Book Image

Mastering ServiceNow - Second Edition

Book Image

Mastering ServiceNow - Second Edition

Overview of this book

ServiceNow is a SaaS application that provides workflow form-based applications. It is an ideal platform for creating enterprise-level applications giving requesters and fulfillers improved visibility and access to a process. ServiceNow-based applications often replace email by providing a better way to get work done. The book steps through the main aspects of the ServiceNow platform, from the ground up. It starts by exploring the core architecture of ServiceNow, including building the right data structure. To add business logic and control data, and interactivity to user interaction, you will be shown how to code on both server and the client. You will then learn more about the power of tasks, events and notifications. The book will then focus on using web services and other mechanisms to integrate ServiceNow with other systems. Furthermore, you will learn how to secure applications and data, and understand how ServiceNow performs logging and error reporting. You will then be shown how to package your applications and changes, so they can be installed elsewhere and ways to maintain them easily. If you wish to create an alternative simple interface, then explore ways to make ServiceNow beautiful using Service Portal. By the end of the book, you will know the fundamentals of the ServiceNow platform, helping you be a better ServiceNow System Administrator or developer.
Table of Contents (18 chapters)
Mastering ServiceNow Second Edition
Credits
Notice
About the Author
About the Reviewer
www.PacktPub.com
Preface

Managing fields with UI Policy


In Chapter 3, Server-Side Control, we looked at Data Policies. These force a field to meet a condition by rejecting a database operation if it is necessary. The benefit of Data Policies is that it does not matter where the data came from. This will reject invalid updates from user entry, scripts, and even through web services, if the right options are set.

UI Policies have the same function, but they only work for browsers. They do have an advantage, however, since they work before the data is submitted to the instance, giving instant feedback to the user.

As discussed earlier, faster feedback to the user is often beneficial. However, UI Policies only request the browser to perform the check. While the ServiceNow admin controls the instance, we must assume that the user controls the browser. Later in this chapter, we will learn how a knowledgeable user can easily make the browser ignore any checks that you put in place.

Manipulating the form

In addition to making...