(Fresh Project) 13 commodity categories of data interfaces

1. Since the goods and goodscategory table in a model where it is logical classification of merchandise here is also written in goods.views.py

2. First write serializers.py

Import GoodsCategory .models from 

# commodity class interface serialization 
# Let category field displays the total amount of goods of 
class CategorySerializer3 (serializers.ModelSerializer):
     class Meta: 
        Model = GoodsCategory 
        Fields = " __all__ "   # Take all fields 


class CategorySerializer2 (serializers.ModelSerializer) : 
    sub_cat = CategorySerializer3 (MANY = True) # MANY = True, i.e., the field has a plurality of values declared 

    class Meta -: 
        Model = GoodsCategory 
        fields = " __all__ is "  # Take all fields 


class CategorySerializer (serializers.ModelSerializer): 
    sub_cat = CategorySerializer2 (MANY = True)   # MANY = True, i.e., the field has a plurality of values declared 

    class Meta -: 
        Model = GoodsCategory 
        Fields = " __all__ is "   # Take all fields

3. Then write goods.views.py of CategorysViewSet

from .serializers Import CategorySerializer 

# Product Category Interface 
# demand: one nested inside the second-class, second-class nested inside three 
# RetrieveModelMixin function is to help us complete url configuration, / categorys / id, id you can get by typing to an element specified 
class CategoryViewSet (mixins.ListModelMixin, mixins.RetrieveModelMixin, viewsets.GenericViewSet):
     "" " 
    list: 
        Categories list data 
    " "" 
    QuerySet = GoodsCategory.objects.filter (category_type = 1 ) 
    serializer_class = CategorySerializer

4. Finally, to configure url, in principle, we need to provide artificial url to "get some details of a classified" function, but RetrieveModelMixin previously used has completely helped us encapsulate this functionality

Features detailed in the following figure

 

 urls.py

from goods.views Import CategoryViewSet 


# Configure the category url, no separate configuration category / id's URL 
router.register (R & lt ' categorys ' , CategoryViewSet, the basename = " categorys " )   # Router will automatically get to the list, the post go to create a

5. Go to the browser to verify

First checks whether or not the nested loop, and then verify that a particular category can be individually removed, there is no problem as shown below

 

 

 

 

 

 

 

 

 

 

 

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