从Integer到String中的一个表的Column类型发生了变化。Alembic列类型更改给出了语法错误
Logic(PBase):
__tablename__ = "logic"
Id(Integer, primary_key=True)
此列改为串
Logic(PBase):
__tablename__ = "logic"
Id(String, primary_key=True)
我现在用的蒸馏器自动生成的迁移脚本。为了检测类型变化,我提供了env.py中的compare_type = True
with connectable.connect() as connection:
context.configure(
connection=connection,
target_metadata=target_metadata,
compare_type=True
)
这样做,迁移脚本生成的很好。这里是产生迁移脚本的内容:
from alembic import op # noqa
import sqlalchemy as sa # noqa
def upgrade():
### commands auto generated by Alembic - please adjust! ###
op.alter_column('logics', 'id',
existing_type=sa.INTEGER(),
type_=sa.String())
### end Alembic commands ###
def downgrade():
### commands auto generated by Alembic - please adjust! ###
op.alter_column('logics', 'id',
existing_type=sa.String(),
type_=sa.INTEGER())
### end Alembic commands ###
但是当我运行升级命令我得到一个语法错误(这里是回溯的端部):
File "/Users/amit/.virtualenvs/be_new/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 436, in do_execute cursor.execute(statement, parameters) sqlalchemy.exc.OperationalError: (OperationalError) near "ALTER": syntax error u'ALTER TABLE logics ALTER COLUMN id TYPE VARCHAR'()
什么,也许问题这里?
嘿,@amrx我加了一个有点晚的答案,看看! –