OCL expression editor

To make it easier to enter Ocl expressions in Vertec, there is the OCL expression Editor, which allows you to search and compose the desired expression from the Vertec data model.

In the area below the expression, the Expression Editor displays whether the expression is valid or not.

In a list of projects, the total of the open services of the project leader should be shown for each project. The Expression Editor is opened via the List Settings settings.

Type projektleiter under Expression (1). The editor reports that the expression is OK (2) and that the current type is now user. In the right part, the fields of the user appear, including open services. Select this in the list by double-clicking (3) or type it manually.

When editing OCL Expressions, a description (in English only) of the field is shown below the available fields (4). This description is also shown as a tooltip (5) when manually typed. The code completion appears in the selected language.

The editor now reports that the current type is a list of open services, and shows the fields of type OpenService on the right.

Now select the value text field from the list or type in .wertext after the existing expression so that the expression reads: projektleiter.offeneleistungen.wertext. Editor now shows the following:

The current type is now a list of numeric values (currency), and in the right part only yellow entries (operations) are visible. Select ->sum to sum the numbers.

The current type is now a single numeric value, namely the sum of all open services of the project leader. If you click on OK, the created expression will be transferred and shown in the corresponding list cell.