Auto populate user picker field based on expression screen

The Approval Configuration screen displays the available properties to setup an Approval :

When selecting an user picker _All or an user picker _Any , you are able (Optionally) to specify expressions that identify

• users that will be filled on the user picker custom field in order to enable them to approve and
• users that will be removed by the user picker in order to exclude them.

just clicking on the icon showing on the right side of the select list:

Insert expressions identifying the users to insert in the user picker custom field

The Auto populate user picker field based on expression dialog requires an expression specifying expression, respecting the expected syntax, that specify the users to insert in the user picker field and optionally  (Can Approve or Reject) and, optionally,  the users to erase from the list (Excluded).

 You cannot specify the users to exclude (Excluded) without specify the users to add to the list user picker field (Can Approve or Reject).

 You are able to insert the allowed tags on the text areas simply performing a drag and drop of a tag inside the text area on the point you want add it.

 Example

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 You are able to select the values to insert inside the property tags.

 Example

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Test the expression

You are able to test an expression in order to check if the list of users returned for an issue, on evaluating the Can Approve or Reject and Excluded, matches the expectations. 

In order to test your expressions, you can specify an issue key, click on Run Test and review the list of users that are returned below.

Expected syntax 

A valid expression requires that you respect the expected syntax.

The following diagram illustrates the expected syntax for valid expressions that you can specify in the Can Approve or Reject and the Excluded text areas:

The syntax that allows to specify the property's values expects a start end tag identifying the property:

• <users>...</users>
• <groups>....</groups>
• <roles>....</roles>
• <group-pickers>...</group-pickers>
• <user-pickers>...</user-pickers>
• <component-leads>..</component-leads>.

 The admissible  property's values depends by the selected Property:

• <users>
  
  • Username, any existing username
  • Reporter, key word to include in the list the issues's reporter
  • Assignee, key word to include in the list the issues's assignee
  • ProjectLead, , key word to include in the list the concerned project lead
• <groups>
  
  • Group, any existing Jira Group
• <roles>
• <user-pickers>
• <group-pickers>
• <component-leads>

You are able to specify one or more Property's values.

Property's values are concatenated via the '&'.

 Example: <users>Tom Black & Nancy Green & Jack Red & Katy White</users>

The syntax that allows to specify a condition enabling a set of properties expect the following start end tag: 

• <conditional-rule  name="Conditional Rule Name">...</conditional-rule>

An expression can include zero, ore, more conditions enabling one or more properties.

 Example: <conditional-rule  name="Priority High"><groups>Managers</groups> </conditional-rule> <conditional-rule  name="Priority Low"><users>Tom Black</users></conditional-rule>