Hi.

In your view instead of using Response(serializer) you need to use
Response(serializer.data)

HTH.


ma 8. heinäk. 2019 klo 19.48 'Amitesh Sahay' via Django users <
django-users@googlegroups.com> kirjoitti:

> hello Members,
>
> I am working on some POC for django rest framework. Its very simple setup,
> nothing complicated. While I was doing my testing I am facing below error:
>
> ===================================
> TypeError at /api/status/
>
> Object of type 'ListSerializer' is not JSON serializable
>
> Request Method: GET
> Request URL: http://127.0.0.1:8000/api/status/
> Django Version: 1.11.8
> Exception Type: TypeError
> Exception Value:
>
> Object of type 'ListSerializer' is not JSON serializable
>
> Exception Location: /usr/lib/python3.6/json/encoder.py in default, line
> 180
> Python Executable: /root/PycharmProjects/vrest/bin/python
> Python Version: 3.6.5
> Python Path:
>
> ['/root/PycharmProjects/src',
>  '/usr/local/buildtools/current/sitecustomize',
>  '/usr/lib/python36.zip',
>  '/usr/lib/python3.6',
>  '/usr/lib/python3.6/lib-dynload',
>  '/root/PycharmProjects/vrest/lib/python3.6/site-packages']
>
> Server time: Mon, 8 Jul 2019 16:03:26 +0000
> ===================================
> Below are the details :
> -----------------------------
> serializers.py
>
> from rest_framework import serializers
> from STATUS.models import Status
>
>
> class StatusSerializer(serializers.ModelSerializer):
>     class Meta:
>         model = Status
>         fields = [
>             'user',
>             'content',
>             'image'
>         ]
>
>     def validate_content(self, value):
>         if len(value) > 500:
>             raise serializers.ValidationError("way too long string")
>
>     def validate(self, data):
>         content = data.get('content', None)
>         if content =='':
>             content = None
>         image = data.get('image', None)
>         if content is None and image is None:
>             raise serializers.ValidationError('Required fields')
>         return data
>
>
> models.py
> -------------
>
> from django.db import models
> from django.conf import settings
>
>
> def upload_status_image(instance, filename):
>     return "updates/{user}/{filename}" .format(user=instance.user, 
> filename=filename)
>
>
> class StatusQuerySet(models.QuerySet):
>     pass
>
>
> class StatusManager(models.Manager):
>     def get_queryset(self):
>         return StatusQuerySet(self.model, using=self._db)
>
>
> class Status(models.Model):
>     user = models.ForeignKey(settings.AUTH_USER_MODEL)
>     content = models.TextField(null=True, blank=True)
>     image = models.ImageField(upload_to=upload_status_image)
>     updated = models.DateTimeField
>     timestamp = models.DateTimeField(auto_now_add=True)
>
>     objects = StatusManager()
>
>     def __str__(self):
>         return str(self.content)[:50]
>
>     class Meta:
>         verbose_name = 'status post'
>         verbose_name_plural = 'status posts'
>
> views.py
>
> from django.views.generic import View
> from rest_framework.views import APIView
> from rest_framework.response import Response
> from .serializers import StatusSerializer
> from STATUS.models import Status
>
>
> class StatusListSearchAPIView(APIView):
>     permission_classes = []
>     authentication_classes = []
>
>     def get(self, request, format=None):
>         qs = Status.objects.all()
>         serializer = StatusSerializer(qs, many=True)
>         return Response(serializer)
>
> forms.py
>
> from django import forms
> from .models import Status
>
> class StatusForm(forms.ModelForm):
>     class Meta:
>         model = Status
>         fields = [
>             'user',
>             'content',
>             'image'
>         ]
>
>     def clean_content(self, *args, **kwargs):
>         content = self.cleaned_data.get('content')
>         if len(content) > 240:
>             raise forms.ValidationError('Content is too long')
>         return content
>
>     def clean(self, *args, **kwargs):
>             data = self.cleaned_data
>             content = data.get('content', None)
>             if content == '':
>                 content = None
>
>             image = data.get('image', None)
>             if content is None and image is None:
>                 raise forms.ValidationError('Content or image is required..')
>             return super().clean(*args, **kwargs)
>
> app.urls.py
>
> from django.conf.urls import url, include
> from django.contrib import admin
> from .views import StatusListSearchAPIView
>
> urlpatterns = [
>     url(r'^$', StatusListSearchAPIView.as_view()),
>     #url(r'^create/$', StatusCreateAPIView.as_view()),
>     #url(r'^(?P<id>.*)/$', StatusDetailAPIiew.as_view()),
>     #url(r'^(?P<id>.*)/update/$', StatusUpdateAPIView.as_view()),
>     #url(r'^(?P<id>.*)/update/$', StatusDeleteAPIView.as_view()),
>
> ]
>
> project.urls.py
>
> from django.conf.urls import url, include
> from django.contrib import admin
>
> urlpatterns = [
>     url(r'^admin/', admin.site.urls),
>     url(r'api/status/', include('STATUS.API.urls')),
> ]
>
> Project Structure : attached with the email, if not found do let me know I
> will re-attach
>
>
>
> *Project name:      google*
> *APP name:           STATUS*
> *django version :  1.11*
> *python version :  3.6*
> *djangorestframework : 3.9.4*
>
>
> Regards,
> Amitesh Sahay
>
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