Well in fact I succeeded in "predefining" a user and having the possibility to change it later on. I created an aspect holding the various users in the workflow and associated that aspect to all workflow types in the model description.<types>
<type name="qcp:mtSignOff">
<parent>bpm:workflowTask</parent>
<mandatory-aspects>
<aspect>qcp:assignments</aspect>
</mandatory-aspects>
</type>
</types>
<aspects>
<aspect name="qcp:assignments">
<associations>
<association name="qcp:mtApprover">
<source>
<mandatory>false</mandatory>
<many>false</many>
</source>
<target>
<class>cm:person</class>
<mandatory>false</mandatory>
<many>false</many>
</target>
</association>
</associations>
</aspect>
</aspects>
Inside the workflow I added the following script: <start-state name="initiateCcr">
<task name="qcp:initiateCcr" swimlane="initiator">
<event type="task-create">
<action class="org.alfresco.repo.workflow.jbpm.AlfrescoJavaScript">
<script>
<variable name="qcp_mtApprover" access="write"/>
<expression>
qcp_mtApprover = people.getPerson("Francois Buijs");
</expression>
</script>
</action>
</event>
</task>
Although I added this to the <task-create> event of the start-state, the default will be visible in the next workflow step (provided the visibility is regulated in the "web-client-config-custom.xml" file as shown below:<config evaluator="node-type" condition="qcp:mtSignOff" replace="true">
<property-sheet>
<separator name="sep1" display-label="General" component-generator="HeaderSeparatorGenerator"/>
<show-property name="bpm:taskId" read-only="true"/>
<show-property name="bpm:description" component-generator="TextAreaGenerator" read-only="true"/>
<show-property name="bpm:dueDate" read-only="true"/>
<show-property name="bpm:priority" read-only="true"/>
<show-property name="bpm:status"/>
<separator name="sep2" display-label="Required metadata" component-generator="HeaderSeparatorGenerator"/>
<show-property name="qcp:wfPlannedArpRelease" display-label="Planned ARP release"/>
<separator name="sep3" display-label="Roles and assigned users" component-generator="HeaderSeparatorGenerator"/>
<show-association name="qcp:mtApprover" display-label="Assigned MT signer" read-only="true"/>
</property-sheet>
</config>
(I left out irrelevant lines to reduce to the minimum needed).During testing the workflow assigned the task to the mentioned person (Francois Buijs). And I was able to change the assigned person during the workflow with the expected effect.
)
