python - sqlalchemy.exc.UnboundExecutionError : Table object 'responsibles' is not bound to an Engine or Connection

我正在尝试使用SQLAlchemy Migrate迁移表，但出现此错误:

sqlalchemy.exc.UnboundExecutionError: Table object 'responsibles' is not bound to an Engine or Connection.  Execution can not proceed without a database to execute against.

当我运行时:

python manage.py test

这是我的迁移文件:

from sqlalchemy import *
from migrate import *

meta = MetaData()

responsibles = Table(
    'responsibles', meta,
    Column('id', Integer, primary_key=True),
    Column('breakdown_type', String(255)),
    Column('breakdown_name', String(500)),
    Column('email', String(255)),
    Column('name', String(255)),
)

def upgrade(migrate_engine):
    # Upgrade operations go here. Don't create your own engine; bind
    # migrate_engine to your metadata
    responsibles.create()

def downgrade(migrate_engine):
    # Operations to reverse the above upgrade go here.
    responsibles.drop()

最佳答案

您创建引擎了吗？像这样
engine = create_engine('sqlite:///:memory:')
然后做
meta.bind = enginemeta.create_all(engine)

关于python - sqlalchemy.exc.UnboundExecutionError : Table object 'responsibles' is not bound to an Engine or Connection，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/45045147/