Flash data model migration error

About the flask Inside Model An error is reported during migration

Flask Use flask_migrate Medium migrate Command and flask_sqlalchemy The reason why the table creation file cannot be generated , Tips ：INFO [alembic.env] No changes in schema detected.

function python manage.py db init You can generate folders

function python manage.py db migrate Unable to generate table creation file , migrations Under folder versions It's empty , And there are hints INFO [alembic.env] No changes in schema detected.

As a result, we can't migrate files , At the same time windows Another one will be reported next

Warning: (1366, “Incorrect string value: ‘\xD6\xD0\xB9\xFA\xB1\xEA…’ for column ‘VARIABLE_VAL
UE’ at row 484”)
result = self._query(query) Warning , Estimation is Windows The default encoding is GBK, Caused by , This is not the reason why the table creation file cannot be generated .

resolvent ： I've been looking online for a long time , Last in https://www.2cto.com/net/201610/559848.html Here's why , Is due to ‘ original flask-migrate Context detection is db.Model To create a table …’, So we have to make this app Can know that there is this models Existence of file , therefore , stay app In the folder of __init__ Add... To the folder , Because we are manage.py Import app File in , Will automatically import __init__.py Folder , Or in manage.py Import in

stay __init__.py perhaps manage.py Import models All the classes in it

• from App.models import *