Django Rest訂購定製

Question

我正在使用django rest框架，我想用自定義方法訂購。

所以，當我把這個網址，例如：http://127.0.0.1:8000/api/sets/?ordering=partMissing

有可能調用自定義的方法，因爲我想與秩序的一部分，由片段缺失的數量。我計算了多對多領域中的部分數量之和。

非常感謝您的回答。

Answer 1

我有非常簡單的POC，應該允許你實現更復雜的解決方案。

views.py

from rest_framework import viewsets 

from ordering_test.models import Test 
from ordering_test.ordering import MyCustomOrdering 
from ordering_test.serializers import TestSerializer 


class TestViewSet(viewsets.ModelViewSet): 
    queryset = Test.objects.all() 
    serializer_class = TestSerializer 
    filter_backends = (MyCustomOrdering,) 

ordering.py

from rest_framework.filters import OrderingFilter 


class MyCustomOrdering(OrderingFilter): 

    allowed_custom_filters = ['testMethod'] 

    def get_ordering(self, request, queryset, view): 
     """ 
     Ordering is set by a comma delimited ?ordering=... query parameter. 

     The `ordering` query parameter can be overridden by setting 
     the `ordering_param` value on the OrderingFilter or by 
     specifying an `ORDERING_PARAM` value in the API settings. 
     """ 
     params = request.query_params.get(self.ordering_param) 

     if params: 
      fields = [param.strip() for param in params.split(',')] 
      # care with that - this will alow only custom ordering! 
      ordering = [f for f in fields if f in self.allowed_custom_filters] 
      if ordering: 
       return ordering 

     # No ordering was included, or all the ordering fields were invalid 
     return self.get_default_ordering(view) 

    def filter_queryset(self, request, queryset, view): 

     ordering = self.get_ordering(request, queryset, view) 
     if ordering: 
      # implement a custom ordering here 
      ordering = ['-id'] 

     if ordering: 
      return queryset.order_by(*ordering) 

     return queryset 

的models.py和serializers.py很簡單，但在這裏把它：

models.py

從django.db進口車型

class Test(models.Model): 
    test = models.CharField(max_length=120) 
    test1 = models.CharField(max_length=120) 

serializers.py

from rest_framework import serializers 

from ordering_test.models import Test 


class TestSerializer(serializers.ModelSerializer): 

    class Meta: 
     model = Test 
     fields = ('test', 'test1') 

編碼愉快！