virtualenv依赖项对ubuntu18.04的响应不好

Question

我正在两台计算机上构建这个项目，windows10和ubuntu18.04。实际上，我从未成功地完全使用过ubuntu pc。每当我试图向数据库发出post请求时，我都会遇到以下错误：

    File "/home/user/venv1/lib/python3.6/site-packages/flask/app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "/home/user/venv1/lib/python3.6/site-packages/flask_cors/extension.py", line 161, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/user/venv1/lib/python3.6/site-packages/flask/app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/user/venv1/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/home/user/venv1/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/user/venv1/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/user/venv1/lib/python3.6/site-packages/flask_cors/extension.py", line 161, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/user/venv1/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/user/venv1/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/home/user/venv1/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/user/venv1/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/user/venv1/lib/python3.6/site-packages/flask/views.py", line 84, in view
    return self.dispatch_request(*args, **kwargs)
  File "/home/user/venv1/lib/python3.6/site-packages/flask/views.py", line 149, in dispatch_request
    return meth(*args, **kwargs)
  File "/home/user/venv1/lib/python3.6/site-packages/flask_apispec/annotations.py", line 117, in wrapped
    return wrapper(*args, **kwargs)
  File "/home/user/venv1/lib/python3.6/site-packages/flask_apispec/wrapper.py", line 29, in __call__
    response = self.call_view(*args, **kwargs)
  File "/home/user/venv1/lib/python3.6/site-packages/flask_apispec/wrapper.py", line 48, in call_view
    return self.func(*args, **kwargs)
  File "/home/user/venv1/lib/python3.6/site-packages/flask_security/decorators.py", line 216, in decorated_view
    return fn(*args, **kwargs)
//project related methods which work flawlessly
  File "/home/user/venv1/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 417, in get_or_404
    rv = self.get(ident)
  File "/home/user/venv1/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 882, in get
    ident, loading.load_on_ident)
  File "/home/user/venv1/lib/python3.6/site-packages/sqlalchemy/orm/query.py", line 893, in _get_impl
    if len(ident) != len(mapper.primary_key):
TypeError: object of type 'NoneType' has no len()

不管我怎么努力：

1. pip freeze在windows virtualenv上，这就是我获得 “好”的版本，试图用相同的配置ubuntu的venv，但错误不断出现
2. 我尝试过在我的文档中不指定依赖项版本设置.py但我得到了完全相同的错误。你知道吗

我在应用程序中使用的mysql用户拥有数据库的所有权限。 我使用的是用于Linux（x86\u 64）的14.14版发行版5.7.23。 作为一个使用ubuntu18.04的新手，我需要以某种方式设置mysql吗？你知道吗

Answer 1

我已经安装了mysql 8，现在可以正常工作了。你知道吗