为 NEST 序列化覆盖一种特定类型的最简单的方法是什么
What is the most dirt simple way to override one specific type for NEST serialization
我有一个复杂的文档,它在各种不同的子项中有一个自定义日期字段,即:
var doc = new Document
{
MyCustomDateTime StartTime
Matches = new []
{
MyCustomDateTime StartTime
MyCustomDateTime EndTime
}
}
不使用 属性 属性 因为这种类型是从 dll 中提取的,我可以覆盖类型 [=13 的序列化和反序列化的最简单方法是什么=].
我正在寻找类似于或扩展默认序列化器 class 的东西来处理一种额外的类型:
settings.DefaultSerializerFor<MyCustomDateTime>(d => MyConverter.ToString(d), d => MyConverter.FromString(d));
或类似的东西:
public class MyCustomSerializer : DefaultElasticSearchSerializer
{
public string OnSerialize(object member)
{
if (member is MyCustomDateTime) { return MyConverter.ToString(d); }
return base.OnSerialize(member);
}
...
}
现在,它似乎只发布对象的 public 属性。不幸的是,对于这个特定的 class.
,这不是我正在寻找的行为
实现自定义序列化的最简单方法是
- 连接 JsonNetSerializer
- 为您的类型定义转换器
- 使用 JsonNetSerializer 注册它
一个例子
private static void Main()
{
var defaultIndex = "default_index";
var pool = new SingleNodeConnectionPool(new Uri($"http://localhost:9200"));
var settings = new ConnectionSettings(
pool,
(builtin, settings) => new JsonNetSerializer(builtin, settings, contractJsonConverters: new List<JsonConverter>
{
new MyCustomDateTimeConverter()
}))
.DefaultIndex(defaultIndex);
var client = new ElasticClient(settings);
var indexResponse = client.Index(
new MyDocument {
Message = "message",
CustomDateTime = new MyCustomDateTime
{
Custom = new DateTimeOffset(2022,1,9,14,0,0,0, TimeSpan.FromHours(10))
}
}, i => i.Id(1));
}
public class MyCustomDateTime
{
public DateTimeOffset Custom { get; set; }
}
public class MyCustomDateTimeConverter : JsonConverter<MyCustomDateTime>
{
public override void WriteJson(JsonWriter writer, MyCustomDateTime value, JsonSerializer serializer)
{
writer.WriteValue(value.Custom);
}
public override MyCustomDateTime ReadJson(JsonReader reader, Type objectType, MyCustomDateTime existingValue, bool hasExistingValue, JsonSerializer serializer)
{
var dateTime = reader.ReadAsDateTimeOffset();
return dateTime is null ? null : new MyCustomDateTime { Custom = dateTime.Value };
}
}
public class MyDocument
{
public string Message {get;set;}
public MyCustomDateTime CustomDateTime {get;set;}
}
产量
PUT http://localhost:9200/default_index/_doc/1?pretty=true
{
"message": "message",
"customDateTime": "2022-01-09T14:00:00+10:00"
}
我有一个复杂的文档,它在各种不同的子项中有一个自定义日期字段,即:
var doc = new Document
{
MyCustomDateTime StartTime
Matches = new []
{
MyCustomDateTime StartTime
MyCustomDateTime EndTime
}
}
不使用 属性 属性 因为这种类型是从 dll 中提取的,我可以覆盖类型 [=13 的序列化和反序列化的最简单方法是什么=].
我正在寻找类似于或扩展默认序列化器 class 的东西来处理一种额外的类型:
settings.DefaultSerializerFor<MyCustomDateTime>(d => MyConverter.ToString(d), d => MyConverter.FromString(d));
或类似的东西:
public class MyCustomSerializer : DefaultElasticSearchSerializer
{
public string OnSerialize(object member)
{
if (member is MyCustomDateTime) { return MyConverter.ToString(d); }
return base.OnSerialize(member);
}
...
}
现在,它似乎只发布对象的 public 属性。不幸的是,对于这个特定的 class.
,这不是我正在寻找的行为实现自定义序列化的最简单方法是
- 连接 JsonNetSerializer
- 为您的类型定义转换器
- 使用 JsonNetSerializer 注册它
一个例子
private static void Main()
{
var defaultIndex = "default_index";
var pool = new SingleNodeConnectionPool(new Uri($"http://localhost:9200"));
var settings = new ConnectionSettings(
pool,
(builtin, settings) => new JsonNetSerializer(builtin, settings, contractJsonConverters: new List<JsonConverter>
{
new MyCustomDateTimeConverter()
}))
.DefaultIndex(defaultIndex);
var client = new ElasticClient(settings);
var indexResponse = client.Index(
new MyDocument {
Message = "message",
CustomDateTime = new MyCustomDateTime
{
Custom = new DateTimeOffset(2022,1,9,14,0,0,0, TimeSpan.FromHours(10))
}
}, i => i.Id(1));
}
public class MyCustomDateTime
{
public DateTimeOffset Custom { get; set; }
}
public class MyCustomDateTimeConverter : JsonConverter<MyCustomDateTime>
{
public override void WriteJson(JsonWriter writer, MyCustomDateTime value, JsonSerializer serializer)
{
writer.WriteValue(value.Custom);
}
public override MyCustomDateTime ReadJson(JsonReader reader, Type objectType, MyCustomDateTime existingValue, bool hasExistingValue, JsonSerializer serializer)
{
var dateTime = reader.ReadAsDateTimeOffset();
return dateTime is null ? null : new MyCustomDateTime { Custom = dateTime.Value };
}
}
public class MyDocument
{
public string Message {get;set;}
public MyCustomDateTime CustomDateTime {get;set;}
}
产量
PUT http://localhost:9200/default_index/_doc/1?pretty=true
{
"message": "message",
"customDateTime": "2022-01-09T14:00:00+10:00"
}