houqp commented on a change in pull request #13278:
URL: https://github.com/apache/airflow/pull/13278#discussion_r548275287
##########
File path: airflow/utils/types.py
##########
@@ -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:
How did you perform the mysql test? This bug won't cause any error for
airflow installations setup from scratch, including existing unit tests. You
should be able to reproduce the bug with my newly added test case in breeze.
I am open to better way to handle this as well, but I think whatever
solution we end up with, we should aim for consistent behavior between db
drivers.
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