[GitHub] poly47 opened a new issue #3799: SQLAlchemy uri connection failed

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poly47 opened a new issue #3799: SQLAlchemy uri connection failed
URL: https://github.com/apache/incubator-superset/issues/3799
 
 
   Make sure these boxes are checked before submitting your issue - thank you!
   
   - [*] I have checked the superset logs for python stacktraces and included it here as text if any
   - [*] I have reproduced the issue with at least the latest released version of superset
   - [*] I have checked the issue tracker for the same issue and I haven't found one similar
   
   
   ### Superset version
   0.20.5
   python 3.6.3
   
   ### Expected results
   It works!
   
   ### Actual results
   ERROR: {"error": "Connsection failed!\n\nThe error message returned was:\n'NoneType' object has no attribute 'get_password_masked_url_from_uri'"}
   
   ### Steps to reproduce
   Input
   Database: People Data
   SQLAlchemy URI: mysql://root:password@localhost/People
   
   After clicking "Test Connection" button, the error raised.
   
   I followed the documentation to add a new database connection and faced this error.
   I read the core.py and thought the error is raised in "testconn" function. 
   But I  found:
   '''
       if database and uri:
       ......
           masked_url = database.get_password_masked_url_from_uri(uri)
   '''
   So I cannot figure out what happened.

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