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Mastering ServiceNow Scripting

You're reading from   Mastering ServiceNow Scripting Leverage JavaScript APIs to perform client-side and server-side scripting on ServiceNow instances

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781788627092
Length 226 pages
Edition 1st Edition
Languages
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Author (1):
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 Kindred Kindred
Author Profile Icon Kindred
Kindred
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Toc

Table of Contents (18) Chapters Close

Title Page
Packt Upsell
Contributors
Preface
1. Getting Started FREE CHAPTER 2. Exploring the ServiceNow Glide Class 3. Introduction to Client-Side Scripting 4. Advanced Client-Side Scripting 5. Introduction to Server-Side Scripting 6. Advanced Server-Side Scripting 7. Introduction to Custom Pages 8. Scripting with Jelly 9. Debugging the Script 10. Best Practices 11. Deployments with the Update Sets 12. Building a Custom Application Using ServiceNow Scripting 1. Other Books You May Enjoy Index

Script examples


Now that we have seen how the basics of server-side scripting work, we can take a look at some scripting examples to further our knowledge of how to use these introductory server-side techniques.

We'll start with a further business rule example.

This time, we will create a before delete business rule to ensure that directors are not deleted. We need to set the business rule to advanced; select the delete checkbox and before in the When field. Let's have a look at the code:

(function executeRule(current, previous /*null when async*/) {

  if (current.title == 'Director') {
    gs.addErrorMessage('Cannot delete Director');
    current.setAbortAction(true);
    action.setRedirectURL(current);
  }

})(current, previous);

Here, we are checking whether the user is a director using the title field, and if so, using setAbortAction to stop the delete going ahead. To ensure the user is kept informed, we are also using addErrorMessage to display a message to the user and action.setRedirectURL...

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