重新学习serializer

apps/music/serializer.py

@@ -3,13 +3,43 @@ from rest_framework import serializers, fields
 from apps.music.models import *
 
 
-class AlbumSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = Album
-        fields = ('id', 'artist', 'name', 'release_date', 'num_stars')
+class AlbumSerializer(serializers.Serializer):
+    # 设置外键PrimaryKeyRelatedField
+    artist = serializers.PrimaryKeyRelatedField(label='音乐家', queryset=Musician.objects.all(), many=False,
+                                                allow_null=False)
+    name = serializers.CharField(label='专辑名', required=True, max_length=10)
+    # 修改字段名称并映射数据模型字段，source为指定模型的字段的字符串形式
+    publish_date = serializers.DateField(label='发行日期', required=False, source='Album.release_date')
+    num_stars = serializers.IntegerField(label='好评度')
+
+
+class MusicianSerializer(serializers.Serializer):
+    first_name = serializers.CharField(max_length=20, required=True)
+    last_name = serializers.CharField(max_length=20, required=True)
+    instrument = serializers.CharField(max_length=50)
+    # 根据外键的关联关系，将AlbumNameSerializer做为扩展信息
+    album_musician = AlbumSerializer(many=True)
+
+    # 重写create方法
+    def create(self, validated_data):
+        albums_data = validated_data.pop('album_musician')
+        musician = Musician.objects.create(**validated_data)
+        # 插入专辑数据，artist为上一步中插入后返回的对象
+        for album in albums_data:
+            Album.objects.create(artist=musician, **album)
+        return musician
+
+    def update(self, instance, validated_data):
+        pass
+
+
+# class AlbumModelSerializer(serializers.ModelSerializer):
+#     class Meta:
+#         model = Album
+#         fields = ('id', 'artist', 'name', 'release_date', 'num_stars')
 
 
-class MusicianSerializer(serializers.ModelSerializer):
+class MusicianModelSerializer(serializers.ModelSerializer):
     # album_musician = AlbumSerializer(read_only=True, many=True)  # 定义只读外键字段后在fields中添加此键
     album_musician = AlbumSerializer(many=True)  # 定义只读外键字段后在fields中添加此键，如果需要写入create和update方法，则不应设置readonly