Custom Functions | Online Help | Zoho Projects

Custom Functions

Automate your issues workflow using Custom Functions.

What is a Custom Function?

A custom function is a piece of code that can be used for automating a process. You can write your own function in Deluge and call it from one or more business rules. It is similar to the built-in functions in Javascript like DATE, CONCAT, REPLACE, etc. In Zoho Projects, you can update the issue fields automatically using business rules. With the help of custom functions, you can automate a notification, call a webhook, or perform logic right after a business rule is triggered.

Feature Availability: Enterprise plan only


  • When an issue is escalated, user can be notified via an SMS, an email or a Zoho Chat using custom functions.
  • When an issue's severity is updated, a relevant comment can be added to the issue via a custom function.
  • Integration can be done with Zoho Apps and third party apps using a custom function.

Add a Custom Function

  1. Click in the top navigation bar.
  2. Navigate to Issue Tracker and click Custom Functions.
  3. Click New Custom Function.
  4. Enter a Function Name and a Description.
  5. Set the Arguments.
  6. Type in your code in the Deluge script editor or drag and drop the parameters available in the left panel of the editor and customize them.
  7. Click Save.

Helen wants to notify a set of users in her project about the change of issue owner for a specific issue upon escalation. She might have to send the notification very often to the same set of users on this subject in the future as well. So, Helen decides to create a custom function and get it called through one of the business rules. This is how her custom function will look.

 Associate a Custom Function With a Business Rule

  1. Click  in the top navigation bar.
  2. Navigate to Issue Tracker and click Business Rules.
  3. Select a rule and navigate Actions tab.
  4. In Actions, click Call Custom Function.
  5. Click the plus icon  to create a new custom function or click the chain icon  to call an existing function from the business rule.
  6. Click Save Rule.

Learn More about configuring business rules.

Execute a Custom Function

  1. Click  in the top navigation bar.
  2. Navigate to Issue Tracker > Custom Functions.
  3. Click the function that you would like to execute. Here, Helen tries to execute the function "Send_Mail".
  4. Click Save and Execute at the bottom.
  5. Enter the Issue ID (i.e, the argument).
  6. Click Execute.

 Test Custom Function Integration

  1. Add test data in Zoho Projects that match your business rule criteria.
  2. Check for updates received from Zoho Projects in your application via a notification triggered through your custom function.
  3. If there is an error, modify your custom function in Zoho Projects and retest.
  4. Continue testing until you get the correct output. Here, John Marsh, Victor Young, and Lin Brenn receive a notification from Helen on the change in issue ownership.
You can add upto 10 arguments.

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