Question

想象一下有三个 Django 模型：

ActualMessage: "A possible object cycle was detected. This can either be due to a cycle or if the object depth is larger than the maximum allowed depth of 64. Consider using ReferenceHandler.Preserve on JsonSerializerOptions to support cycles."
BytePositionInLine: null
ClassName: "System.Text.Json.JsonException"
Data: null
ExceptionMethod: null
HResult: -2146233088
HelpURL: null
InnerException: null
LineNumber: null
Message: "A possible object cycle was detected. This can either be due to a cycle or if the object depth is larger than the maximum allowed depth of 64. Consider using ReferenceHandler.Preserve on JsonSerializerOptions to support cycles."
Path: "$.requestorRoles.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.Claims.Subject.AuthenticationType"
RemoteStackIndex: 0
RemoteStackTraceString: null
Source: "System.Text.Json"
StackTraceString: "   at System.Text.Json.ThrowHelper.ThrowJsonExcep
WatsonBuckets: null

我想为 class A: Susu = models.CharField() # props... class B: a = models.ForeignKey(A) Bar = models.CharField() # props... class C: b = models.ForeignKey(B) c_prop # props... 对象编写一个序列化程序，以便将它们表示为

即{ "c_prop": "Foo", "b" : { "Bar": "Agu" }, "a" : { "Susu", "Jaja" } } 类的外键表示在与 B 对象相同的嵌套级别（而不是“内”B）

我有这些序列化程序：

Answer 1

你可以这样使用SerializerMethodField

a = serializers.SerializerMethodField()

def get_a(self,obj):
    a = A.objects.filter(b__c=obj)
    return ASerializer(a, many=True).data

如何在 Django REST Framework 序列化程序中获取相关字段的相关字段？

1 个答案: