尽管将 PreserveReferencesHandling 设置为“None"，但 Json.Net 仍将 $id 添加到 EF 对象

问题描述

我已经看过 如何在 JSON 序列化期间删除 $id 但给出的答案似乎对我不起作用，我希望有人能找出我做错了什么.

I've already looked at how to remove $id during JSON serialization but the answers given do not seem to be working for me and I hope someone can figure out what I am doing wrong.

这是我的代码:

return JsonConvert.SerializeObject(target, new JsonSerializerSettings {
    NullValueHandling = NullValueHandling.Include,
    PreserveReferencesHandling = PreserveReferencesHandling.None,
    ContractResolver = new CustomContractResolver(),
    Converters = CustomConverters
});

这个输出仍然带有 $id's，但是，仅在实体框架对象上，这是设计使然吗?如果是这样，有什么方法可以防止实体框架对象上的那些 $id ?

The output from this is still coming out with $id's, BUT, only on Entity Framework objects, is this by design? If so, is there any way to prevent those $id's on Entity Framework objects?

推荐答案

自定义 ContractResolver 设置会覆盖 PreserveReferencesHandling 设置.

The custom ContractResolver setting overrides the PreserveReferencesHandling setting.

在 DefaultContractResolver/IContractResolver 的实现中，添加这个；

In your implementation of DefaultContractResolver/IContractResolver, add this;

public override JsonContract ResolveContract(Type type) {
    var contract = base.ResolveContract(type);
    contract.IsReference = false;
    return contract;
}

这与没有自定义 ContractResolver 的 PreserveReferencesHandling.None 设置类似.

This behaves similarly to the PreserveReferencesHandling.None setting without a custom ContractResolver.

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