we need a commit at the end, but I don't really believe that.

crc/api.py

@@ -59,6 +59,7 @@ def add_workflow_to_study(study_id, body):
                              study_id=study_id,
                              workflow_spec_id=workflow_spec_model.id)
     db.session.add(workflow)
+    db.session.commit()
 
 def get_workflow(workflow_id):
     return db.session.query(WorkflowModel).filter_by(id=workflow_id).first()

tests/test_api.py

@@ -60,4 +60,5 @@ class TestStudy(BaseTest, unittest.TestCase):
         self.assertEqual(study.id, workflow.study_id)
         self.assertEqual(WorkflowStatus.user_input_required, workflow.status)
         self.assertIsNotNone(workflow.bpmn_workflow_json)
-        self.assertEqual(spec.id, workflow.workflow_spec_id)
+        self.assertEqual(spec.id, workflow.workflow_spec_id)
+