[GitHub] [airflow] nuclearpinguin commented on a change in pull request #6489: [AIRFLOW-3959] add UI filter with DAGs tags

[GitBox <gi...@apache.org>]

nuclearpinguin commented on a change in pull request #6489: [AIRFLOW-3959] add UI filter with DAGs tags
URL: https://github.com/apache/airflow/pull/6489#discussion_r341821527
 
 

 ##########
 File path: airflow/models/dag.py
 ##########
 @@ -1516,6 +1524,45 @@ def _test_cycle_helper(self, visit_map, task_id):
         visit_map[task_id] = DagBag.CYCLE_DONE
 
 
+dagtags = Table(
+    'dag_tag', Base.metadata,
+    Column('tag', String(100), ForeignKey('tag.name')),
+    Column('dag_id', String(100), ForeignKey('dag.dag_id')),
+)
+
+
+class Tag(Base):
+    __tablename__ = "tag"
+    name = Column(String(100), primary_key=True)
+
+    @staticmethod
+    @provide_session
+    def get_instance(name: str, session=None):
+        """
+            Selecting the tag from the DB, if doesn't exists - creates it.
 
 Review comment:
   I think the indention is unnecessary

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