houqp commented on a change in pull request #13278:
URL: https://github.com/apache/airflow/pull/13278#discussion_r548841779
##########
File path: airflow/utils/types.py
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@@ -16,8 +16,31 @@
# under the License.
import enum
+from sqlalchemy.types import TypeDecorator, String
-class DagRunType(str, enum.Enum):
+
+class EnumString(TypeDecorator):
+ """
+ Declare db column with this type to make the column compatible with string
+ and string based enum values when building the sqlalchemy ORM query. It can
+ be used just like sqlalchemy.types.String, for example:
+
+ ```
+ class Table(Base):
+ __tablename__ = "t"
+ run_type = Column(EnumString(50), nullable=False)
+ ```
+ """
+ impl = String
+
+ def process_bind_param(self, value, dialect):
+ if isinstance(value, enum.Enum):
+ return value.value
+ else:
+ return value
+
+
+class DagRunType(enum.Enum):
Review comment:
I pushed a new commit to switch to sqlalchemy enum type with native enum
and check constraint disabled, which should address all our concerns without
requiring a schema migration. I think this strikes a good balance.
@ashb @potiuk @kaxil thoughts? Or do you all prefer to go all in and migrate
to native db enum type instead?
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