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Python

Posted by Blake Binford
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Blake Binford
Python Web Development Techdegree Student 8,998 Points

Different database problem, can't get app to run. flask social tutorial

Working in pycharm. The app will run but when i open it in the browser i get the following error.

File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1836, in call return self.wsgi_app(environ, start_response) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1820, in wsgi_app response = self.make_response(self.handle_exception(e)) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1403, in handle_exception reraise(exc_type, exc_value, tb) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise raise value File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1817, in wsgi_app response = self.full_dispatch_request() File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1477, in full_dispatch_request Open an interactive python shell in this framerv = self.handle_user_exception(e) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1381, in handle_user_exception reraise(exc_type, exc_value, tb) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/_compat.py", line 33, in reraise raise value File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1473, in full_dispatch_request rv = self.preprocess_request() File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/flask/app.py", line 1666, in preprocess_request rv = func() File "/Users/blakebinford/PycharmProjects/untitled/app.py", line 29, in before_request g.db = models.DATABASE.g.db.connect() AttributeError: 'SqliteDatabase' object has no attribute 'g'

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

Looking at the last line of the stacktrace:

File "/Users/blakebinford/PycharmProjects/untitled/app.py",
  line 29, in before_request
  g.db = models.DATABASE.g.db.connect()
  AttributeError: 'SqliteDatabase' object has no attribute 'g'

The error is saying the models.DATABASE is an SqliteDatabase object you set up in models and it has no g attribute. That means the "g" cannot follow the "DATABASE".

Line 29 should be more like:

g.db = models.DATABASE.connect()