北京网站建设公司联系方式,一个网站开发流程,站长工具高清,wordpress手机博客动态修改字段可以使Django rest框架API像graphQL端点一样#xff0c;只从模型中检索所需的字段。
一旦序列化器被初始化#xff0c;就可以使用.fields属性访问序列化器上设置的字段字典。访问和修改此属性允许您动态修改序列化器。
显式地修改fields参数可以帮助您做一些奇…动态修改字段可以使Django rest框架API像graphQL端点一样只从模型中检索所需的字段。
一旦序列化器被初始化就可以使用.fields属性访问序列化器上设置的字段字典。访问和修改此属性允许您动态修改序列化器。
显式地修改fields参数可以帮助您做一些奇怪的事情例如在运行时修改序列化器字段参数而不是预定义它。 创建项目
djang-admin startproject ellistest创建app
cd ellistest
python manage.py startapp testserializer注册app
INSTALLED_APPS [django.contrib.admin,django.contrib.auth,django.contrib.contenttypes,django.contrib.sessions,django.contrib.messages,django.contrib.staticfiles,rest_framework,testserializer.apps.TestserializerConfig,
]
创建model以及序列化器 models.py
from django.db import models# Create your models here.
class TestModel(models.Model):id models.BigAutoField(primary_keyTrue)name models.CharField(max_length255)age models.IntegerField()def generateTwoValue(self):return self.name11,str(self.age)1from rest_framework import serializers
class TestModelSerializer(serializers.ModelSerializer):name_col serializers.SerializerMethodField()age_col serializers.SerializerMethodField()def __init__(self, *args, **kwargs):# Dont pass the fields arg up to the superclassrequest kwargs.get(context, {}).get(request)str_fields request.GET.get(fields, ) if request else Nonefields str_fields.split(,) if str_fields else None# Instantiate the superclass normallysuper(TestModelSerializer, self).__init__(*args, **kwargs)if fields is not None:# Drop any fields that are not specified in the fields# argument.allowed set(fields)existing set(self.fields)for field_name in existing - allowed:self.fields.pop(field_name)class Meta:model TestModelfields __all__def _get_two_values(self, obj):if not hasattr(self, _two_values):self._two_values obj.generateTwoValue()return self._two_valuesdef get_name_col(self,obj):name_col, _ self._get_two_values(obj)return name_coldef get_age_col(self,obj):_, age_col self._get_two_values(obj)return age_col
数据库迁移
python manage.py makemigrations
python manage.py migrate创建view views.py
from rest_framework.viewsets import GenericViewSet
from rest_framework.response import Response
from rest_framework import status
from testserializer.models import TestModel,TestModelSerializer
# Create your views here.
class TestView(GenericViewSet):queryset TestModel.objects.all()serializer_class TestModelSerializerdef list(self, request, *args, **kwargs):queryset self.filter_queryset(self.get_queryset())page self.paginate_queryset(queryset)if page is not None:serializer self.get_serializer(page, manyTrue)return self.get_paginated_response(serializer.data)serializer self.get_serializer(queryset, manyTrue)return Response(serializer.data)def create(self, request, *args, **kwargs):serializer self.get_serializer(datarequest.data)serializer.is_valid(raise_exceptionTrue)serializer.save()return Response(serializer.data, statusstatus.HTTP_201_CREATED)创建路由 urls.py from django.conf.urls import url, include
from rest_framework import routers
from testserializer.views import TestViewroute routers.DefaultRouter(trailing_slashFalse)
route.register(rtest,TestView,test)urlpatterns [url(r^,include(route.urls)),
]
访问 http://127.0.0.1:9999/api/v1/test?fieldsname,age
https://stackoverflow.com/questions/40663579/call-method-once-to-set-multiple-fields-in-django-rest-framework-serializer
https://joel-hanson.medium.com/advanced-serializer-usage-dynamically-modifying-fields-e7c3bc28efa6
