索引派生的 [ElasticType] 仅序列化基础 class' 属性

Indexing a derived [ElasticType] only serializes the base class' properties

对于我的生活,我无法弄清楚为什么 Nest 在索引实例时只序列化下面的基础 class' 属性,即使我告诉它索引派生的 class .

基地class:

[ElasticType(Name = "activity")]
public class Activity
{
    [ElasticProperty(Name = "name")]
    public string Name { get; set; }

    [ElasticProperty(OptOut = true)]
    public DateTimeOffset Timestamp
    {
        get { return DateTimeOffset.ParseExact(TimestampAsString, "yyyyMMddTHHmmssZ", CultureInfo.InvariantCulture).ToUniversalTime(); }
        set { TimestampAsString = value.ToString("yyyyMMddTHHmmssZ"); }
    }

    [Obsolete("Use Timestamp, instead.")]
    [ElasticProperty(Name = "timestamp")]
    public string TimestampAsString { get; set; }

    [ElasticProperty(Name = "application")]
    public string Application { get; set; }

    [ElasticProperty(Name = "application_version")]
    public string ApplicationVersion { get; set; }

    [ElasticProperty(OptOut = true)]
    public IPAddress RemoteIpAddress
    {
        get { return IPAddress.Parse(RemoteIpAddressAsString); }
        set { RemoteIpAddressAsString = value.ToString(); }
    }

    [Obsolete("Use RemoteIpAddress, instead.")]
    [ElasticProperty(Name = "remote_ip_address")]
    public string RemoteIpAddressAsString { get; set; }
}

派生class:

private class SearchCountsRetrievedActivity : Activity
{
    [ElasticProperty(OptOut = true)]
    public PunctuationlessGuid? PrincipalIdentityId
    {
        set { PrincipalIdentityIdAsString = value; }
    }

    [ElasticProperty(Name = "principal_identity_id")]
    public string PrincipalIdentityIdAsString { get; set; }
}

我的索引包装方法:

public Task IndexActivityAsync<TActivity>(TActivity activity)
    where TActivity : Activity
{
    return _client.IndexAsync(activity);
}

无论我做什么,通过网络发送的序列化 JSON 仅包含 Activity class' 属性。我尝试过的:

显然,底层默认的 JSON 序列化程序 而不是 序列化具有 null 值的属性。在我的例子中,我的 属性 值是 null,所以这就是它们没有被序列化的原因。当值不是 null.

时,序列化器可以正常工作