[英]Django Rest Serializer returns empty
我正在關注本教程( Django Rest Framework ),並且在嘗試使用序列化程序時遇到問題。 它返回一個空結果,而不是49086記錄它應返回。 我的查詢沒問題,因為當我嘗試不使用序列化程序顯示數據時,就會顯示這些數據。 拜托,我做錯了什么?
models.py
# coding=utf-8
from __future__ import unicode_literals
from django.db import models
class Workers(models.Model):
chapa = models.IntegerField(primary_key=True)
emp_cod = models.IntegerField(primary_key=False)
class Meta:
managed = False
db_table = 'WORKERS'
serializers.py
from rest_framework import serializers
from .models import Workers
class WorkersSerializer(serializers.ModelSerializer):
class Meta:
model = Workers
fields = '__all__'
views.py
...
@api_view(['GET'])
@permission_classes((permissions.AllowAny,))
def get_all_workers(request):
data = Workers.objects.using('rh').all().order_by('emp_cod')
print(data.count()) # Returns 49086
serializer = WorkersSerializer(data)
print(serializer.data) # Returns {}
json = JSONRenderer().render(serializer.data)
return Response(json) # Returns Django Rest standard page with "{}" data
您應該使用many=True
序列化器的參數來序列化多個對象。 您也可以直接將serializer.data
作為Response
參數傳遞:
@api_view(['GET'])
@permission_classes((permissions.AllowAny,))
def get_all_workers(request):
data = Workers.objects.using('rh').all().order_by('emp_cod')
serializer = WorkersSerializer(data, many=True)
return Response(serializer.data)
由於您的視圖一次返回了很多對象,因此建議您添加分頁 :
from rest_framework.pagination import PageNumberPagination
@api_view(['GET'])
@permission_classes((permissions.AllowAny,))
def get_all_workers(request):
data = Workers.objects.using('rh').all().order_by('emp_cod')
paginator = PageNumberPagination()
paginator.page_size = 10
result_page = paginator.paginate_queryset(data, request)
serializer = WorkersSerializer(result_page, many=True)
return Response(serializer.data)
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