Adding implementation of method __repr__ for DB models

Change-Id: I5ba1009a4ebf02b3da826c6dd5e78aa0ec9412f4

mistral/db/sqlalchemy/model_base.py

@@ -66,6 +66,9 @@ class _MistralBase(oslo_models.ModelBase, oslo_models.TimestampMixin):
 
         return d
 
+    def __repr__(self):
+        return '%s %s' % (type(self).__name__, self.to_dict().__repr__())
+
 
 def datetime_to_str(dct, attr_name):
     if dct.get(attr_name) is not None:

mistral/tests/unit/db/v2/test_sqlalchemy_db_api.py

@@ -155,6 +155,12 @@ class WorkbookTest(test_base.DbTestCase):
         self.assertEqual(created0, fetched[0])
         self.assertEqual('public', created0['scope'])
 
+    def test_workbook_repr(self):
+        s = db_api.create_workbook(WORKBOOKS[0]).__repr__()
+
+        self.assertIn('Workbook ', s)
+        self.assertIn("'name': 'my_workbook1'", s)
+        self.assertIn("'description': 'my description'", s)
 
 EXECUTIONS = [
     {
@@ -224,6 +230,13 @@ class ExecutionTest(test_base.DbTestCase):
             created['id']
         )
 
+    def test_execution_repr(self):
+        s = db_api.create_execution(EXECUTIONS[0]).__repr__()
+
+        self.assertIn('Execution ', s)
+        self.assertIn("'id': '1'", s)
+        self.assertIn("'state': 'IDLE'", s)
+
 
 TASKS = [
     {
@@ -334,6 +347,18 @@ class TaskTest(test_base.DbTestCase):
             created['id']
         )
 
+    def test_task_repr(self):
+        ex = db_api.create_execution(EXECUTIONS[0])
+
+        values = copy.copy(TASKS[0])
+        values.update({'execution_id': ex.id})
+
+        s = db_api.create_task(values).__repr__()
+
+        self.assertIn('Task ', s)
+        self.assertIn("'id': '1'", s)
+        self.assertIn("'name': 'my_task1'", s)
+
 
 class TXTest(test_base.DbTestCase):
     def test_rollback(self):