EDUCBA

EDUCBA

MENUMENU
  • Blog
  • Free Courses
  • All Courses
  • All in One Bundle
  • Login
Home Software Development Software Development Tutorials Software Development Basics Rails Logger

Rails Logger

Updated February 21, 2023

Rails Logger

Introduction to Rails Logger

Rails login is one of the best practices. Rails logger helps to maintain logs in a running application. It also has some additional advantages. The log messages will be auto-formatted with related information; we can specify similar logs by tagging them and specifying similar log levels. Rails logger will put the user in a proper application login path. Also, any relevant information can be accessed quickly. Logging will help us during the debugging process when a problem is reported. The advantage of using a logger is it adds value to the application by giving insights into statistics, usage, and metrices.

Start Your Free Software Development Course

Web development, programming languages, Software testing & others

What is a Rails logger?

In Ruby rails, ActiveSupport::Logger will be created for getting standard output as a part of initialization. As we know, the log maintains the history of data usage. Here also, in ruby rails, the log is maintained when we work on an application, which helps us when an error has arisen. Log files will usually be generated with the default file name present in the environment. For instance, if we save the development file, the log file name will be development.log, and if we save the production file, production.log will be the file name. The logger in life makes the user very cozy. They have their advantages. It makes life easy!

Let us see about application logging. Information will be recorded in the application logging process, such as application run time behavior. Why do you think the log data is important? Usually, when we work on something like writing a code and we leave the site and work on something else, what will happen if something goes wrong in the previously worked code? We will end up with only log data. This data will help us in diagnosing problems. The information we can gather from logs is the number of pages loaded daily, the features considered more often and often ignored, the time in hours and second where we stayed on the page, and the data of the incoming users.

How to use Rails Logger?

We have several options to consider when we start with the Rails logger. First of all, we need to configure the logger properties. In the environment file, type the following to get started with.

Rails Logger output 1

Then we will get the output in the following format.

Rails Logger output 2

Here, all the default logs will be stored. But we can customize the log data according to the client’s requirement by using different logger levels. Because sometimes, we don’t want to log all the data for all the environments. We may need to configure certain data from a particular environment file. For instance, we need some log data for the environment and others for production. Therefore, it is better to log data at different levels.

Rails Logger output 3

The above is the code to set the logging levels, and it automatically debugs into the testing and development. This is the basic step, and then we can improve by adding the date and time format for the incoming logging messages. This is in continuation with the previously seen code only.

Rails Logger output 4

Here we have changed the date and time format in the “year-month-hours-minutes-seconds” format, and the output will be as shown below.

Rails Logger output 5

So, in this section, we saw how to initiate the logger and modify the default code as per client requirements. The next section will see how to create the Rails logger application.

Create Rails logger application

To create a rails logger application, we need to execute the code shown below:

output 6

After several outputs of the screen, you will get the Loggers application. After that, we’ll let Rails generate a model and a controller for us so that we can log anything useful. Run this by going to the logging app directory.

output 7

Rails construct the framework for a user record that includes a name and an email address. Finally, use Rails to convert the app to SQLite.

output 8

And we’ve applied! So let’s run it and make sure everything is in order.

 output 9

Configuring files

ActiveSupport::Logger, like other loggers, provides many levels. There are five levels: debug, info, warn, error, and fatal. By invoking the associated method, we may log a message at any of these levels:

output 10

The above code helps us in categorizing the messages at various levels. It is also possible to filter messages as well. In Rails, we have an option to make the configuration based on the lineage. To do so, we have to add the logging configuration as shown here: config/application.rb or config/environment/{environment_name}.rb. In this case, the environment file will take the superiority. We may alter the name and location of log files by passing Rail; a logger object configured to our liking. This also means that if we wish to modify the logging behavior, we may construct new subclasses of Logger.

output 11

Rails configuration has a means for providing a log message formatter instance to Rails. The first step is to develop that message formatter class. Improvement is made on ActiveSupport:: Logger::SimpleFormatter, where it is a call method and is overloaded. For the setup, we need a SimpleFormatter object. Logger sends four parameters to the call. They are the log level (as severity), the message’s time, the program name, and the message itself. The severity was structured as a fixed-width field, while the time was formatted as a human-readable string. Then we assembled the pieces into a recognizable message structure. This class may be added to our code in a variety of ways. The usage of the libs directory in Rails can be contentious, but we’ll use it for the sake of acquiring a formatter.

Conclusion

This blog explored the Rails logger and how to use it from our application code. Then, we saw how to make changes in the log messages to get more information per client requirements, and we looked at how to alter and extend the setup. There’s a lot more you can do with logging. You have also learned about creating configured files. Ultimately, it is important that logging each time is very important when we are stuck with errors. It helps us to debug.

Recommended Articles

This is a guide to Rails Logger. Here we discuss the Rails logger, how to use it from our application code, and how to make changes in the log messages. You may also look at the following articles to learn more –

  1. A career in Ruby on Rails
  2. Rails Commands
  3. Advantages of Rails
  4. Ruby On Rails Language
All in One Excel VBA Bundle
500+ Hours of HD Videos
15 Learning Paths
120+ Courses
Verifiable Certificate of Completion
Lifetime Access
Financial Analyst Masters Training Program
2000+ Hours of HD Videos
43 Learning Paths
550+ Courses
Verifiable Certificate of Completion
Lifetime Access
All in One Data Science Bundle
2000+ Hour of HD Videos
80 Learning Paths
400+ Courses
Verifiable Certificate of Completion
Lifetime Access
All in One Software Development Bundle
5000+ Hours of HD Videos
149 Learning Paths
1050+ Courses
Verifiable Certificate of Completion
Lifetime Access
Primary Sidebar
All in One Software Development Bundle5000+ Hours of HD Videos | 149 Learning Paths | 1050+ Courses | Verifiable Certificate of Completion | Lifetime Access
Financial Analyst Masters Training Program2000+ Hours of HD Videos | 43 Learning Paths | 550+ Courses | Verifiable Certificate of Completion | Lifetime Access
Footer
About Us
  • Blog
  • Who is EDUCBA?
  • Sign Up
  • Live Classes
  • Certificate from Top Institutions
  • Contact Us
  • Verifiable Certificate
  • Reviews
  • Terms and Conditions
  • Privacy Policy
  •  
Apps
  • iPhone & iPad
  • Android
Resources
  • Free Courses
  • Java Tutorials
  • Python Tutorials
  • All Tutorials
Certification Courses
  • All Courses
  • Software Development Course - All in One Bundle
  • Become a Python Developer
  • Java Course
  • Become a Selenium Automation Tester
  • Become an IoT Developer
  • ASP.NET Course
  • VB.NET Course
  • PHP Course

ISO 10004:2018 & ISO 9001:2015 Certified

© 2023 - EDUCBA. ALL RIGHTS RESERVED. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.

Let’s Get Started

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you

EDUCBA
Free Software Development Course

Web development, programming languages, Software testing & others

By continuing above step, you agree to our Terms of Use and Privacy Policy.
*Please provide your correct email id. Login details for this Free course will be emailed to you

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you
EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you
EDUCBA Login

Forgot Password?

By signing up, you agree to our Terms of Use and Privacy Policy.

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy

Loading . . .
Quiz
Question:

Answer:

Quiz Result
Total QuestionsCorrect AnswersWrong AnswersPercentage

Explore 1000+ varieties of Mock tests View more