit_id)
        data['content'] = obj.content
    except:
        data['message'] = "Not found"
        status = 404
    return JsonResponse(data, status=status)
    # json.dumps content_type='application/json'

шаблонный вид:

Вернуться на верх