我有一些带有时间戳字段的模型:
型号.py

class Event(models.Model):
    event_type = models.CharField(
        max_length=100,
        choices=EVENT_TYPE_CHOICES,
        verbose_name=_("Event Type")
    )
    event_model = models.CharField(
        max_length=100,
        choices=EVENT_MODEL_CHOICES,
        verbose_name=_("Event Model")
    )
    timestamp = models.DateTimeField(auto_now=True, verbose_name=_("Timestamp"))

然后,我将使用django-rest框架为此类创建一个API端点,django-filter提供如下过滤功能:
from .models import Event
from .serializers import EventSerializer
from rest_framework import viewsets, filters
from rest_framework import renderers
from rest_framework_csv import renderers as csv_renderers


class EventsView(viewsets.ReadOnlyModelViewSet):
    """
    A read only view that returns all audit events in JSON or CSV.
    """
    queryset = Event.objects.all()
    renderer_classes = (csv_renderers.CSVRenderer, renderers.JSONRenderer)
    serializer_class = EventSerializer
    filter_backends = (filters.DjangoFilterBackend,)
    filter_fields = ('event_type', 'event_model', 'timestamp')

使用以下设置:
REST_FRAMEWORK = {
    'DEFAULT_FILTER_BACKENDS': ('rest_framework.filters.DjangoFilterBackend',),
}

我可以按event_typeevent_model进行筛选,但按时间戳字段进行筛选时遇到问题。本质上,我想进行一个相当于以下内容的API调用:
AuditEvent.objects.filter(timestamp__gte='2016-01-02 00:00+0000')

我希望我可以这样做:
response = self.client.get("/api/v1/events/?timestamp=2016-01-02 00:00+0000", **{'HTTP_ACCEPT': 'application/json'})

尽管这是不正确的。如何进行返回时间戳大于或等于某个值的所有对象的API调用?

最佳答案

要扩展flaiming的答案,如果您只想通过iso-datetime格式进行过滤,那么覆盖默认值以始终使用IsoDateTimeFilter。这可以通过每个过滤器组来完成,例如

from django.db import models as django_models
import django_filters
from rest_framework import filters
from rest_framework import viewsets

class EventFilter(filters.FilterSet):
    class Meta:
        model = Event
        fields = {
            'timestamp': ('lte', 'gte')
        }

    filter_overrides = {
        django_models.DateTimeField: {
            'filter_class': django_filters.IsoDateTimeFilter
        },
    }

class EventsView(viewsets.ReadOnlyModelViewSet):
    ...
    filter_class = EventFilter

然后,您就不必为每个查找表达式和每个字段设置不同的过滤器了。

10-05 20:37
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