django filters实现数据过滤的示例代码

 {#格式   值｜函数#} {#    如果没有值，那么使用默认值#} <p>{{ bucunzai|default:'空的哦' }}</p> {#    取出变量长度#} <q>{{ name }}--{{ name|length }}</q> {#      文件大小转换成可读型  kb 自动转成bm、g、tb#} <p>文件大小{{ file_size|filesizeformat }}</p> {#    切片 从指定位置到指定位 ，例：第3位到-2位#} <p>切片:{{ slice_str|slice:'3:-2' }}</p> {#    把datetime取到的时间，转成指定格式#} <p>格式化：{{ now|date:'Y-m-d H:i:s' }}</p> {#    如果后端内容包含标签，那么加上safe 才能转义（防止用户直接加script标签作弊）防XSS攻击#} <p>{{ h_html|safe }}</p> {#    取摘要只显示一段，指定取长度后面...例：120个字符 #} <p>长文本：{{ p_str|truncatechars:12 }}</p>

 class UserView(ListAPIView): """用户列表""" queryset = User.objects.all() serializer_class = UserSerializer filter_backends = (DjangoFilterBackend,) filter_class = UserMonthFilter  # 指定过滤类 

 class RobotFilter(django_filters.FilterSet): # 使用过滤：URL?created_start_time=2020_01-20&created_end_time=2020_01-21 robot_id = django_filters.CharFilter(field_name='id') machine_id = django_filters.CharFilter(field_name='machine_id') city = django_filters.CharFilter(field_name='city') # lookup_expr（可选）为判断条件，field_name（必选）为模型类属性，created_time查询字符串 created_time= django_filters.CharFilter(field_name='created_at', lookup_expr='startswith') created_start_time = django_filters.DateTimeFilter(field_name='created_at', lookup_expr='gt') created_end_time = django_filters.DateTimeFilter(field_name='created_at', lookup_expr='lt') problem_isnull = django_filters.BooleanFilter(field_name='problem', lookup_expr='isnull') name = django_filters.CharFilter(lookup_expr='iexact')  # iexact表示精确匹配, 并且忽略大小写 author = django_filters.CharFilter(lookup_expr='icontains') #icontains表示模糊查询（包含），并且忽略大小写 price = django_filters.NumberFilter(look_expr='exact')  #exact表示精确匹配 task_res_state = django_filters.CharFilter(method="get_task_res_state") def get_task_res_state(self, queryset, *arg): if str(arg[1]) == "0":  # arg[1]=('task_res_state', '0') task_res = (1, 2, 3) else: task_res = (0, 4, 5, 6) print(task_res) queryset = queryset.filter(task_res__in=task_res) return queryset class Meta: model = Robot fields = ['robot_id', 'machine_id', "city", "created_start_time", "created_end_time", 'created_time', 'firmware_version', 'state', "robot_type", "hardware_version", "exist_map", 'task_res_state']