Book Image

Visualforce Development Cookbook - Second Edition

By : Keir Bowden
Book Image

Visualforce Development Cookbook - Second Edition

By: Keir Bowden

Overview of this book

Visualforce is a framework that allows developers to build sophisticated, custom user interfaces that can be hosted natively on the Force.com platform. The Visualforce framework includes a tag-based markup language, similar to HTML that is used to write the Visualforce pages and a set of controllers that are used to write business logic to the Visualforce pages. Visualforce Development Cookbook provides solutions to a variety of challenges faced by Salesforce developers and demonstrates how easy it is to build rich, interactive pages using Visualforce. Whether you are looking to make a minor addition to the standard page functionality or override it completely, this book will provide you with the help you require throughout. You will start by learning about the simple utilities and will build up to more advanced techniques for data visualization and to reuse functionality. You will learn how to perform various tasks such as creating multiple records from a single page, visualizing data as charts, using JavaScript to enhance client-side functionality, building a public website, and making data available to a mobile device. With an interesting chapter on tackling common issues faced while developing Visualforce pages, the book provides lots of practical examples to enhance and extend your Salesforce user interface.
Table of Contents (16 chapters)
Visualforce Development Cookbook - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Debugging Visualforce


When developing all but the most straightforward Visualforce pages, it is highly likely that bugs will be encountered in the business logic, either the Apex controller code or JavaScript executing in the page. In order to identify where in the logic the problem lies, the bug must be reproduced with a mechanism to surface information about the internal state of the page.

The Apex debug log contains a wealth of information about a request to the server, including method entry/exit, database interaction (SOQL and DML), and errors.

Note

As the Apex debug log has a maximum size of 2 MB, and a Salesforce org is limited to 50 MB of debug logs, a common approach for developers new to the Salesforce platform is to attempt to capture debug information in custom objects. However, custom object instances are only written to the Salesforce database when a transaction successfully completes, which means that when an error occurs and the transaction is rolled back, no information about...