Serilog: Want the text log to split folders by month！！

[amwitx]

Hi I have a need，

Output file mode want to add dynamic folder。
For example, by month

d:/logs/project-a/2020-01/log20200101.txt
d:/logs/project-a/2020-02/log20200201.txt
d:/logs/project-a/2020-03/log20200301.txt

Can the implementation callback?
such as

.WriteTo.File(() => $"{DateTime.Now.ToString("yyyy-MM")}/Debug-.txt", rollingInterval: RollingInterval.Day)

Because we have our own plan to clean up the logs, we want to split the folders by month

thanks!!!

[nblumhardt]

Hi! Try installing _Serilog.Sinks.Map_ and using:

.WriteTo.Map(
  le => new DateTime(le.Timestamp,Year, le.Timestamp.Month, le.Timestamp.Day),
  (month, wt) => wt.File($"{month:yyyy-MM}/log-.txt", rollingInterval: RollingInterval.Day),
  sinkMapCountLimit: 1)

[amwitx]

OK can be used.

Can I get the log level in the map? In this way, only one configuration is needed. Otherwise, it needs to be written many times

such as

.WriteTo.Map(
le => new DateTime(le.Timestamp.Year, le.Timestamp.Month, le.Timestamp.Day),
(month, log) => log.Async(a => a.File(new CompactJsonFormatter(),
Path.Combine(pathPrefix, $"{month:yyyy-MM}/{le.Level？}-.txt"),
rollingInterval: RollingInterval.Day)),
sinkMapCountLimit: 1)

How to get {log. Level}? I want to split files by level

Write it now many times, The only difference is the level part:

.WriteTo.Map(
le => new DateTime(le.Timestamp.Year, le.Timestamp.Month, le.Timestamp.Day),
(month, log) => log.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Debug)
.WriteTo.Async(a => a.File(new CompactJsonFormatter(),
Path.Combine(pathPrefix, $"{month:yyyy-MM}/Debug-.txt"),
rollingInterval: RollingInterval.Day))),
sinkMapCountLimit: 1)

.WriteTo.Map(
le => new DateTime(le.Timestamp.Year, le.Timestamp.Month, le.Timestamp.Day),
(month, log) => log.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Information)
.WriteTo.Async(a => a.File(new CompactJsonFormatter(),
Path.Combine(pathPrefix, $"{month:yyyy-MM}/Information-.txt"),
rollingInterval: RollingInterval.Day))),
sinkMapCountLimit: 1)

.WriteTo.Map(
le => new DateTime(le.Timestamp.Year, le.Timestamp.Month, le.Timestamp.Day),
(month, log) => log.Logger(lg => lg.Filter.ByIncludingOnly(p => p.Level == LogEventLevel.Error)
.WriteTo.Async(a => a.File(new CompactJsonFormatter(),
Path.Combine(pathPrefix, $"{month:yyyy-MM}/Error-.txt"),
rollingInterval: RollingInterval.Day))),
sinkMapCountLimit: 1)

[bartelink]

le is a LogEvent, which has a level in it (but I know zero about the Map sink so can't say whether you can use it that way). The answer is in the source of the config overloads - a restrictedToMinLevel constraint might make more sense?

[amwitx]

With tuple packaging, that's fine. Thank you！！

.WriteTo.Map(
le => new Tuple(new DateTime(le.Timestamp.Year, le.Timestamp.Month, le.Timestamp.Day), le.Level),
(key, log) => log.Async(a => a.File(new CompactJsonFormatter(),
Path.Combine(pathPrefix, $"{key.Item1:yyyy-MM}/{key.Item2}-.txt"),
rollingInterval: RollingInterval.Day)),
sinkMapCountLimit: 1)