我有一个网络应用程序来搜索汽车。在登录页面上，我可以输入关键字并进行搜索，也可以转到显示带有过滤器的所有数据的链接。所以我的网址，
url(r'^cars/$', search, name='search'), ==> does an elastic search
url(r'^select/', select, name='select'),==> has links to filter results and pass query set
[当我输入关键字（例如Audi）并进行搜索时，URL变为localhost：8000 / cars /？search = Audi如果我单击链接，它只会显示localhost：8000 / select /
这两个视图（搜索和选择）均呈现相同的模板。现在，我想过滤结果或添加更多条件。什么是正确的方法来做到这一点？我受启发进行此项目的网站之一只是重定向到/ cars？search = Audi并单击任何链接以过滤对/ cars / Audi / BMW / Sedan的重定向在Django中有可能吗？
这里是选择视图代码。我仍在学习Django和python，因此，请多多包涵。
def select(request):
q1 = request.GET.get('brand')
q2 = request.GET.get('model')
q3 = request.GET.get('bodyStyle')
q4 = request.GET.get('budget[]')
q5 = request.GET.get('transmission')
page = request.GET.get('page', 1)
print(q1)
s1 = request.POST.get('sortBy')
budarray = request.GET.getlist('budget')
brandarray = request.GET.getlist('brand')
modelarray = request.GET.getlist('model')
bodyarray = request.GET.getlist('bodyStyle')
transmissionarray = request.GET.getlist('transmission')
cars = product_details.objects.all()
posturl=""
if len(brandarray)>0:
brandarray=list(dict.fromkeys(brandarray))
cars = cars.filter(brand_name__in=brandarray)
if len(modelarray)>0:
cars = cars.filter(model_name__in=modelarray)
if len(bodyarray)>0:
cars = cars.filter(bodystyle__in=bodyarray)
if len(transmissionarray)>0:
cars = cars.filter(transmission__in=transmissionarray)
minp=0
maxp=0
denom=""
arraybud =[]
if len(budarray)>0:
for items in budarray:
budgetval = GetBudget(items)
minp=int(budgetval[0])
maxp=int(budgetval[1])
denom=budgetval[2]
arraybud.append(minp)
arraybud.append(maxp)
minprice=0
maxprice=0
if len(budarray)>0:
minprice=min(arraybud)
maxprice=max(arraybud)
if minp>100:
cars=cars.filter(min_price__gt=minprice).filter(denomination='Crore')
denom="Crores"
else:
denom="Lakhs"
cars=cars.filter(min_price__gt=minprice,min_price__lt=maxprice).filter(denomination=denom)
sort = GetOrderBy(s1)
if sort =="nothing":
cars = cars.order_by('model_name','min_price')
else:
cars = cars.order_by('model_name',sort)
cars = cars.distinct('model_name')
totalResult = cars.count()
if totalResult >= 50:
paginator = Paginator(cars, 25)
else:
paginator = Paginator(cars, 10)
try:
cars = paginator.page(page)
except PageNotAnInteger:
cars = paginator.page(1)
except EmptyPage:
cars = paginator.page(paginator.num_pages)
print(request.get_full_path)
_brands = products.objects.all()
_models= product_models.objects.all()
_bodystyles = product_bodystyle.objects.all()
posturl = "Y"
hyundaicars = product_details.objects.filter(brand_name='Hyundai').distinct('model_name')
tatamotors = product_details.objects.filter(brand_name='Tata').distinct('model_name')
maruticars = product_details.objects.filter(brand_name='Maruti Suzuki').distinct('model_name')
mahindracars = product_details.objects.filter(brand_name='Mahindra').distinct('model_name')
hondacars = product_details.objects.filter(brand_name='Honda').distinct('model_name')
for (i, item) in enumerate(budarray):
if item == "1":
budarray[i] = "1 - 5 Lakhs"
if item == "2":
budarray[i] = "5 - 10 Lakhs"
if item == "3":
budarray[i] = "10 - 15 Lakhs"
if item == "4":
budarray[i] = "15 - 20 Lakhs"
if item == "5":
budarray[i] = "20 - 25 Lakhs"
if item == "6":
budarray[i] = "25 - 50 Lakhs"
if item == "7":
budarray[i] = "50 - 99 Lakhs"
if item == "8":
budarray[i] = "Above 1 Crore"
return render(request, 'search/search_results.html', carsdetails)
可以这样做：
文件views.py：
from rest_framework.generics import ListAPIView
from rest_framework.filters import DjangoFilterBackend, OrderingFilter
from rest_framework.renderers import TemplateHTMLRenderer
class RetrieveCarView(ListAPIView):
queryset = product_details.objects.all()
model = product_details
filter_class = ProductDetailsFilter
filter_backends = (OrderingFilter, DjangoFilterBackend)
ordering_fields = ('brand', )
pagination_class = LargeResultsSetPagination
serializer_class = ProductDetailsSerializer
renderer_classes = (TemplateHTMLRenderer,)
template_name = 'search/search_results.html'
文件serializers.py
class ProductDetailsSerializer(ModelSerializer):
class Meta:
model = DeviceAttachment
fields = ('brand', 'model', 'bodyStyle', 'transmission')
# in fields it`s needed to list fields from product_details which will be shown in html template
文件filters.py
import rest_framework_filters as filters
class ProductDetailsFilter(filters.FilterSet):
# here are defined fields by which there is a need to filter
brand = filters.AllLookupsFilter(name='brand')
bodyStyle = filters.AllLookupsFilter(name='bodyStyle')
transmission = filters.AllLookupsFilter(name='transmission')
budget = filters.AllLookupsFilter(name='budget')
model = filters.AllLookupsFilter(name='model')
class Meta:
model = product_details
fields = {
'brand': ['exact', 'in'],
'bodyStyle: ['exact', 'in'],
'transmission': ['exact', 'in'],
'budget': ['exact', 'in'],
'model': ['exact', 'in']
}
file paginators.py
class from rest_framework.pagination import PageNumberPagination
from rest_framework.response import Response
class LargeResultsSetPagination(PageNumberPagination):
page_size = 100
page_size_query_param = 'page_size'
max_page_size = 1000
def get_paginated_response(self, data):
return Response(data)
最后，您将可以通过这种方式进行过滤：
select /？model = Audi＆transmission__in = 1,2＆page = 1＆page_size = 1