Django: doesn't declare an explicit app_label and isn't in an application in INSTALLED_ APPS

 出现异常: 

RuntimeError: Model class db.base_model.BaseModel doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.

解决方案: 

在项目setting文件中INSTALLED_APPS添加如下代码即可

INSTALLED_APPS = [
    "db",  # 注册名为db的应用即可
]

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转载自blog.csdn.net/Javaer2014/article/details/84569259