Executing the following test code:
import sqlalchemy as sa
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.dialects import postgresql
Base = declarative_base()
class MyEnum(sa.types.TypeDecorator):
impl = postgresql.ENUM
class Test(Base):
__tablename__ = 'test'
id = sa.Column(sa.Integer, primary_key=True)
enum_column = sa.Column(MyEnum('1', '2', '3', name='my_enum_type'))
engine =
sa.create_engine('postgresql://scott:tiger@localhost:5432/sqlalchemy_test')
Base.metadata.create_all(engine)
Results in the exception (traceback omitted):
sqlalchemy.exc.ProgrammingError: (ProgrammingError) type "my_enum_type"
does not exist
LINE 4: enum_column my_enum_type,
^
'\nCREATE TABLE test (\n\tid SERIAL NOT NULL, \n\tenum_column
my_enum_type, \n\tPRIMARY KEY (id)\n)\n\n' {}
Which means the PostgreSQL enumerate type isn't being created as it would
have been if the postgresql.ENUM had been used directly in the column
definition instead of the decorated MyEnum.
Is this behaviour by design or should the decorated column type be expected
to also create the corresponding PostgreSQL enumerate type?
Thanks in advance for any feedback regarding this.
--Pedro.
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