Access Polarion Services - Nextedy Documentation

Prerequisites

A data model with at least one server-rendered property (see Create a Computed Property)
Familiarity with Velocity template syntax

Available Platform Services

Powersheet automatically injects the following Polarion services into every server-rendered template evaluation context:

Variable	Service	Purpose
`$trackerService`	ITrackerService	Query work items, access project tracker metadata
`$txService`	ITransactionService	Transaction management and context
`$repositoryService`	IRepositoryService	Project metadata, users, roles, configuration
`$securityService`	ISecurityService	Permission checks, user authentication, role-based access

Use $trackerService to Query Work Items

The $trackerService provides access to Polarion’s tracker for querying work items and project data:

properties:
  parentProject:
    serverRender: "$trackerService.getProjectById($item.projectId).getName()"
    readable: true
    updatable: false

Each call to $trackerService methods executes against the Polarion database. Avoid expensive queries like getDataService().searchInstances() in templates that render for every row in a large sheet.

Use $repositoryService for Repository Metadata

The $repositoryService provides access to project-level metadata, users, and roles:

properties:
  authorName:
    serverRender: "#if($item.author)$repositoryService.getUser($item.author).getName()#else Unknown#end"
    readable: true
    updatable: false

The service context is cached across all template evaluations within a single query. Methods that return static data (project names, user names) are efficient to call repeatedly.

Use $securityService for Permission Checks

The $securityService enables role-based visibility and permission-aware computed values:

properties:
  accessLevel:
    serverRender: "#if($securityService.canReadInstance($wi))Full Access#else Restricted#end"
    readable: true
    updatable: false

Use cases for $securityService:

Show or hide sensitive data based on user role
Display different labels depending on write permissions
Create audit-friendly computed fields showing access status

Use $tx for Transaction Context

The $tx variable provides access to the current transaction, useful for read-only operations that need transactional consistency:

properties:
  txInfo:
    serverRender: "#if($tx)In transaction#else No transaction#end"
    readable: true
    updatable: false

The exact methods available on each service depend on your Polarion version and API. Consult your Polarion SDK documentation for the complete method reference of ITrackerService, IRepositoryService, ISecurityService, and ITransactionService.

Combine Multiple Services

For complex computed properties, combine several services in a single template:

properties:
  auditField:
    serverRender: "#set($user = $repositoryService.getUser($item.author))#set($project = $trackerService.getProjectById($item.projectId))$user.getName() @ $project.getName()"
    readable: true
    updatable: false

Handle Service Errors

If a service call fails, the template engine returns #SERVER_RENDER_ERROR. Protect against common failures:

properties:
  safeProject:
    serverRender: "#set($proj = $trackerService.getProjectById($item.projectId))#if($proj)$proj.getName()#else Unknown Project#end"
    readable: true
    updatable: false

If you see #SERVER_RENDER_ERROR in the sheet, the Velocity template failed. Check the Polarion server logs for the specific exception — common causes include null pointer access, invalid method calls, or missing resources.

Verify

After adding service-based computed properties:

Open the powersheet document in Polarion
You should now see computed values populated from platform services
Test with different user accounts to verify permission-aware fields display correctly
If any cells show #SERVER_RENDER_ERROR, consult the Debug Template Errors guide

​Prerequisites

​Available Platform Services

​Verify

​See Also

Prerequisites

Available Platform Services

Verify

See Also