Drf 序列化 ModelSerializer跨表取数据

 

1、对于OneToOne、Foreignkey、choices字段可以使用source取出相关信息：

class CourseSerializer(serializers.ModelSerializer): # choices字段 degree = serializers.CharField(source='get_degree_display') # ForeignKey字段 teacher = serializers.CharField(source='teacher.name') class Meta: model = Course fields = '__all__' 

2、对于ManyToMany字段，例如：

class BookSerializers(serializers.ModelSerializer): authors = serializers.SerializerMethodField() publisher = serializers.CharField(source='publisher.title') class Meta: model = Book fields = "__all__" # 可选择显示字段 # exclude = ['price',] # 排除字段 def get_authors(self,obj): query_set = obj.authors.all() return [{'name':obj.name} for obj in query_set] { "id": 2, "authors": [ { "name": "蒋勋" } ], "publisher": "长江出版社", "title": "蒋勋说唐诗", "pub_date": "2018-11-04", "word_count": 12, "price": 34 }