了AttributeError的試圖獲得價值領域的串行

Question

當試圖在串行AthleteSerializer得到一個值場 first_name時，我得到了以下錯誤

了AttributeError的。序列化程序字段 可能命名錯誤，並且不匹配實例上的任何屬性或鍵。原始異常文本是：'QuerySet'對象 沒有屬性'first_name'。

爲什麼我得到一個錯誤？

這是我的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) 

這是我serializers.py

from rest_framework import serializers 
from .models import Athlete 

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

這是我的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

試試這個：

serializer = AthleteSerializer(all_athletes, many=True)