无法在 django 项目中创建过滤器

Question

我想在项目中添加过滤器，但这个错误出现在 CMD 中

AttributeError: module 'rest_framework.filters' has no attribute 'DjangoFilterBackend'

项目名称 = 框架 ProjectApp 名称 = 框架

Views.py

from typing import Tuple
from django.shortcuts import render
from .serializer import TaskSerializers
from rest_framework import viewsets
from .models import Task
from rest_framework import filters
import django_filters

# Create your views here.
class myviewset(viewsets.ModelViewSet):
    queryset = Task.objects.all()
    serializer_class = TaskSerializers
    filter_backends =(filters.DjangoFilterBackend,filters.OrederingFilter)
    filter_fields=('completed',)
    ordering = ('-date_created')

已安装的应用：

INSTALLED_APPS = [
    'framework',
    'rest_framework',
    'django_filters',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

Answer 1

DjangoFilterBackend 类确实不是源自rest_framework.filters，而是源自django_filters.rest_framework 模块，因此您应该将其导入为：

from typing import Tuple
from django.shortcuts import render
from .serializer import TaskSerializers
from rest_framework import viewsets
from .models import Task
#     ↓ load from the django_filters module
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework import filters
import django_filters

# Create your views here.
class myviewset(viewsets.ModelViewSet):
    queryset = Task.objects.all()
    serializer_class = TaskSerializers
    filter_backends =(DjangoFilterBackend, filters.OrderingFilter)
    filter_fields=('completed',)
    ordering = ('-date_created',)

为了使用它，您首先需要在虚拟环境中安装django-filter 包：

pip install <b>django-filter</b>

并将其添加到INSTALLED_APPS:

# settings.py

INSTALLED_APPS = [
    # …,
    'django_filters',
    # …
]