在Django REST框架的ModelViewSets中可以使用继承的概念吗？

huangapple
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英文:

Can we use the concept of inheritance in Django rest framework in ModelViewSets?

问题

我正在一遍又一遍地重复我的代码，在不同的ModelViewSets中，唯一变化的是模型的名称。所以，我想为此编写一个基类，并将每个模型的名称作为参数传递，但它不起作用。

有任何帮助吗？

  1. class RemitterQueryViewViewset(viewsets.ModelViewSet):
  2.     queryset = RemitterQueryView.objects.all()
  3.     serializer_class = RemitterQueryViewSerializer
  4.     http_method_names = ['get']
  5.     
  6.     def get_base_path(self):
  7.         splitted_url = self.request.build_absolute_uri().split('?')
  8.         base_url = splitted_url[0]
  9.         return base_url
  11.     def get_queryset(self):
  12.         limit = self.request.query_params.get('limit', 26)
  13.         offset = self.request.query_params.get('offset', 0)
  14.         filter_list = self.request.query_params.get('filter_list', None)
  15.         sort_list = self.request.query_params.get('sort_list', None)
  16.         if filter_list is None and sort_list is None:
  17.             return RemitterQueryView.objects.filter(id__gt=int(offset))[0:int(limit)]
  19.         elif filter_list is not None and sort_list is not None:
  20.             filter_columns = self.get_filter_list()
  21.             sort_columns = self.get_sort_list()
  22.             sort_columns = list(itertools.chain(*sort_columns))
  23.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns).order_by(*sort_columns)[0:int(limit)]
  25.         elif filter_list is None and sort_list is not None:
  26.             sort_columns = self.get_sort_list()
  27.             sort_columns = list(itertools.chain(*sort_columns))
  28.             return RemitterQueryView.objects.filter(id__gt=int(offset)).order_by(*sort_columns)[0:int(limit)]
  30.         elif filter_list is not None and sort_list is None:
  31.             filter_columns = self.get_filter_list()
  32.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns)[0:int(limit)]
英文:

I'm repeating my code, again and again, in different ModelViewSets and the only thing that is changing here is the Model's name. So, I want to write a base class for this and send each model's name as an argument, but its not working.

Any help?

  1. class RemitterQueryViewViewset(viewsets.ModelViewSet):
  2.     queryset = RemitterQueryView.objects.all()
  3.     serializer_class = RemitterQueryViewSerializer
  4.     http_method_names = ['get']
  5.     
  6.     def get_base_path(self):
  7.         splitted_url = self.request.build_absolute_uri().split('?')
  8.         base_url = splitted_url[0]
  9.         return base_url
  11.     def get_queryset(self):
  12.         limit = self.request.query_params.get('limit', 26)
  13.         offset = self.request.query_params.get('offset', 0)
  14.         filter_list = self.request.query_params.get('filter_list', None)
  15.         sort_list = self.request.query_params.get('sort_list', None)
  16.         if filter_list is None and sort_list is None:
  17.             return RemitterQueryView.objects.filter(id__gt=int(offset))[0:int(limit)]
  19.         elif filter_list is not None and sort_list is not None:
  20.             filter_columns = self.get_filter_list()
  21.             sort_columns = self.get_sort_list()
  22.             sort_columns = list(itertools.chain(*sort_columns))
  23.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns).order_by(*sort_columns)[0:int(limit)]
  25.         elif filter_list is None and sort_list is not None:
  26.             sort_columns = self.get_sort_list()
  27.             sort_columns = list(itertools.chain(*sort_columns))
  28.             return RemitterQueryView.objects.filter(id__gt=int(offset)).order_by(*sort_columns)[0:int(limit)]
  30.         elif filter_list is not None and sort_list is None:
  31.             filter_columns = self.get_filter_list()
  32.             # print(filter_columns)
  33.             # print(MockData.objects.filter(id__gt=int(offset), **filter_columns)[0:int(limit)])
  34.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns)[0:int(limit)]

答案1

得分: 1

你可以创建一个通用的混合类，并在所有的类视图中继承这个混合类。

  1. class MixinView:
  3.     def get_base_path(self):
  4.         splitted_url = self.request.build_absolute_uri().split('?')
  5.         base_url = splitted_url[0]
  6.         return base_url
  8.     def get_queryset(self):
  9.         limit = self.request.query_params.get('limit', 26)
  10.         offset = self.request.query_params.get('offset', 0)
  11.         filter_list = self.request.query_params.get('filter_list', None)
  12.         sort_list = self.request.query_params.get('sort_list', None)
  13.         if filter_list is None and sort_list is None:
  14.             return RemitterQueryView.objects.filter(id__gt=int(offset))[0:int(limit)]
  16.         elif filter_list is not None and sort_list is not None:
  17.             filter_columns = self.get_filter_list()
  18.             sort_columns = self.get_sort_list()
  19.             sort_columns = list(itertools.chain(*sort_columns))
  20.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns).order_by(*sort_columns)[0:int(limit)]
  22.         elif filter_list is None and sort_list is not None:
  23.             sort_columns = self.get_sort_list()
  24.             sort_columns = list(itertools.chain(*sort_columns))
  25.             return RemitterQueryView.objects.filter(id__gt=int(offset)).order_by(*sort_columns)[0:int(limit)]
  27.         elif filter_list is not None and sort_list is None:
  28.             filter_columns = self.get_filter_list()
  29.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns)[0:int(limit)]
  32. class RemitterQueryViewViewset(MixinView, viewsets.ModelViewSet):
  33.     queryset = RemitterQueryView.objects.all()
  34.     serializer_class = RemitterQueryViewSerializer
  35.     http_method_names = ['get']

在这里，你的 MixinView 中的 get_queryset 方法将会被执行。

英文:

You can create a common mixin class and inherit this mixin in all CBV.

  1. class MixinView:
  3.     def get_base_path(self):
  4.         splitted_url = self.request.build_absolute_uri().split('?')
  5.         base_url = splitted_url[0]
  6.         return base_url
  8.     def get_queryset(self):
  9.         limit = self.request.query_params.get('limit', 26)
  10.         offset = self.request.query_params.get('offset', 0)
  11.         filter_list = self.request.query_params.get('filter_list', None)
  12.         sort_list = self.request.query_params.get('sort_list', None)
  13.         if filter_list is None and sort_list is None:
  14.             return RemitterQueryView.objects.filter(id__gt=int(offset))[0:int(limit)]
  16.         elif filter_list is not None and sort_list is not None:
  17.             filter_columns = self.get_filter_list()
  18.             sort_columns = self.get_sort_list()
  19.             sort_columns = list(itertools.chain(*sort_columns))
  20.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns).order_by(*sort_columns)[0:int(limit)]
  22.         elif filter_list is None and sort_list is not None:
  23.             sort_columns = self.get_sort_list()
  24.             sort_columns = list(itertools.chain(*sort_columns))
  25.             return RemitterQueryView.objects.filter(id__gt=int(offset)).order_by(*sort_columns)[0:int(limit)]
  27.         elif filter_list is not None and sort_list is None:
  28.             filter_columns = self.get_filter_list()
  29.             # print(filter_columns)
  30.             # print(MockData.objects.filter(id__gt=int(offset), **filter_columns)[0:int(limit)])
  31.             return RemitterQueryView.objects.filter(id__gt=int(offset), **filter_columns)[0:int(limit)]
  34. class RemitterQueryViewViewset(MixinView, viewsets.ModelViewSet):
  35.     queryset = RemitterQueryView.objects.all()
  36.     serializer_class = RemitterQueryViewSerializer
  37.     http_method_names = ['get']

Here your get_queryset method from MixinView will get executed.

huangapple
  • 本文由 发表于 2020年1月3日 16:55:54
  • 转载请务必保留本文链接：https://go.coder-hub.com/59575589.html
  • django
  • django-rest-framework
  • inheritance
  • python-2.7
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