问题描述
从github上pull了别人的项目学习,项目用flask-migrate来迁移数据库。查看了一下,作者把数据库文件 app.db 删除了,不过migrations文件夹留着的,因此我只需要用命令 flask db migrate 和 flask db upgrade 来建立数据库文件就行了。执行过程中报错如下:
c:usersadministratorappdatalocalprogramspythonpython37libsite-packagesflask_sqlalchemy\__init__.py:814: UserWarning: Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. Defaulting SQLALCHEMY_DATABASE_URI to "sqlite:///:memory:".
'Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. '
c:usersadministratorappdatalocalprogramspythonpython37libsite-packagesflask_sqlalchemy\__init__.py:835: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True or False to suppress this warning.
'SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and '
INFO [alembic.runtime.migration] Context impl SQLiteImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
ERROR [root] Error: Target database is not up to date.
排查了各个方面,配置文件没问题,model没问题,__init__文件也没问题。
解决方案
醉了,执行flask db之前先导入项目啊!!!!!!!!!!!!!!
不然flask怎么知道你要执行哪个呢????????????????