类别子类别未正确显示 drf django

huangapple
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英文:

category subcategory not showing properly drf django

问题

I have this category models:

  1. class Category(MPTTModel):
  2.     name = models.CharField(max_length=100)
  3.     slug = models.SlugField()
  4.     parent = TreeForeignKey('self', blank=True, null=True, related_name='children', on_delete=models.CASCADE, db_index=True)
  6.     class MPTTMeta:
  7.         unique_together = ('slug', 'parent')
  8.         verbose_name_plural = "categories"
  9.         order_insertion_by = ['name']
  11.     def __str__(self):
  12.         full_path = [self.name]
  13.         k = self.parent
  14.         while k is not None:
  15.             full_path.append(k.name)
  16.             k = k.parent
  17.         return ' -> '.join(full_path[::-1])

Serializers.py:

  1. # category Listing Api
  3. class CategorySerializers(serializers.ModelSerializer):
  4.     class Meta:
  5.         model = Category
  6.         fields = ('id', 'name', 'slug', 'children')
  8.     def get_fields(self):
  9.         fields = super().get_fields()
  10.         fields['children'] = CategorySerializer(many=True, read_only=True)
  11.         return fields

Views.py:

  1. class CategoryView(generics.ListCreateAPIView):
  2.     queryset = Category.objects.filter(parent__isnull=True)
  3.     serializer_class = CategorySerializers

Currently, it's working, but I want to show subcategories inside categories only, not as main categories. As you can see, subcategories are listed inside main categories and with main categories also.

I am expecting this result:

  1. [
  2.     {
  3.         "id": 1,
  4.         "name": "Animals & Wildlife",
  5.         "slug": "animals_wildlife",
  6.         "children": []
  7.     },
  8.     {
  9.         "id": 2,
  10.         "name": "main cat",
  11.         "slug": "mai_cat",
  12.         "children": [
  13.             {
  14.                 "id": 3,
  15.                 "name": "sub_cat",
  16.                 "slug": "submaincat",
  17.                 "children": []
  18.             }
  19.         ]
  20.     },
  21.     {
  22.         "id": 4,
  23.         "name": "maincat2",
  24.         "slug": "maincat2",
  25.         "children": [
  26.             {
  27.                 "id": 5,
  28.                 "name": "submaincat2",
  29.                 "slug": "submaincat2",
  30.                 "children": []
  31.             }
  32.         ]
  33.     },
  34.     {
  35.         "id": 6,
  36.         "name": "maincat3",
  37.         "slug": "maincat3",
  38.         "children": []
  39.     }
  40. ]

Please let me know if you need any further assistance.

英文:

i have this category models:

  1. class Category(MPTTModel):
  2.       name = models.CharField(max_length = 100)
  3.       slug = models.SlugField()   
  4.       parent = TreeForeignKey('self',blank=True, null=True, related_name='children', on_delete=models.CASCADE, db_index = True)
  7.      class MPTTMeta:
  8.            unique_together = ('slug', 'parent') 
  9.            verbose_name_plural = "categories"
  10.            order_insertion_by = ['name']
  12.     def __str__(self):  
  13.         full_path = [self.name]       
  14.         k = self.parent       
  15.         while k is not None:
  16.               full_path.append(k.name)
  17.                k = k.parent
  18.         return ' -> '.join(full_path[::-1])

serializers.py:

category Listing Api

  1. class CategorySerializers(serializers.ModelSerializer):
  2.       class Meta:
  3.             model = Category
  4.             fields = ('id','name','slug','children')
  6.       def get_fields(self):
  7.           fields = super().get_fields()
  8.           fields['children'] = CategorySerializer(many=True, read_only=True)
  9.          return fields

views.py:

  1. class CategoryView(generics.ListCreateAPIView):
  2.       queryset = Category.objects.filter(parent__isnull=True)
  3.       serializer_class = CategorySerializers

currently its working but i want to show subcategory inside category only not as a main category as you can see subcategory are listed inside main category and with maincategory also

类别子类别未正确显示 drf django

I am expecting this result:

  1.    [
  2.    {
  3.         "id": 1,
  4.         "name": "Animals & Wildlife",
  5.         "slug": "animals_wildlife",
  6.         "children": []
  7.    },
  8.    {
  9.         "id": 2,
  10.         "name": "main cat",
  11.         "slug": "mai_cat",
  12.         "children": [
  13.         {
  14.             "id": 3,
  15.             "name": "sub_cat",
  16.             "slug": "submaincat",
  17.             "children": []
  18.         }
  19.     ]
  20.    },
  22. {
  23.     "id": 4,
  24.     "name": "maincat2",
  25.     "slug": "maincat2",
  26.     "children": [
  27.         {
  28.             "id": 5,
  29.             "name": "submaincat2",
  30.             "slug": "submaincat2",
  31.             "children": []
  32.         }
  33.     ]
  34. },
  36. {
  37.     "id": 6,
  38.     "name": "maincat3",
  39.     "slug": "maincat3",
  40.     "children": []
  41. }
  42. ]

...............................................

答案1

得分: 1

将您的视图集更改为

  1. class CategoryViewSet(ModelViewSet):
  2.     queryset = Category.objects.filter(parent__isnull=True)
  3.     serializer_class = CategorySerializer

和序列化器更改为

  1. class CategorySerializer(serializers.ModelSerializer):
  2.     class Meta:
  3.         model = Category
  4.         fields = ('id', 'name', 'slug')
  6.     def get_fields(self):
  7.         fields = super().get_fields()
  8.         fields['children'] = CategorySerializer(many=True, read_only=True)
  9.         return fields
英文:

Change your viewset to

  1.  class CategoryViewSet(ModelViewSet):
  2.      queryset = Category.objects.filter(parent__isnull=True)
  3.      serializer_class = CategorySerializer

and serializer to

  1.  class CategorySerializer(serializers.ModelSerializer):
  3.      class Meta:
  4.          model = Category
  5.          fields = ('id', 'name', 'slug')
  7.      def get_fields(self):
  8.          fields = super().get_fields()
  9.          fields['children'] = CategorySerializer(many=True, read_only=True)
  10.          return fields

huangapple
  • 本文由 发表于 2020年1月3日 16:09:24
  • 转载请务必保留本文链接：https://go.coder-hub.com/59575119.html
  • django
  • django-rest-framework
  • python-3.x
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