tests/api/test_workflow.py

@@ -201,6 +201,18 @@ def test_workflow_trigger_with_data(pub, local_user):
         params='ERROR',
     )
 
+    # post with JSON data that is not a dictionary
+    formdata = formdef.data_class()()
+    formdata.just_created()
+    formdata.store()
+    get_app(pub).post_json(
+        sign_uri(formdata.get_url() + 'jump/trigger/xx-yy'),
+        status=200,
+        headers={'content-type': 'application/json'},
+        params=['a', 'b', 'c'],
+    )
+    assert formdef.data_class().get(formdata.id).workflow_data == {'xx-yy': ['a', 'b', 'c']}
+
 
 def test_workflow_trigger_with_file_data(pub, local_user):
     workflow = Workflow(name='test')

wcs/wf/jump.py

@@ -116,6 +116,10 @@ class TriggerDirectory(Directory):
                     self.formdata.evolution[-1].add_part(
                         WorkflowTriggeredEvolutionPart(component, workflow_data, 'jump')
                     )
+                    if workflow_data is not None and not isinstance(workflow_data, dict):
+                        # for historical reason dictionaries are stored as-is, other data
+                        # types are embedded in a new dictionary.
+                        workflow_data = {component: workflow_data}
                     self.formdata.store()
                     self.formdata.record_workflow_event('api-trigger', action_item_id=item.id)
                     url = jump_and_perform(self.formdata, item, workflow_data=workflow_data)