了AttributeError的试图获得价值领域的串行

Question

当试图在串行AthleteSerializer得到一个值场 first_name时，我得到了以下错误

了AttributeError的。序列化程序字段 可能命名错误，并且不匹配实例上的任何属性或键。原始异常文本是：'QuerySet'对象 没有属性'first_name'。

为什么我得到一个错误？

这是我的views.py：

from rest_framework.response import Response 
from rest_framework.views import APIView 
from .models import Athlete 

from athletics.serializers import AthleteSerializer 

class ListAthletes(APIView): 
    def get(self, request, format=None): 
     all_athletes = Athlete.objects.all() 
     import pdb; pdb.set_trace() 
     serializer = AthleteSerializer(all_athletes) 
     return Response(serializer.data) 

这是我serializers.py

from rest_framework import serializers 
from .models import Athlete 

class AthleteSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = Athlete 
     fields = (
      'first_name', 
      'last_name' 
     ) 

这是我的models.py：

from django.db import models 

class Athlete(models.Model): 
    first_name = models.CharField(max_length=30) 
    last_name = models.CharField(max_length=30) 

Answer 1

试试这个：

serializer = AthleteSerializer(all_athletes, many=True)