Python django rest框架：为什么我的API为我的枚举返回键而不是值？

我在我的第一个API开发中遇到了麻烦。我希望有人能告诉我我做错了什么

这是我的型号。py：

from django.db import models

# Create your models here.

COUNTRY_LIST = [('PL', 'Poland'), ('DK', 'Denmark'), ('FI', 'Finland')]


class Trip(models.Model):

    startDate = models.DateField()
    endDate = models.DateField()
    country = models.ChoiceField(choices=COUNTRY_LIST, max_length=2)

from rest_framework import serializers
from trips.models import Trip, COUNTRY_LIST, CLIENTS_LIST, TRANSPORTS_LIST, STATUS_LIST

# Trip Serializer


class TripSerializer(serializers.ModelSerializer):
    class Meta:
        model = Trip
        fields = '__all__'

from rest_framework.exceptions import ValidationError
from rest_framework.generics import ListAPIView, CreateAPIView, RetrieveUpdateDestroyAPIView
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework.filters import SearchFilter
from trips.serializers import TripSerializer
from trips.models import Trip
import re

class TripList(ListAPIView):
    queryset = Trip.objects.all()
    serializer_class = TripSerializer
    filter_backends = (DjangoFilterBackend, SearchFilter)
    filter_fields = ('id', 'tripStatus', 'employeeId')
    search_fields = ('place', 'remarks')

from django.conf import settings
from django.conf.urls.static import static
from django.contrib import admin
from django.urls import path, include

import trips.views
import trips.api_views

urlpatterns = [
    path('trip', trips.api_views.TripList.as_view()),

这是我的序列化程序。py：

from django.db import models

# Create your models here.

COUNTRY_LIST = [('PL', 'Poland'), ('DK', 'Denmark'), ('FI', 'Finland')]


class Trip(models.Model):

    startDate = models.DateField()
    endDate = models.DateField()
    country = models.ChoiceField(choices=COUNTRY_LIST, max_length=2)

from rest_framework import serializers
from trips.models import Trip, COUNTRY_LIST, CLIENTS_LIST, TRANSPORTS_LIST, STATUS_LIST

# Trip Serializer


class TripSerializer(serializers.ModelSerializer):
    class Meta:
        model = Trip
        fields = '__all__'

from rest_framework.exceptions import ValidationError
from rest_framework.generics import ListAPIView, CreateAPIView, RetrieveUpdateDestroyAPIView
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework.filters import SearchFilter
from trips.serializers import TripSerializer
from trips.models import Trip
import re

class TripList(ListAPIView):
    queryset = Trip.objects.all()
    serializer_class = TripSerializer
    filter_backends = (DjangoFilterBackend, SearchFilter)
    filter_fields = ('id', 'tripStatus', 'employeeId')
    search_fields = ('place', 'remarks')

from django.conf import settings
from django.conf.urls.static import static
from django.contrib import admin
from django.urls import path, include

import trips.views
import trips.api_views

urlpatterns = [
    path('trip', trips.api_views.TripList.as_view()),

这是我的api_视图。py：

from django.db import models

# Create your models here.

COUNTRY_LIST = [('PL', 'Poland'), ('DK', 'Denmark'), ('FI', 'Finland')]


class Trip(models.Model):

    startDate = models.DateField()
    endDate = models.DateField()
    country = models.ChoiceField(choices=COUNTRY_LIST, max_length=2)

from rest_framework import serializers
from trips.models import Trip, COUNTRY_LIST, CLIENTS_LIST, TRANSPORTS_LIST, STATUS_LIST

# Trip Serializer


class TripSerializer(serializers.ModelSerializer):
    class Meta:
        model = Trip
        fields = '__all__'

from rest_framework.exceptions import ValidationError
from rest_framework.generics import ListAPIView, CreateAPIView, RetrieveUpdateDestroyAPIView
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework.filters import SearchFilter
from trips.serializers import TripSerializer
from trips.models import Trip
import re

class TripList(ListAPIView):
    queryset = Trip.objects.all()
    serializer_class = TripSerializer
    filter_backends = (DjangoFilterBackend, SearchFilter)
    filter_fields = ('id', 'tripStatus', 'employeeId')
    search_fields = ('place', 'remarks')

from django.conf import settings
from django.conf.urls.static import static
from django.contrib import admin
from django.urls import path, include

import trips.views
import trips.api_views

urlpatterns = [
    path('trip', trips.api_views.TripList.as_view()),

这是我的URL.py：

from django.db import models

# Create your models here.

COUNTRY_LIST = [('PL', 'Poland'), ('DK', 'Denmark'), ('FI', 'Finland')]


class Trip(models.Model):

    startDate = models.DateField()
    endDate = models.DateField()
    country = models.ChoiceField(choices=COUNTRY_LIST, max_length=2)

from rest_framework import serializers
from trips.models import Trip, COUNTRY_LIST, CLIENTS_LIST, TRANSPORTS_LIST, STATUS_LIST

# Trip Serializer


class TripSerializer(serializers.ModelSerializer):
    class Meta:
        model = Trip
        fields = '__all__'

from rest_framework.exceptions import ValidationError
from rest_framework.generics import ListAPIView, CreateAPIView, RetrieveUpdateDestroyAPIView
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework.filters import SearchFilter
from trips.serializers import TripSerializer
from trips.models import Trip
import re

class TripList(ListAPIView):
    queryset = Trip.objects.all()
    serializer_class = TripSerializer
    filter_backends = (DjangoFilterBackend, SearchFilter)
    filter_fields = ('id', 'tripStatus', 'employeeId')
    search_fields = ('place', 'remarks')

from django.conf import settings
from django.conf.urls.static import static
from django.contrib import admin
from django.urls import path, include

import trips.views
import trips.api_views

urlpatterns = [
    path('trip', trips.api_views.TripList.as_view()),

发行说明： 当前，我的API以数据响应设计，其中返回枚举的键，如下所示：

{
    "id": 6,
    "startDate": "2019-11-04",
    "endDate": "2019-11-05",
    "country": "PL"
},

我想我需要在serializers.py中实现一些更改，使其响应如下：

{
    "id": 6,
    "startDate": "2019-11-04",
    "endDate": "2019-11-05",
    "country": "Poland"
},

有人能给我一些建议吗？提前感谢。

因为，您可以指定

源=…

参数，并指定它应该使用该值的显示：

class TripSerializer(serializers.ModelSerializer):
    country = serializers.CharField(source='get_country_display')

    class Meta:
        model = Trip
        fields = '__all__'

类TripSerializer（serializers.ModelSerializer）：
country=serializers.CharField（source='get\u country\u display'）
类元：
模型=行程
字段='\uuuu all\uuuu'

---

因此，在这里，我们不使用

country

值本身，而是使用

get\u country\u display

从API读取数据时，它通常非常有效。但现在我的帖子（旅行创建）似乎停止了工作。当我发送帖子时，我的API中出现了以下错误。调用

trip.objects.create（）

时，/trip/new处的TypeError得到了一个

TypeError

。这可能是因为序列化程序类上有一个可写字段，该字段不是Trip.objects.create（）的有效参数。您可能需要将字段设置为只读，或重写TripSerializer.create（）方法以正确处理此问题。