Unexpected LONGTEXT type

[wu-clan]

Describe the bug

Expected behavior

To Reproduce
Please try to provide a Minimal, Complete, and Verifiable example, with the migration script and/or the SQLAlchemy tables or models involved.
See also Reporting Bugs on the website.

class Api(Base):
    """Sys api"""

    __tablename__ = 'sys_api'

    id: Mapped[int] = mapped_column(primary_key=True, index=True, autoincrement=True)
    remark: Mapped[str | None] = mapped_column(LONGTEXT().with_variant(TEXT, 'postgresql'))

Error

# In versions py
sa.Column('remark', mysql.LONGTEXT(), nullable=True)

sqlalchemy.exc.CompileError: (in table 'sys_api', column 'remark'): Compiler <sqlalchemy.dialects.postgresql.base.PGTypeCompiler object at 0x000001D463CA40D0> can't render element of type LONGTEXT

Versions.

• OS: Windows11
• Python: 3.10
• Alembic: 1.14.0
• SQLAlchemy: 2.0.30
• Database: postgresql
• DBAPI: asyncpg

Additional context

postgresql+asyncpg://postgres:123456@127.0.0.1:5432/fba

Have a nice day!

[zzzeek]

alembic seems to be skipping the reverse variant at the moment. please set up the variant with generic type first as this is what alembic expects right now:

 TEXT().with_variant(LONGTEXT(), "mysql")

this will be fixed by #1585 will be in alembic 1.14.1