This can be done in one of two ways — first, with configuration.As shown below, we're setting the format specification to show the log message's datetime and message and the program's name. Perhaps you'll want to log information in a different format based on what's in the message. Using classes makes an easier transition to complex logic for logs.For example, we can log message strings: The two statements seem fairly similar.
In contrast, in the first example, the application concatenates the string before inspecting whether the log level applies.By default, we typically log into environment-specific log files in our Rails app.It will simplify debugging and help reduce log pollution when things are logged at too high a level.Some of you may have noticed we can log in different ways.When building an application, using a Rails logger or similar gem puts you on the path to proper application logging.
To handle logs in a running application, the Rails logger provides additional functionality.After setting the logging level, let's improve readability by setting a simple logging format.First, let's change the datetime format of the logging messages, continuing on from our configuration above.However, logging into a server in order to grep or tail a file lacks any real-world usability. With Retrace, you can consolidate and view logs easily. And, most interestingly, you can analyze trends in the logs.We need a way to mine our logs for information as well as stay on top of issues and metrics. Installing and configuring Retrace for your Rails app involves just a few steps.Before we move on to best practices, I want to make one additional note.