Single-line Exception Formatting

[evrimsahin]

I'm trying to format exception details in a single line using ExpressionTemplate, but it's not working as expected.

Template I'm using:

"template": "{@t:yyyy-MM-dd HH:mm:ss.fff zzz}|{@l:u3}|{SourceContext}|{EventId}|{Replace(@m, '\n', ' ')}{#if @x} | Exception: {Replace(@x, '\n', ' ')}{#end}\n"

Actual result:

2025-08-04 10:28:33.244 +03:00|ERR|Microsoft.EntityFrameworkCore.Query|{"Id":10100,"Name":"Microsoft.EntityFrameworkCore.Query.QueryIterationFailed"}|An exception occurred while iterating over the results of a query for context type ''.
System.InvalidOperationException: An exception has been raised that is likely due to a transient failure.
---> Npgsql.NpgsqlException (0x80004005): Failed to connect to [::1]:5432
---> System.Net.Sockets.SocketException (10061): No connection could be made because the target machine actively refused it.
at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
...

Question:
Is there a way to ensure exception details are formatted in a single line with ExpressionTemplate? The Replace(@x, '\n', ' ') doesn't seem to affect the exception formatting.

[nblumhardt]

If you're on Windows it's likely you'll need to replace \r too, since line endings are CRLF on that platform.

Plugging in a custom function (instructions in the README) like RemoveNewlines(..) is another route you could take, and probably the nicest to work with. HTH!