Typ Objekt 'UploadSerializers' hat kein Attribut 'HyperlinkedModelSerializer'

Question

versucht, die Django Erholung Rahmenfremdschlüssel Serialisierung zu tun ,, jedoch habe ich diesen Fehler,

models.py

class ProductsTbl(models.Model): 
    model_number = models.CharField(
     max_length=255, 
     blank=True, 
     unique=True, 
     error_messages={ 
      'unique': "這 model number 已經被註冊了 ." 
     } 
    ) 
    name = models.CharField(max_length=255, blank=True, null=True) 
    material = models.CharField(max_length=255, blank=True, null=True) 
    color = models.CharField(max_length=255, blank=True, null=True) 
    feature = models.TextField(blank=True, null=True) 
    created = models.DateTimeField(editable=False) 
    modified = models.DateTimeField(auto_now=True) 
    release = models.DateTimeField(blank=True, null=True) 
    twtime = models.DateTimeField(blank=True, null=True) 
    hktime = models.DateTimeField(blank=True, null=True) 
    shtime = models.DateTimeField(blank=True, null=True) 
    jptime = models.DateTimeField(blank=True, null=True) 
    suggest = models.TextField(blank=True, null=True) 
    description = models.TextField(blank=True, null=True) 
    user = models.ForeignKey(User, blank=True, null=True) 
    useredit = models.CharField(max_length=32, blank=True, null=True) 

    def __unicode__(self): 
     return self.name 

    def save(self, *args, **kwargs): 
     ''' On save, update timestamps ''' 

     if not self.id: 
      self.created = timezone.now() 

     return super(ProductsTbl, self).save(*args, **kwargs) 


def get_image_path(instance, filename): 
    return '/'.join(['thing_images', instance.thing.slug, filename]) 


class Upload(models.Model): 
    thing = models.ForeignKey(ProductsTbl, related_name="uploads") 
    image = models.ImageField(upload_to=get_image_path, verbose_name='Image') 

    def save(self, *args, **kwargs): 
     super(Upload, self).save(*args, **kwargs) 
     if self.image: 
      image = Image.open(self.image) 
      i_width, i_height = image.size 
      max_size = (640, 480) 

      if i_width > 1000: 
       image.thumbnail(max_size, Image.ANTIALIAS) 
       image.save(self.image.path) 

api/serializers.py

from rest_framework import serializers 
from ..models import * 
from django.contrib.auth.models import User 
from django.contrib.auth import get_user_model 


UserModel = get_user_model() 

class UploadSerializers(serializers.ModelSerializer): 
    class Meta: 
     model = Upload 
     fields = ('image',) 



class ProductsTblSerializer(serializers.HyperlinkedModelSerializer): 
    uploads = UploadSerializers.HyperlinkedModelSerializer(many=True,read_only=True) 
    class Meta: 
     model = ProductsTbl 
     fields = ('model_number', 
     'created', 
     'name', 
     'release', 
     'twtime', 
     'hktime', 
     'shtime', 
     'jptime', 
     'feature', 
     'material', 
     'suggest', 
     'description', 
     'cataloggroup', 
     'place', 
     'scale', 
     'slug', 
     'user', 
     'uploads') 

api/urls.py

from django.conf.urls import url, include 
from . import views 


urlpatterns = [ 
    url(r'^productsTbls/$', views.ProductsTblListView.as_view(), name='productsTbls_list'), 
    url(r'^productsTbls/(?P<pk>\d+)/$', views.ProductsTblDetailView.as_view(), name='productsTbls_detail'), 
    url(r'^productsTbls/pdelete/(?P<id>[-\w]+)/$',views.api_delete_product,name='api_delete_p'), 
    url(r'^productsTbls/register/$', views.CreateUserView.as_view(), name='productsTbls_register'), 
] 

api/views.py

from rest_framework.parsers import JSONParser 
from django.views.decorators.csrf import csrf_exempt 
from django.forms import modelformset_factory 
from django.template.defaultfilters import slugify 
from rest_framework import permissions 
from rest_framework.generics import CreateAPIView 
from django.contrib.auth import get_user_model 
from rest_framework.permissions import AllowAny 




class ProductsTblListView(generics.ListCreateAPIView): 
    queryset = ProductsTbl.objects.order_by('-created') 
    serializer_class = ProductsTblSerializer 



class ProductsTblDetailView(generics.RetrieveUpdateDestroyAPIView): 
    queryset = ProductsTbl.objects.all() 
    serializer_class = ProductsTblSerializer 

jedoch ,, wenn ich änderte die api/serializers.py wie unten

...... 
class ProductsTblSerializer(serializers.ModelSerializer): 
    uploads = UploadSerializers(many=True,read_only=True) 
...... 

Ich kann sehen http://127.0.0.1:8000/api/productsTbls/ meine Seite kommen, aber ohne den Bildlink, wie kann ich den Bildlink in "uploads":[] zeigen? Thank you so

Answer 1

Sie haben geerbt Ihre UploadSerializer Klasse von serializers.ModelSerializer, nicht von serializers.HyperLinkedModelSerializer

class UploadSerializers(serializers.ModelSerializer): 
    class Meta: 
     model = Upload 
     fields = ('image',) 

(Rest Rahmen 3.4 django), wenn Sie es als

zu verwenden versuchen,

uploads = UploadSerializers.HyperlinkedModelSerializer(many=True,read_only=True)

es hat dieses Attribut nicht.

Wenn Sie Ihre ursprüngliche Deklaration von UploadSerializers von der Hyperlink-Klasse übernehmen, sollte es funktionieren.

class UploadSerializers(serializers.HyperlinkedModelSerializer): 
    class Meta: 
     model = Upload 
     fields = ('image',) 

Dann sollten Sie in der Lage sein zu verwenden:

uploads = UploadSerializers(many=True,read_only=True)