The .Net core extension SeriLog filtering is not working - asp.net-core-2.0

Question

I'm using .net Core 2.0.9 and Serilog.Filters.Expressions 2.0.0.
I configured my appsettings.json to write in a log table in the Database.The data are recorded successfuly in the database but the RequestPath property is always null :
"Serilog": {
"MinimumLevel": {
"Default": "Debug",
"Override": {
"Microsoft": "Debug"
}
},
"WriteTo": [
{
"Name": "MSSqlServer",
"Args": {
"connectionString": "myconnectionString",
"tableName": "Log"
}
}
],
"WriteTo:Async": {
"Name": "Async",
"Args": {
"configure": [
{
"Name": "File",
"Args": {
"path": "..\\output\\log.txt",
"rollingInterval": "Day"
}
}
]
}
},
"Using": [ "Serilog.Settings.Configuration" ]
"Filter": [
{
"Name": "ByIncludingOnly",
"Args": {
"expression": "RequestPath like '%/api/book%'"
}
}
]
},
But i want to filter and save only log entries that have a specific api path. In this case, just entries that contain the api/user path in the RequestPath. But no data are saved anymore and i have no log errors, any idea why ?

Answer 1

Here are working steps for me, check the difference:
appsettings.json
"Serilog": {
"MinimumLevel": "Information",
"Override": {
"Microsoft": "Critical"
},
"WriteTo": [
{
"Name": "MSSqlServer",
"Args": {
"connectionString": "Data Source=xx",
"autoCreateSqlTable ": true,
"tableName": "Logs",
"autoCreateSqlTable": true,
"columnOptionsSection": {
"removeStandardColumns": [ "Properties" ],
"customColumns": [
{
"ColumnName": "Release",
"DataType": "varchar",
"DataLength": 32
},
{
"ColumnName": "RequestPath",
"DataType": "varchar"
},
{
"ColumnName": "ConnectionId",
"DataType": "varchar"
}
]
}
}
},
{
"Name": "RollingFile",
"Args": {
"pathFormat": "Logs/app-{Date}.txt",
"outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] {Message} {UserName} {ActionName} {NewLine} {Exception}"
}
}
],
"Using": [ "Serilog.Settings.Configuration" ],
"Filter": [
{
"Name": "ByIncludingOnly",
"Args": {
"expression": "RequestPath like '%/api%'"
}
}
]
},
Startup.cs
Log.Logger = new LoggerConfiguration()
.ReadFrom.ConfigurationSection(Configuration.GetSection("Serilog"))
.CreateLogger();
For checking serilog error, adding code below:
Log.Logger = new LoggerConfiguration()
.ReadFrom.ConfigurationSection(Configuration.GetSection("Serilog"))
.CreateLogger();
Serilog.Debugging.SelfLog.Enable(msg =>
{
Debug.Print(msg);
Debugger.Break();
});