序列化正反向查詢

序列化（正向查詢）

from rest_framework import serializers

from users.models import userinfo
## 正向查詢
class userinfoserializer(serializers.serializer):
# 類名小寫.外來鍵字段
goods = serializers.charfield(source='goods.type_name',required=false) # 顯示一對多欄位名稱
class meta:
model = userinfo

# 路徑

class pathserializer(serializers.modelserializer):
class meta:
model = path
fields = '__all__'
class jieduanserializer(serializers.modelserializer):
courses = courseserializer(many=true)
class meta:
model = jieduan
fields = '__all__'
class pathdeepserializer(serializers.modelserializer):
jieduan = jieduanserializer(many=true)
class meta:
model = path
fields = '__all__'

''' 一對多序列化（反向查詢）'''

class usertypeserializer(serializers.serializer):
type_name = serializers.charfield()
# 法1一對多關聯物件序列化：此字段將被序列化為關聯物件的主鍵
userinfo_set = serializers.primarykeyrelatedfield(read_only=true, many=true)
# 法2一對多關聯物件序列化：此字段將被序列化為關聯物件的字串表示方式（即__str__方法的返回值）
# userinfo_set = serializers.stringrelatedfield(read_only=true,many=true)
# 法3一對多關聯物件序列化：使用關聯物件的序列化器
# userinfo_set = userinfoserializer(many=true)

from rest_framework import serializers

from users.models import userinfo
## 正向查詢
class userinfoserializer(serializers.serializer):
# 類名小寫.外來鍵字段
goods = serializers.charfield(source='goods.type_name',required=false) # 顯示一對多欄位名稱
class meta:
model = userinfo

# 路徑

class pathserializer(serializers.modelserializer):
class meta:
model = path
fields = '__all__'
class jieduanserializer(serializers.modelserializer):
courses = courseserializer(many=true)
class meta:
model = jieduan
fields = '__all__'
class pathdeepserializer(serializers.modelserializer):
jieduan = jieduanserializer(many=true)
class meta:
model = path
fields = '__all__'

''' 一對多序列化（反向查詢）'''

class usertypeserializer(serializers.serializer):
type_name = serializers.charfield()
# 法1一對多關聯物件序列化：此字段將被序列化為關聯物件的主鍵
userinfo_set = serializers.primarykeyrelatedfield(read_only=true, many=true)
# 法2一對多關聯物件序列化：此字段將被序列化為關聯物件的字串表示方式（即__str__方法的返回值）
# userinfo_set = serializers.stringrelatedfield(read_only=true,many=true)
# 法3一對多關聯物件序列化：使用關聯物件的序列化器
# userinfo_set = userinfoserializer(many=true)

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