之前已经把：
class Task(db.Model): __tablename__ = ‘tasks’ initiatorId = db.Column(db.String(64), db.ForeignKey("users.id”)) errandorId = db.Column(db.String(64), db.ForeignKey("users.id”)) |
改为：
class Task(db.Model): __tablename__ = ‘tasks’ initiatorId = db.Column(db.String(64), db.ForeignKey("users.id”), default="") errandorId = db.Column(db.String(64), db.ForeignKey("users.id”), default=“") |
然后升级成功了：
(RunningFast) ➜ staging python db_manager.py db migrate -m "add default to empty string for initiatorId and errandorId of Task" <div–<—————————————————————————— DEBUG in app [/root/RunningFast/staging/runningfast/app.py:113]: app=<Flask ‘runningfast.app’>, server_port=21085, api=<flask_restful.Api object at 0x7fe5edb35310>, redis_store=<flask_redis.FlaskRedis object at 0x7fe5efdb38d0>, db=<SQLAlchemy engine=’mysql://runningfast:Jiandao123@localhost/runningfast_dev’>, server_mode=staging, server_type=develop, rq=<flask_rq2.app.RQ object at 0x7fe5edb35750>, sockets=<flask_sockets.Sockets object at 0x7fe5edb35ad0> <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in app [/root/RunningFast/staging/runningfast/app.py:213]: API_VERSION=1.0, API_URL_PREFIX=/runningfast/api/v1.0, OPEN_API_URL_PREFIX=/runningfast/api/v1.0/open <div–<—————————————————————————— INFO [alembic.runtime.migration] Context impl MySQLImpl. INFO [alembic.runtime.migration] Will assume non-transactional DDL. INFO [alembic.autogenerate.compare] Detected added foreign key (errandorBillTaskId)(id) on table bills INFO [alembic.autogenerate.compare] Detected added foreign key (initiatorBillTaskId)(id) on table bills INFO [alembic.autogenerate.compare] Detected added foreign key (initiatorTaskId)(id) on table resources INFO [alembic.autogenerate.compare] Detected added foreign key (errandorTaskId)(id) on table resources INFO [alembic.autogenerate.compare] Detected added foreign key (errandorId)(id) on table tasks INFO [alembic.autogenerate.compare] Detected added foreign key (errandorEndLocationId)(id) on table tasks INFO [alembic.autogenerate.compare] Detected added foreign key (initiatorEndLocationId)(id) on table tasks INFO [alembic.autogenerate.compare] Detected added foreign key (initiatorStartLocationId)(id) on table tasks INFO [alembic.autogenerate.compare] Detected added foreign key (errandorStartLocationId)(id) on table tasks INFO [alembic.autogenerate.compare] Detected added foreign key (initiatorId)(id) on table tasks INFO [alembic.autogenerate.compare] Detected added foreign key (task_id)(id) on table tasks_promotions INFO [alembic.autogenerate.compare] Detected added foreign key (promotion_id)(id) on table tasks_promotions INFO [alembic.autogenerate.compare] Detected added foreign key (locationId)(id) on table users Generating /root/RunningFast/staging/migrations/versions/98741b084631_add_default_to_empty_string_for_.py … done (RunningFast) ➜ staging python db_manager.py db upgrade <div–<—————————————————————————— DEBUG in app [/root/RunningFast/staging/runningfast/app.py:113]: app=<Flask ‘runningfast.app’>, server_port=21085, api=<flask_restful.Api object at 0x7f45541be310>, redis_store=<flask_redis.FlaskRedis object at 0x7f455643c8d0>, db=<SQLAlchemy engine=’mysql://runningfast:Jiandao123@localhost/runningfast_dev’>, server_mode=staging, server_type=develop, rq=<flask_rq2.app.RQ object at 0x7f45541be750>, sockets=<flask_sockets.Sockets object at 0x7f45541bead0> <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in app [/root/RunningFast/staging/runningfast/app.py:213]: API_VERSION=1.0, API_URL_PREFIX=/runningfast/api/v1.0, OPEN_API_URL_PREFIX=/runningfast/api/v1.0/open <div–<—————————————————————————— INFO [alembic.runtime.migration] Context impl MySQLImpl. INFO [alembic.runtime.migration] Will assume non-transactional DDL. INFO [alembic.runtime.migration] Running upgrade d48c252c778a -> 98741b084631, add default to empty string for initiatorId and errandorId of Task |
现在继续去把：
class Task(db.Model): __tablename__ = ‘tasks’ initiatorId = db.Column(db.String(64), db.ForeignKey("users.id”), default="") errandorId = db.Column(db.String(64), db.ForeignKey("users.id”), default=“") |
改为：
class Task(db.Model): __tablename__ = ‘tasks’ initiatorId = db.Column(db.String(64), db.ForeignKey("users.id"), nullable=False, default="") errandorId = db.Column(db.String(64), db.ForeignKey("users.id"), nullable=False, default=“") |
然后去升级，结果有警告：
(RunningFast) ➜ staging python db_manager.py db upgrade <div–<—————————————————————————— DEBUG in app [/root/RunningFast/staging/runningfast/app.py:113]: app=<Flask ‘runningfast.app’>, server_port=21085, api=<flask_restful.Api object at 0x7fe0b01ac310>, redis_store=<flask_redis.FlaskRedis object at 0x7fe0b242a8d0>, db=<SQLAlchemy engine=’mysql://runningfast:Jiandao123@localhost/runningfast_dev’>, server_mode=staging, server_type=develop, rq=<flask_rq2.app.RQ object at 0x7fe0b01ac750>, sockets=<flask_sockets.Sockets object at 0x7fe0b01acad0> <div–<—————————————————————————— <div–<—————————————————————————— DEBUG in app [/root/RunningFast/staging/runningfast/app.py:213]: API_VERSION=1.0, API_URL_PREFIX=/runningfast/api/v1.0, OPEN_API_URL_PREFIX=/runningfast/api/v1.0/open <div–<—————————————————————————— INFO [alembic.runtime.migration] Context impl MySQLImpl. INFO [alembic.runtime.migration] Will assume non-transactional DDL. INFO [alembic.runtime.migration] Running upgrade 98741b084631 -> 2fcd2aa96580, add nullable to False for initiatorId and errandorId of Task /root/Envs/RunningFast/lib/python2.7/site-packages/sqlalchemy/engine/default.py:462: Warning: Data truncated for column ‘errandorId’ at row 2 cursor.execute(statement, parameters) /root/Envs/RunningFast/lib/python2.7/site-packages/sqlalchemy/engine/default.py:462: Warning: Data truncated for column ‘errandorId’ at row 3 cursor.execute(statement, parameters) 。。。 /root/Envs/RunningFast/lib/python2.7/site-packages/sqlalchemy/engine/default.py:462: Warning: Data truncated for column ‘errandorId’ at row 67 cursor.execute(statement, parameters) |
不过去看数据库中字段已经生效了：
的确默认不是NULL，而是空字符串了：
所以暂时不去操心这个警告了。
转载请注明：在路上 » 【记录】Flask-Migrate升级时出现警告：Warning: Data truncated for column at row cursor.execute(statement, parameters)