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JWT expression editor

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changes.mady.by.user Iheb Kharab

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This type of read-only custom field has a value which is dynamically calculated from a custom math/numeric expression.

It can be used to obtain a numeric value depending on the value of other fields in the current issue or in any other issues (linked issues, sub-tasks, epics, stories, JQL selected issues, etc).

Configuration

Math expression

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This parameter contains a valid math expression that will be calculated each time the value of the field is required.

Example 1 : Calculated Number Field "Number of Blocking Issues"

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Configuring a calculated number field is straightforward. You have to configure a valid parser expression, which will "calculate" the output, and optionally a custom display format

In this step by step example we show how to create a calculated number field called "Number of Blocking Issues" that will return the number of unresolved issues, the current issue is linked to "is blocked by" issue link type

.

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Create a new Calculated Date-Time Field Number Field (by JWT) custom field and name it properly.

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Providing a descriptions description will help you to identify what the custom field does but this step is optional.

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Parser

Math/Numeric expression

Add the following expression:

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titleMath expression for Calculated number field:
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count(filterByResolution(linkedIssues("is blocked by"), ""))
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To achieve this, the following functions are used:

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Finally, the configuration of the new custom field should look like this:

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Example 2: Calculated Number Field "Time to Due Date"

In this example we configure a calculated number field that will show the remaining time for Due Date.

a valid parser expression which will "calculate" the output.

Usually field codes will be used for this purpose.

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Create a new Calculated Date-Time Field custom field and name it properly.

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Providing a descriptions will help you to identify what the custom field does but this step is optional

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Parser expression

Add the following expression:

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titleMath expression for Calculated number field:Expression
linenumberstrue
%{00012issue.links.count} !=#This nullexample ? max({00012} - {00057}, 0) : null simply returns the number of linked issues.

{00012}  is code for Due date, and {00057} is code for Current date and time.

To achieve this, the following functions are used:

  • Conditional operator ?:
  • max() is used to avoid returning a negative duration when the Due date has passed.
We also check parameter "Uninitialized when calculated value is zero", since we don't want the field to be shown once Due Date has been reached.

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The result of the calculation must be a valid number. 

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Display format

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Choose Duration for Content type

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Choose Short for Duration display format

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We select duration as display format, since the numeric value being calculated, a number of milliseconds, represents a time duration. This way the value is represented like Time to Due Date: 2d 9h 43m instead of a single number.

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Finally, the configuration of the new custom field should look like this:

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Example 3: Field to show time since issue creation resolution

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Optionally choose a custom display format format. This is extremely useful to enhance usability for end users.

Read more about the available Display formats.


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In this example we configure a calculated number field for showing the time elapsed since issue creation to issue resolution. For issues which are still not resolved, the field will be uninitialized, thus it won't be shown in the view screen, following the previous steps in the first example, except at step 4 use the following math-time expression:

 , where {00112} is code for Date and time of resolution, and {00009} is code for Date and time of creation.

To achieve this the following functions are used:

  • Conditional operator ?:

We select "Duration with short format" as display mode. This way, the string value of the field will be something easily readable, like 1d 11h 30m, but the numerical value will be the duration expressed in milliseconds.

Other display options are available:

  • Duration with long format: we get something like, 1 day, 11 hours, 30 minutes.
  • Use time tracking settings: we get duration displayed using the number of working hours per day, and the number of working days per week as configured in time tracking, instead of 24 hours per day and 7 days per week.

Finally, the configuration of the new custom field should look like this:

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UI Steps UI Step

Create a new Calculated Date-Time Field custom field and name it properly.

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typetip

Providing a descriptions will help you to identify what the custom field does but this step is optional

UI Step

Parser expression

Add the following parser expression:

Code Block
languagebash
titleMath expression for Calculated number field:
linenumberstrue
{00112} != null ? {00112} - {00009} : null
Expand UI Text Box Excerpt IncludeDECADIS:Contact supportDECADIS:Contact supportnopaneltrue