Book Image

Catalyst 5.8: the Perl MVC Framework

By : Antano Solar John
Book Image

Catalyst 5.8: the Perl MVC Framework

By: Antano Solar John

Overview of this book

<p>Many web applications are implemented in a way that makes developing them difficult and repetitive. Catalyst is an open source Perl-based Model-View-Controller framework that aims to solve this problem by reorganizing your web application to design and implement it in a natural, maintainable, and testable manner, making web development fun, fast, and rewarding.<br /><br />This book teaches you how to use Catalyst to weave the various components involved in a web application, using methods and tools you personally prefer along with recommendations and details on the most popularly used objects like the DBIX ORM, TT2 Template, and Moose.<br /><br />This book will take you from how the MVC pattern simplifies creating quality applications to how Catalyst allows you to tap this power instantly. It explains advanced design patterns and concludes with the improvements that Moose brings to all this. It also incorporates valuable suggestions and feedback received from the community members and our customers. By the end of the book, you will be able to build clean, scalable, and extendable web applications. This book embodies Catalyst's philosophies of Do It Yourself and Don't Repeat Yourself.</p>
Table of Contents (16 chapters)
Catalyst 5.8
Credits
About the Author
About the Reviewer
Preface
7
Hot Web Topics
Index

Files in the lib directory


  • The heart of your application lives in the lib directory.

  • This directory contains a file called MyApp.pm. This file defines the namespace and inheritance that are necessary to make this a Catalyst application. It also contains the list of plugins to load application-specific configurations. These configurations can also be defined in the my app.conf file mentioned previously. However, if the same configuration is mentioned in both the files, then the configuration mentioned here takes precedence.

  • Inside the lib directory, there are three key directories, namely MyApp/Controller, MyApp/Model, and MyApp/View. Catalyst loads the Controllers, Models, and Views from these directories respectively.

Right now, there's one Controller called Root.pm. This will handle all root level (/) URLs. This is where the code that generates the welcome page is located.

Keep in mind that MyApp is just like any other namespace of a module. The application is created with whatever you...