问题复现:

INFO  [alembic.runtime.migration] Context impl SQLiteImpl.

INFO  [alembic.runtime.migration] Will assume non-transactional DDL.

INFO  [alembic.env] No changes in schema detected.

配置文件:

#!/usr/bin/env python

# -*- coding: utf-8 -*-

"""

#

# Authors: limanman

# 51CTOBG: http://xmdevops.blog.51cto.com/

# Purpose:

#

"""

from __future__ import absolute_import

# 说明: 配置基类

class __Config(object):

    # -- flask-pids

    PID_FILE = 'logs/xmzoomeye-mtr.pid'

    # -- flask-sqlalchemy

    SQLALCHEMY_ECHO = True

    SQLALCHEMY_RECORD_QUERIES = True

    SQLALCHEMY_NATIVE_UNICODE = True

    SQLALCHEMY_TRACK_MODIFICATIONS = True

    SQLALCHEMY_COMMIT_ON_TEARDOWN = True

    SQLALCHEMY_DATABASE_URI = 'sqlite:///app/conf/mtrdata.db'

    @staticmethod

    def init_app(app):

        pass

# 说明: 开发环境

class __DevelopmentConfig(__Config):

    pass

# 说明: 预测环境

class __TestingConfig(__Config):

    pass

# 说明: 正式环境

class __ProductionConfig(__Config):

    pass

config = {

    'default': __DevelopmentConfig,

    'develop': __DevelopmentConfig,

    'testing': __TestingConfig,

    'product': __ProductionConfig,

}

问题排查:

1. 此应用为一个网络检测展示程序,为了简化就没有使用任务队列,直接后端跑一个mtr检测,利用协程的方式不影响前端数据获取和展示

2. 框架写好后发现迁移命令python xmzoomeye-mtr db init时发现flask-migrate竟然没有检测到我定义的表....., 这是什么鬼?

3. 后来无意间看到网上的一段代码突然发现...自己没有在任何一个文件中导入过自定义的表....动手尝试~ 竟然成功.... 原来flask-migrate是检测上下文中db.Model的子类来创建表的...

解决方案:

#!/usr/bin/env python

# -*- coding: utf-8 -*-

"""

#

# Authors: limanman

# OsChina: http://xmdevops.blog.51cto.com/

# Purpose:

#

"""

# 说明: 导入公共模块

from app import db as _db

from app import create_app

# 说明: 为数据库检测

from app.models import Area, Addr, Info

from flask_script import Manager, Command

from flask_migrate import Migrate, MigrateCommand

# 说明: 导入其它模块

app = create_app()

manager = Manager(app)

migrate = Migrate(app, _db)

manager.add_command('db', MigrateCommand)

if __name__ == '__main__':

    manager.run()

说明: 既然检测上下文中的db.Model的子类,所以只要在任意正确位置导入即可被检测到,so~ 为了方便我直接在入口文件中添加了~尝试再次初始化/迁移/升级~

再次创建:

D:XmDevOps_Pytestxmzoomeye-mtr>python xmzoomeye-mtr db init

Creating directory D:XmDevOps_Pytestxmzoomeye-mtrmigrations ... done

Creating directory D:XmDevOps_Pytestxmzoomeye-mtrmigrationsversions ... don

e

Generating D:XmDevOps_Pytestxmzoomeye-mtrmigrationsalembic.ini ... done

Generating D:XmDevOps_Pytestxmzoomeye-mtrmigrationsenv.py ... done

Generating D:XmDevOps_Pytestxmzoomeye-mtrmigrationsenv.pyc ... done

Generating D:XmDevOps_Pytestxmzoomeye-mtrmigrationsREADME ... done

Generating D:XmDevOps_Pytestxmzoomeye-mtrmigrationsscript.py.mako ... done

Please edit configuration/connection/logging settings in 'D:\XmDevOps_Py\test

xmzoomeye-mtr\migrations\alembic.ini' before proceeding.

D:XmDevOps_Pytestxmzoomeye-mtr>python xmzoomeye-mtr db migrate

INFO  [alembic.runtime.migration] Context impl SQLiteImpl.

INFO  [alembic.runtime.migration] Will assume non-transactional DDL.

INFO  [alembic.autogenerate.compare] Detected added table 'areas'

INFO  [alembic.autogenerate.compare] Detected added index 'ix_areas_areaname' on

 '['areaname']'

INFO  [alembic.autogenerate.compare] Detected added table 'addrs'

INFO  [alembic.autogenerate.compare] Detected added index 'ix_addrs_addr' on '['

addr']'

INFO  [alembic.autogenerate.compare] Detected added table 'infos'

Generating D:XmDevOps_Pytestxmzoomeye-mtrmigrationsversionse5295ab2586d_.p

y ... done

D:XmDevOps_Pytestxmzoomeye-mtr>python xmzoomeye-mtr db upgrade

INFO  [alembic.runtime.migration] Context impl SQLiteImpl.

INFO  [alembic.runtime.migration] Will assume non-transactional DDL.

INFO  [alembic.runtime.migration] Running upgrade  -> e5295ab2586d, empty messag

e

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