Validators

Validators check that any input available to the transition (such as user-supplied input) is valid before the transition is performed. If a transition's validator 'fails', the transition's post functions will not be executed and the issue will not progress to the destination step of the transition.

You can use Power Scripts for Jira and SIL to define a large set of validators beside the default validators offered by Jira, by just adding a (k) SIL Validator to a transition and publishing the workflow, as described here.

Below are just a few common examples:

Comment required

A validator that forces users to enter a comment during a transition, otherwise displaying a customized error message:

string errorMsg = "You must enter a comment!";
if(!hasInput("comment")) {
   return false, "comment", errorMsg;
}

Field has single value

A SIL validator for checking if a multi-valued field does not contain more than one value during a transition:

string errorMsg = "You must choose a single fix version!";
if(size(fixVersions) > 1) {
   return false, "fixVersions", errorMsg;
}

Parent status

A SIL validator which ensures that the current issue's parent issue is in one of the specified Statuses:

string[] statuses = {"Opened", "Reopened"};
string errorMsg = "Parent issue should have status Opened or Reopened!";
if(!isNull(parent) && !elementExists(statuses, parent.status)) {
   return false, errorMsg;
}

Validation based on regular expression

A SIL validator which checks if a text field matches a regular expression (eg for a social number):

string errorMsg = "Invalid social number format.";
string REGEXP = "^\\d{3}-\\d{2}-\\d{4}$"; 
if(!matches(customfield_10100, REGEXP)) {
   return false, "customfield_10100", errorMsg;
}

Force a custom field to be required if another field was set to a certain value

A SIL validator which makes custom field Product with id customfield_10200 required in the resolve screen only if the resolution was set to Fixed:

string errorMsg = "To resolve the issue as 'Fixed' you should give a value to field 'Product'.";
if(resolution == "Fixed" && !hasInput("customfield_10200")) {
   return false, "customfield_10200", errorMsg;
}

In a similar way, you can make any custom field required based on another custom field value:

string errorMsg = "The Address field is required.";
if(customfield_10100 == "Yes" && !hasInput("customfield_10200")) {
   return false, "customfield_10200", errorMsg;
}

In the above example we assume that the field with id customfield_10100 is a select list with options Yes and No, and when Yes option is selected, field Address with id customfield_10200 should be required.

Ensure that the issue has at least one attachment

A SIL validator which checks if an issue has any file attached during a transaction:

string errorMsg = "At least one file must be attached to the issue.";
if(size(attachments) == 0) {
   return false, errorMsg;
}

Validation on linked issues

Blocking Start Progress transition whenever current issue has a link of type Blocks with an issue in a status different from Resolved and Closed:

string errorMsg = "Progress can't start because there is at least one blocking issue.";
string[] statuses = {"Resolved", "Closed"};
string[] blockingIssues = linkedIssues(key, "Blocks");
for(string issue in blockingIssues) {
    if(!elementExists(statuses, %issue%.status)) {
       return false, errorMsg;
    }
}

Forbidding issue links of types Blocks and Cloners with issues of type Bug:

string errorMsg = "Issue links of types 'Blocks' and 'Cloners' with 'Bugs' are forbidden.";
string[] links = {"Blocks", "Cloners"};
for(string link in links) {
    string[] linkedIssues = linkedIssues(key, link);
    for(string issue in linkedIssues) {
        if(%issue%.issueType == "Bug") {
           return false, errorMsg;
        }
    }
}

Validation on non-linked issue

Preventing a transition from being executed if the rest of issues in the project aren't closed:

string errorMsg = "There are still unclosed issues in the current project.";
string[] issues = selectIssues("project = " + project + " AND status != Closed AND key != " + key);
if(size(issues) > 0) {
   return false, errorMsg;
}

Validation based on mathematical expression

A SIL validator which checks if a numeric custom field is greater than or equal to 0:

string errorMsg = "The number should be greater or equal to 0";
if(sign(customfield_10101) == -1) {
   return false, "customfield_10101", errorMsg;
}

The sign routine determines the sign of a number. It returns 1 if the number is positive, zero (0) if the number is 0, and -1 if the number is negative.

More useful mathematical routines can be found in the Math routines section.

Validation based on date-time expression

A SIL validator which checks if due date is before current date:

string errorMsg = "The due date of the issue was exceeded!";
if(dueDate < currentDate()) {
   return false, "duedate", errorMsg;
}

More useful date routines can be found in the Date Routines section.

Compare two parsed texts

A SIL validator which checks if description contains summary:

string errorMsg = "Description must contain summary";
if(!contains(description, summary)) {
   return false, "description", errorMsg;
}

Users in a field are/aren't in a project role

A SIL validator which checks if users selected in a multi user picker custom field are in a given project role:

string PROJECT_ROLE = "Developers";
for(string user in customfield_10500) {
    if(!isUserInRole(user, project, PROJECT_ROLE)) {
       string errorMsg = "User " + user + " is not in project role " + PROJECT_ROLE;
       return false, "customfield_10500", errorMsg;
    }
}

A custom field is/isn't initialized

A SIL validator which checks if a custom field is initialized during transaction:

string errorMsg = "Field was not initialized!"; 
if(!hasInput("customfield_10500")) { 
   return false, "customfield_10500", errorMsg; 
}

Check user property

A SIL validator which checks if a user property has a certain value:

string COUNTRY = "Romania";
string errorMsg = "Assignee country must be " + COUNTRY; 
if(getUserProperty(assignee, "country") != COUNTRY) { 
   return false, "assignee", errorMsg; 
}