Nest.ConnectionSettings.SetJsonSerializerSettingsModifier甚至可以工作吗?

时间:2015-05-08 09:28:43

标签: elasticsearch nest elasticsearch-net

这是我的问题。由于项目需要,我们必须以相同的格式将我们的日期保存在elasticsearch索引中。我们尝试过的是下一个方法 -

            var connectionPool = new SniffingConnectionPool(nodeList);
            var connectionSettings = new ConnectionSettings(connectionPool)
                 .SetJsonSerializerSettingsModifier(
                  m => m.DateFormatString = "yyyy-MM-ddTHH:mm:ss.fffffffK")
            // other configuration goes here

但它没有成功。通过ES索引搜索,我看到日期的尾随零点丢失(如2015-05-05T18:55:27Z预期2015-05-05T18:55:27.0000000Z)。下一个选项也没有帮助:

            var connectionPool = new SniffingConnectionPool(nodeList);
            var connectionSettings = new ConnectionSettings(connectionPool)
                 .SetJsonSerializerSettingsModifier(m =>
                    {
                        m.Converters.Add(new IsoDateTimeConverter { DateTimeFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK"});
                    })
            // other configuration goes here

在运行时挖掘ElasticClient时,我发现最终有一个合同解析器似乎覆盖了所有这些设置:

          public class ElasticContractResolver : DefaultContractResolver
          {
              protected override JsonContract CreateContract(Type objectType)
              {
                  JsonContract contract = base.CreateContract(objectType);
                  ...
                  if (objectType == typeof(DateTime) || objectType == typeof(DateTime?))
                      contract.Converter = new IsoDateTimeConverter();
                  ...
                  if (this.ConnectionSettings.ContractConverters.HasAny())
                  {
                      foreach (var c in this.ConnectionSettings.ContractConverters)
                      {
                          var converter = c(objectType);
                          if (converter == null)
                              continue;
                          contract.Converter = converter;
                          break;
                      }
                  }

                 return contract;
             }
          }

因此,如果我没有明确指定转换器(通过Connection Settings.AddContractJsonConverters()),我的json设置将会消失,因为 IsoDateTimeConverter 已实例化默认设置,而不是我通过 SetJsonSerializerSettingsModifier 传递的设置。

有没有人遇到过这个问题?或者我只是遗漏了什么?提前谢谢!

1 个答案:

答案 0 :(得分:0)

这就是我根据需要处理自定义日期格式的方式:

public class Document
{
    [ElasticProperty(DateFormat = "yyyy-MM-dd", Type = FieldType.Date)]
    public string CreatedDate { get; set; }
}

client.Index(new Document {CreatedDate = DateTime.Now.ToString("yyyy-MM-dd")});

ES中的文档

{
    "_index": "indexname",
    "_type": "document",
    "_id": "AU04kd4jnBKFIw7rP3gX",
    "_score": 1,
    "_source": {
       "createdDate": "2015-05-09"
    }
}

希望它会对你有所帮助。