Having Problems With The Default Logger Error In Rails?
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Logging provides valuable online trading fees for alcohol consumption analysis, statistics and metrics applications and saves our staff from troubleshooting. But personally, I often rely on improper ulterior motives. So, what should we pay attention to in order to get the most out of journaling?
We’ll look at what Rails loggers are and some logging best practices.
What Is A Rails Logger?
If this is your first time seeing Ruby, many of us can rely on the puts command to sign information when debugging code locally. And this is an easy way to quickly access information. However, this is the case when put options are no longer useful at all.
When creating your resume, use aria-label=”aRails< /a> Logger or a similar tool will take you one step closer to good application logging. To manage firewood in a running application, the Rails registrar providedAdds additional functionality.
- Set hit rate
- Tag related logs
- Automatically format log messages using relevant information
Let’s take a look at the important Rails logger configuration and how to customize it for your specific needs.
Basic Configuration
When setting up our rails, we need to consider a few options. Here are some of them.
Set Logger Properties
Rails.logger = Logger.new(STDOUT)
config.logger = ActiveSupport::Logger.new("log/#Rails.env.log")
Congratulations! You have a diary. Now when you use Rails.logger.info “Look at this info!” you will see this guy in your output:
Me, [2019-01-04T05:14:33.432311 #123] INFO -- Important: Check out this guide!
Of course not, if you just want to get started. Our default recorder records everything. And this may be too much for normal application production. So let’s change that.
Logging is only one level
Once we understand that we don’t want to constantly log a lot of information, We can easily decide to define our logging class. In fact, the possibility of recording the environmental balance at different levels for different weather conditions should be considered. In Rails, we can define individual per-environment configurations in our own Environment.rb files such as development.rb or production.rb. We’ll talk more about logging between levels in the Best Practices section.
Rails.logger means Logger.new(STDOUT)
Rails.logger.level = Logger::DEBUG
Don’t worry if you don’t know what signature level to choose. Rails embrace people. The default is INFO in production and DEBUG in development as development.
Log Format
Now that logging is working properly, let’s improve readability by setting the basic logging format.
First, let’s change the date and time format in the magazine tweets to continue with our design above.
Rails.logger = Logger.new(STDOUT)
Rails.logger.level = Logger::DEBUG
Rails.logger.datetime_format: "%Y-%m-%d %H:%M: %S"
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After changing the date and time, we see logs that look something like this:
Me, [2019-01-04 #123] 05:14:33 INFORMATION -- The main thing: read this information!
With regard to the general format of the messages printed for the magazine, there are a few more changes we can make. Let’s say we don’t like the average result and we want to shake things up a bit. This can be done in two ways: first with the configuration.
As noted, we have set up a format specification to display the date and time of the log message, as well as the message and program name.
#document formatter
logger.formatter = proc do | scope, time, program name, message |
"#datetime, #severity: #msg range from #prognamen"
end
Alternatively, we can customize the format by overriding the layout writer method. In this case, the experts create their own instructor training session that does the same as in the example above.
class MyAppFormatter < Logger::Formatter
def call(severity, Energy, ProgramName, message)
"#datetime, #severity: #message at time #programNamen"
end
end
2019-01-04 05:14:33, INFO: check it out with info! home
As a last step, users can also change the format since it generates a JSON.
class MyAppFormatter < Logger::Formatter
outgoing call (severity, time, program name, message)
%Q | Time: "#datetimen", Severity: "#severityn", Message: "#msg provided by #progname"n |
end
end
This can be useful if the use of log aggregators allows this fast query. The results look like this:
"2019-01-04 "time": 05:14:33",
"severity": "INFO",
"message": "Check this info! from Main" < br>Why not just cast the configuration for this log? Why create a trainer rank? Well, ultimately, depending on your needs, you may want to inject more complex logic back into your trusty trainer. You can save the content in a different format depending on the content of the message. Or measure what is. Using classes means an easy transition to complex reasoned judgments for protocols.
With Voice Recorder
Before we move on to recommendations, we'd all like to take note. On the other hand, if we're in a Ruby controller model, we can take a moment to add"your message" in logger.info. But if you are near a utility object or just a ruby ruby object, you need to set up the logger like this:
logger = Rails.logger
logger.info 'Your message goes there,
here Rails'
//.logger.info 'whatever'For those of you who have worked with Ruby Rails or the ecosystem for a while, this might be a good and easy task. For others, it's something you might not notice on the street. And I want to reduce confusion if I can.
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