Log JSON data to flattened field

[tdsrhh]

Hi

I am trying to log json data this way :

Logger.Debug("{data}", TmpMessage);

The field type [data} is defined with type=flattened.

The json (TmpMessage ) data looks like this :

"{"Message":"This is a test message","System":{"Runtime":{"OS":"Microsoft Windows 10.0.19045 ","Framework":{"Version":"4.8.4515.0","Name":".NETFramework"}},"Process":{"Id":1264,"Name":"ConsoleApp1","Framework":{"Version":"4.8","Name":".NETFramework"}},"Thread":{"Id":1,"Name":"","Culture":"en-GB"}}}"

I get the following error
2022-12-14T07:25:55.0360164Z Failed to store event with template '{data}' into Elasticsearch. Elasticsearch reports for index tds-logs-2022.12.14 the following: {"type":"mapper_parsing_exception","reason":"failed to parse field [data] of type [flattened] in document with id 'GzCGD4UBL6pipuqmjn3U'. Preview of field's value: {"Message":"This is a test message","System":{"Runtime":{"OS":"Microsoft Windows 10.0.19045 ","Framework":{"Version":"4.8.4515.0","Name":".NETFramework"}},"Process":{"Id":1264,"Name":"ConsoleApp1","Framework":{"Version":"4.8","Name":".NETFramework"}},"Thread":{"Id":1,"Name":"","Culture":"en-GB"'","caused_by":{"type":"parsing_exception","reason":"Failed to parse object: expecting token of type [START_OBJECT] but found [VALUE_STRING]","line":1,"col":80}}

Any ideas how to solve this ?

Regards

[tdsrhh]

Trying this from postman works 👍

{ "data": {"Message":"This is a test message","System":{"Runtime":{"OS":"Microsoft Windows 10.0.19045 ","Framework":{"Version":"4.8.4515.0","Name":".NETFramework"}},"Process":{"Id":1264,"Name":"ConsoleApp1","Framework":{"Version":"4.8","Name":".NETFramework"}},"Thread":{"Id":1,"Name":"","Culture":"en-GB"}}}}

So, how can I acchive the same from the serilog sink ?

Regards
'

[tdsrhh]

I found a solution for this, Maybee the best but I works for my cases ...

    protected override void WriteJsonProperty(string name, object value, ref string precedingDelimiter, TextWriter output)
    {
        // to support flattened type ...
        if (value is ScalarValue && (value as ScalarValue).Value is string && ((value as ScalarValue).Value as string).Contains("\""))
        {
            output.Write(precedingDelimiter);
            output.Write("\"");
            output.Write(name);
            output.Write("\":");
            output.Write((value as ScalarValue).Value);
            precedingDelimiter = ",";
            return;
        }

        base.WriteJsonProperty(name, value, ref precedingDelimiter, output);
    }