在 Serilog 中，如何在使用 {Properties} 格式说明符时从 JSON 格式的日志消息中删除空括号？

Question

我有以下outputTemplate字符串：

var formatString = "{NewLine}[{Timestamp:dd-MMM-yyyy HH:mm:ss}] {Level} {SourceContext}{NewLine}{Properties:j}{NewLine}{Message:lj}{NewLine}{Exception}";

我有几个丰富的配置来添加和删除属性。在没有要记录的属性的情况下，我一直在一行中获取空的 JSON 括号。例如，当有要记录的属性时，我会收到如下日志消息：

[05-Jul-2019 07:13:57] Information Microsoft.AspNetCore.Mvc
{ "UserName": "SomeUser" }
This is some log message with a property that was not removed by any of the enrichers.

但是，在没有属性的情况下，我会得到这个

[05-Jul-2019 07:13:57] Information Microsoft.AspNetCore.Mvc
{}
This is some log message that contains no properties

空的 JSON 括号{}散落在我的日志中，只是增加了噪音。如何扩展或覆盖 Serilog 以摆脱这些括号？

Answer 1

感谢@Kraego，我终于弄清楚了这一点。以下是使用 NuGet 包设置记录器的方法Serilog.Expressions：

var logger = new LoggerConfiguration()
            .WriteTo.Console(
                new ExpressionTemplate(
                    "{@t:yyyy-MM-dd HH:mm:ss.fff} [{@l}] {#if SourceContext is not null} ({SourceContext}){#end}\n{@m}{#if @x is not null}\n{@p}{#end}\n{@x}\n",
                    theme: TemplateTheme.Literate))
            .CreateLogger();

就我而言，我只想@p在异常情况下打印属性 ( )，否则我只想要呈现的消息。使用示例：

logger.LogDebug("Sending {Count} records to Kafka broker for asset {AssetId}, session: {SessionId}", 1000, 1234, 5678);

logger.LogWarning(exception, "An Exception was thrown during the processing of Data Source: {DataSource}. Retry attempt {Retry}/{MaxRetries}", "MyFileName.gz", 1, 3);

及其相应的输出：

2023-04-13 05:34:38.543 [Debug]  [MyNamespace.Pipeline.Kafka.KafkaMessagePublisher]
Sending 1000 records to Kafka broker for asset 1234, session: 5678


2023-04-13 05:34:39.666 [Warning]  [MyNamespace.Importer.Core.Processors.ProcessorPipeline]
An Exception was thrown during the processing of Data Source: MyFileName.gz. Retry attempt 1/3
<CUSTOM EXCEPTION PROPERTIES>
<STACK TRACE>