Django-filter 使用记录

Django-filter 使用记录

配合DRF食用更佳

安装及注册

pip install django-filter

INSTALLED_APPS = [
    ...
    'django_filters',
    ...
  
]

示例model

class User(models.Model):
    # 模型字段
    name = models.CharField(max_length=10, verbose_name="姓名")
    sex = models.BooleanField(default=1, verbose_name="性别")
    age = models.IntegerField(verbose_name="年龄")
    phone = models.CharField(max_length=20, null=True, verbose_name="电话")
    addr = models.CharField(max_length=100,null=True,verbose_name="地址")

    class Meta:
        db_table = "tb_user"
        verbose_name = "用户"
        verbose_name_plural = verbose_name

过滤

方式一

• 视图层直接设置过滤字段

示例：

# 以name和age过滤
class UserViewSet(ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserModelSerializer
    filter_backends = (DjangoFilterBackend,)
    filter_fields = ('name', 'age')

• filter_backends 配置过滤器，也可以在setting.py文件全局配置

# 这样
REST_FRAMEWORK = {
    'DEFAULT_FILTER_BACKENDS': ('django_filters.rest_framework.DjangoFilterBackend',) #全局默认配置过滤
    }

• filter_fields

设置过滤字段，这里设置了name和age

运行服务

df1.png

以name=niko过滤

df2.png

这里设置的是对字段的精确过滤

方式二

新建一个filter.py文件

import django_filters
from user.models import User

class UserFilter(django_filters.FilterSet):

    class Meta:
        model = User
        fields = ["name", "age"]
       

更改视图

class UserViewSet(ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserModelSerializer
    filter_backends = (DjangoFilterBackend,)
    # filter_fields = ('name', 'age')
    filter_class = UserFilter   # 指定过滤器类

效果和上面一样

more

模糊过滤

class UserFilter(django_filters.FilterSet):

    class Meta:
        model = User
        # fields = ["name", "age"]
        fields = {
            "name": ['exact','icontains'],
            "age": ['exact'],
        }

• exact：默认过滤方式，精确过滤
• icontains：模糊过滤

查找 name中有 n 的

df3.png

GET /user/users/?name=&name__icontains=n

df4.png

范围过滤

class UserFilter(django_filters.FilterSet):

    # name_mh = django_filters.CharFilter(field_name='name',lookup_expr='icontains')
    # age_gt = django_filters.NumberFilter(field_name='age', lookup_expr='gt')
    # age_lt = django_filters.NumberFilter(field_name='age', lookup_expr='lt')
    
    class Meta:
        model = User
        # fields = ["name", "age"]
        fields = {
            "name": ['exact','icontains'],
            "age": ['exact','gte','lte'],
        }

• 生成的过滤器
  • name 精确查找
  • name__icontains 模糊查找
  • age
  • age__gte 大于等于
  • age__lte 小于等于

列表里面就是lookup_expr的参数，上面的自定义字段过滤名称写法也可以的

gt    大于
gte  大于等于

lt     小于
lte  小于等于

对于日期
year__gt
month__gt
day__gt

图就不上了哈

排序

class UserFilter(django_filters.FilterSet):

    # name_mh = django_filters.CharFilter(field_name='name',lookup_expr='icontains')
    sort = django_filters.OrderingFilter(fields=('age',))
    # age_gt = django_filters.NumberFilter(field_name='age', lookup_expr='gt')
    # age_lt = django_filters.NumberFilter(field_name='age', lookup_expr='lt')
    class Meta:
        model = User
        # fields = ["name", "age"]
        fields = {
            "name": ['exact','icontains'],
            "age": ['exact','gte','lte'],
        }

GET /user/users/?sort=age:表示升序

GET /user/users/?sort=-age:表示降序