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

Scripting reference qualifiers


Chapter 1, ServiceNow Foundations, looked at reference qualifiers. Reference qualifiers filter the choices available in a referenced field. The three options (simple, dynamic, and advanced) all work in the same way under the hood. They provide an encoded query, which is used by the platform to find the records that can be selected. Scripted reference qualifiers use JavaScript to accomplish this in a Script Include, in two broad ways:

  • They dynamically create an encoded query. For example, you may wish to filter out inactive guests if the currently logged-in user is not a system administrator.

  • They dynamically create a list of multiple sys_id values, which is used as an encoded query. The function typically uses a more complicated method to obtain a valid list of records, and passes the list to the reference field. Users then pick an entry from this list.

Showing only guests with reservations

Let's improve the reference qualifier on the Guest field in the Check-in...