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Gain insights into AdonisJs fundamentals. Delve into routes, controllers, middleware, and hooks. Discover practical examples, illustrations, and quizzes to confidently build your full-stack applications.

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logger

This course is a detailed guide to AdonisJs. AdonisJs, inspired by Laravel, is a Node.js framework that allows developers to build full-stack web applications and micro-API servers. 

In this course, you will cover the fundamentals: routes, controllers, middleware, hooks, and more. Each chapter contains code examples and illustrations to enhance your learning, and you will also be able to quiz yourself on the materials covered. 

By the time you are done with the course, you'll have plenty of hands-on practice, and will be able to confidently write your full-stack applications in AdonisJs.

Building Full-Stack Web Applications with AdonisJs

When we build an application, we may need to log something for debugging or recording purposes. Adonis has a built-in logger based on the popular Winston package. The logger comes with two drivers: console and file. These drivers can be configured inside **config/app.js**.

# Logging levels and methods

The logger uses [RFC 5424](https://tools.ietf.org/html/rfc5424#page-11) log levels and methods for each level:

| **Level**   | **Method**  |   
|----------|-----------|
| 0   | `Logger.emerg(msg, ...data)`     |
| 1   | `Logger.alert(msg, ...data)`     |
| 2   | `Logger.crit(msg, ...data)`    |
| 3   | `Logger.error(msg, ...data)`     |
| 4   | `Logger.warning(msg, ...data)`     |
| 5   | `Logger.notice(msg, ...data)`     |
| 6   | `Logger.info(msg, ...data)`    |
| 7   | `Logger.debug(msg, ...data)`    |

# Using the Logger

In the following code snippet, we use the logger to display the user's IP address and some data on the console:

Introduction

Routing and Middleware

Controllers and Views

Request and Response

Session, Validator, and Logger

Database

Hooks, Mail, and Events

Tests

Conclusion

Appendix

Logger

Logging levels and methods