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Question

我正在尝试从Django（即http://localhost:8000/search/Tesco/apples）进行查询，以获取json列表的查询，如下所示。

[
    {
        "id": 12,
        "Date": "2018-08-02",
        "Title": "Rosedene Farms Small Sweet Apple 520G",
        "Price": 0.96,
        "PricePerWeight": "1.85/kg",
        "FinalOffer": "undefined undefined",
        "ProductID": 292249576
    },

我的urls.py：

from django.conf.urls import url, include
from . import views
from rest_framework import routers

router = routers.DefaultRouter()
router.register('Tesco', views.TescoView)

urlpatterns = [
    url('', include(router.urls), name='search'),
    url(r'^search/', include(router.urls), name='searchTwo')

我的views.py

from __future__ import unicode_literals

from django.shortcuts import render
from rest_framework import viewsets
from .models import Tesco
from .serializers import TescoSerializers
from django.core.urlresolvers import reverse_lazy, reverse


class TescoView(viewsets.ModelViewSet):

    queryset = Tesco.objects.filter(Title__icontains='apple')
    serializer_class = TescoSerializers

如何获取URL http://localhost:8000/search/tesco/以便通过数据库查询json列表？

Answer 1

我不认为搜索是这样的：

http://localhost:8000/search/Tesco/apples

是Django Rest Framework（DRF）中的正常模式，所以我想尝试使该模式与DRF配合使用会遇到很多阻力。如果我建议的话，我相信您在X-Y Problem space-"That is, you are trying to solve problem X, and you think solution Y would work, but instead of asking about X when you run into trouble, you ask about Y."

中

通常，过滤参数是在模型的列表视图上指定的。对于您的模型，可以在以下位置找到完整的Tesco实例清单：

http://localhost:8000/Tesco/

如果要对此进行过滤，可以在?之后附加查询参数，例如：

http://localhost:8000/Tesco/?title__icontains=apple

或

http://localhost:8000/Tesco/?ProductID=292249576

或多个搜索过滤器，例如：

http://localhost:8000/Tesco/?ProductID=292249576&title__icontains=apple

要使用 this 模式，您需要修改视图集并添加FilterSet。这是您的views.py文件的样子：

from __future__ import unicode_literals

from django.shortcuts import render
from rest_framework import viewsets
from .models import Tesco
from .serializers import TescoSerializers
from django.core.urlresolvers import reverse_lazy, reverse
# Import filtering libraries
import django_filters 
from rest_framework import filters


class TescoFilterSet(django_filter.FilterSet):
    title__icontains = django_filter.Filter('Title', lookup_expr='icontains')
    class Meta:
        model = Tesco
        fields = ('title__icontains', 'ProductID')


class TescoView(viewsets.ModelViewSet):

    queryset = Tesco.objects.filter(Title__icontains='apple')
    serializer_class = TescoSerializers

    # Hook up filterset
    filter_backends = (django_filters.rest_framework.DjangoFilterBackend, filters.OrderingFilter,)
    filter_class = TescoFilterSet

    # allow ordering on any field
    ordering_fields = '__all__'

以我的经验，当您进入内容缓存时，nginx和apache网络服务器似乎可以很好地使用这种模式。

有关过滤的更多信息，请参见DRF guide on Filtering.

订购

根据您的评论，您可以通过指定order_fields来订购（如上所示）。然后，您可以添加ordering参数。

                                                     vvvvvvvvvvvvvv    
 http://localhost:8000/Tesco/?title__icontains=apple&ordering=price

这将是上升价格。

在-之前添加price，顺序相反或降序：

 http://localhost:8000/Tesco/?title__icontains=apple&ordering=-price
                                                              ^

Django 1.11.15和查询字符串参数

1 个答案:

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