web.api 仅序列化隐藏字段

Question

我遇到了一个奇怪的行为。我的 web.api 在 GET 请求时仅从我的 ObjectCollection 返回隐藏字段。这是我的控制器：

// GET: api/UserDocuments
[Route("api/UserDocuments/User/{userName}")]
public List<DocIndex> Get(string userName)
{
    User usuari = Humanisme.User.LoadByUserName(userName);
    List<DocIndex> resposta = DocumentCollection.LoadIndexPerUsuari(usuari);
    return resposta;
}

这是从 BOM 生成的对象：

    namespace Humanisme
    {
    using CodeFluent.Runtime;
    using CodeFluent.Runtime.Utilities;


    // CodeFluent Entities generated (http://www.softfluent.com). Date: Tuesday, 01 March 2016 11:52.
    // Build:1.0.61214.0820
    [System.CodeDom.Compiler.GeneratedCodeAttribute("CodeFluent Entities", "1.0.61214.0820")]
    [System.SerializableAttribute()]
    [System.ComponentModel.DataObjectAttribute()]
    public partial class DocIndex : CodeFluent.Runtime.ICodeFluentLightEntity
    {

        private int _id = -1;

        [System.NonSerializedAttribute()]
        private Humanisme.User _user = ((Humanisme.User)(null));

        private string _lat = default(string);

        private string _lon = default(string);

        private string _etapaVital = default(string);

        private string _solvencia = default(string);

        private int _valoracio = CodeFluentPersistence.DefaultInt32Value;

        private System.DateTime _data = CodeFluentPersistence.DefaultDateTimeValue;

        private string _nom = default(string);

        public DocIndex()
        {
        }

        [System.ComponentModel.DefaultValueAttribute(((int)(-1)))]
        [System.Xml.Serialization.XmlElementAttribute(IsNullable=false, Type=typeof(int))]
        [System.ComponentModel.DataObjectFieldAttribute(true)]
        public int Id
        {
            get
            {
                return this._id;
            }
            set
            {
                this._id = value;
            }
        }

        [System.Xml.Serialization.XmlIgnoreAttribute()]
        public Humanisme.User User
        {
            get
            {
                return this._user;
            }
            set
            {
                this._user = value;
            }
        }

        [System.ComponentModel.DefaultValueAttribute(default(string))]
        [System.Xml.Serialization.XmlElementAttribute(IsNullable=true, Type=typeof(string))]
        public string Lat
        {
            get
            {
                return this._lat;
            }
            set
            {
                this._lat = value;
            }
        }

        [System.ComponentModel.DefaultValueAttribute(default(string))]
        [System.Xml.Serialization.XmlElementAttribute(IsNullable=true, Type=typeof(string))]
        public string Lon
        {
            get
            {
                return this._lon;
            }
            set
            {
                this._lon = value;
            }
        }

        [System.ComponentModel.DefaultValueAttribute(default(string))]
        [System.Xml.Serialization.XmlElementAttribute(IsNullable=true, Type=typeof(string))]
        public string EtapaVital
        {
            get
            {
                return this._etapaVital;
            }
            set
            {
                this._etapaVital = value;
            }
        }

        [System.ComponentModel.DefaultValueAttribute(default(string))]
        [System.Xml.Serialization.XmlElementAttribute(IsNullable=true, Type=typeof(string))]
        public string Solvencia
        {
            get
            {
                return this._solvencia;
            }
            set
            {
                this._solvencia = value;
            }
        }

        [System.ComponentModel.DefaultValueAttribute(CodeFluentPersistence.DefaultInt32Value)]
        [System.Xml.Serialization.XmlElementAttribute(IsNullable=false, Type=typeof(int))]
        public int Valoracio
        {
            get
            {
                return this._valoracio;
            }
            set
            {
                this._valoracio = value;
            }
        }

        [System.Xml.Serialization.XmlElementAttribute(IsNullable=false, Type=typeof(System.DateTime))]
        public System.DateTime Data
        {
            get
            {
                return this._data;
            }
            set
            {
                this._data = value;
            }
        }

        [System.ComponentModel.DefaultValueAttribute(default(string))]
        [System.Xml.Serialization.XmlElementAttribute(IsNullable=true, Type=typeof(string))]
        public string Nom
        {
            get
            {
                return this._nom;
            }
            set
            {
                this._nom = value;
            }
        }

        protected virtual void ReadRecord(System.Data.IDataReader reader, CodeFluent.Runtime.CodeFluentReloadOptions options)
        {
            if ((reader == null))
            {
                throw new System.ArgumentNullException("reader");
            }
            if ((((options & CodeFluent.Runtime.CodeFluentReloadOptions.Properties) 
                        == 0) 
                        == false))
            {
                this._id = CodeFluentPersistence.GetReaderValue(reader, "Id", ((int)(-1)));
                this._user = new Humanisme.User();
                CodeFluent.Runtime.CodeFluentLightWeightPersistence.ReadRecord(reader, this._user, null, new CodeFluent.Runtime.Utilities.Pair<string, string>("Id", "User_Id"));
                this._lat = CodeFluentPersistence.GetReaderValue(reader, "Lat", ((string)(default(string))));
                this._lon = CodeFluentPersistence.GetReaderValue(reader, "Lon", ((string)(default(string))));
                this._etapaVital = CodeFluentPersistence.GetReaderValue(reader, "EtapaVital", ((string)(default(string))));
                this._solvencia = CodeFluentPersistence.GetReaderValue(reader, "Solvencia", ((string)(default(string))));
                this._valoracio = CodeFluentPersistence.GetReaderValue(reader, "Valoracio", ((int)(CodeFluentPersistence.DefaultInt32Value)));
                this._data = CodeFluentPersistence.GetReaderValue(reader, "Data", ((System.DateTime)(CodeFluentPersistence.DefaultDateTimeValue)));
                this._nom = CodeFluentPersistence.GetReaderValue(reader, "Nom", ((string)(default(string))));
            }
        }

        void CodeFluent.Runtime.ICodeFluentLightEntity.ReadRecord(System.Data.IDataReader reader)
        {
            this.ReadRecord(reader, CodeFluent.Runtime.CodeFluentReloadOptions.Default);
        }
    }
}

正在调用 web.api get 方法 returns 这个 JSON:

[
  {
    "_id": 1,
    "_lat": null,
    "_lon": null,
    "_etapaVital": null,
    "_solvencia": null,
    "_valoracio": 0,
    "_data": "0001-01-01T00:00:00",
    "_nom": null
  }
]

序列化器（来自 WebApiConfig.cs）

JsonMediaTypeFormatter jsonFormatter = (JsonMediaTypeFormatter)config.Formatters.FirstOrDefault(f => f is JsonMediaTypeFormatter);
        if (jsonFormatter != null)
        {
           // jsonFormatter.SerializerSettings.NullValueHandling = NullValueHandling.Include;
            jsonFormatter.UseDataContractJsonSerializer = true;
        }

Answer 1

CodeFluent Entities生成的类被SerializableAttribute修饰。此属性更改 Json.NET 序列化或反序列化对象的方式。您可以配置 Json.NET 忽略此属性：

JsonMediaTypeFormatter jsonFormatter = (JsonMediaTypeFormatter)config.Formatters.FirstOrDefault(f => f is JsonMediaTypeFormatter);
if (jsonFormatter != null)
{
    jsonFormatter.SerializerSettings.ContractResolver = new DefaultContractResolver()
    {
        IgnoreSerializableAttribute = true
    };
}

http://james.newtonking.com/archive/2012/04/11/json-net-4-5-release-2-serializable-support-and-bug-fixes

Json.NET now detects types that have the SerializableAttribute and serializes all the fields on that type, both public and private, and ignores the propertie

因此您可以使用将添加 DataMemberAttribute 的服务生产者，或者您可以使用 Json.NET Aspect 自动添加特定的 Json.NET 属性：Newtonsoft.Json.JsonObjectAttribute 和 Newtonsoft.Json.JsonPropertyAttribute.

Answer 2

终于找到了！

在处理 web.api 时，永远，永远，永远不要忘记在您的模型项目中添加附加到标准 BOM 生产者的 "Service Producer" 子生产者。

你永远不会注意到任何问题，但在序列化时不会处理任何属性，并且只有隐藏的属性（对象字段）会在输出时序列化。

为书呆子的错误感到抱歉，为吸取教训感到高兴。

再次感谢 Meziantou。你永远想不出问题出在哪里，主要是因为我没有把所有的项目细节都带到问题中。

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