λ python manage.py migrate TestModel
System check identified some issues:
WARNINGS:
?: (mysql.W002) MySQL Strict Mode is not set for database connection ‘default‘
        HINT: MySQL‘s Strict Mode fixes many data integrity problems in MySQL, such as data truncation upon insertion, by escalating warnings into errors. It is strongly recommended you activate it. See: https://docs.djangoproject.com/en/3.0/ref/databases/#mysql-sql-mode
Operations to perform:
  Apply all migrations: (none)
Running migrations:
  No migrations to apply.
  Your models have changes that are not yet reflected in a migration, and so won‘t be applied.
  Run ‘manage.py makemigrations‘ to make new migrations, and then re-run ‘manage.py migrate‘ to apply them.
执行
python manage.py migrate
报错误
Your models have changes that are not yet reflected in a migration, and so won‘t be applied. Run ‘manage.py makemigrations‘ to make new migrations, and then re-run ‘manage.py migrate‘ to apply them.
这个错误是因为你的数据库文件更改需要更新一下
先执行下
python manage.py makemigrations 
在执行
python manage.py migrate
就可以成功执行了
$ python manage.py migrate TestModel   # 创建表结构原文:https://www.cnblogs.com/chengfengchi/p/13398543.html