当我把flask项目部署到heroku上后，打开app时显示**Internal Server Error**. 报错为
psycopg2.errors.UndefinedTable: relation "question" does not exist
我google下，可能是由于migrations文件导致的，于是我就把该文件删掉了。但依然出现同样的问题。
求大神帮忙，现在踩在坑里有点出不去了。
这是我的config.py文件：
import os
DEBUG = True
SECRET_KEY = os.urandom(24)
MAX_CONTENT_LENGTH = 1 * 1024 * 1024
SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')
SQLALCHEMY_TRACK_MODIFICATIONS=False
下面是heroku 的logs:
2019-11-17T08:43:29.637889+00:00 app[web.1]: [2019-11-17 08:43:29 +0000] [11] [ERROR] Error handling request /
2019-11-17T08:43:29.637935+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T08:43:29.637940+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T08:43:29.637942+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T08:43:29.637945+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T08:43:29.637947+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T08:43:29.637949+00:00 app[web.1]: psycopg2.errors.UndefinedTable: relation "question" does not exist
2019-11-17T08:43:29.637952+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T08:43:29.637955+00:00 app[web.1]: ^
2019-11-17T08:43:29.637956+00:00 app[web.1]:
2019-11-17T08:43:29.637958+00:00 app[web.1]:
2019-11-17T08:43:29.637960+00:00 app[web.1]: The above exception was the direct cause of the following exception:
2019-11-17T08:43:29.637962+00:00 app[web.1]:
2019-11-17T08:43:29.637964+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T08:43:29.637966+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 134, in handle
2019-11-17T08:43:29.637968+00:00 app[web.1]: self.handle_request(listener, req, client, addr)
2019-11-17T08:43:29.637970+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 175, in handle_request
2019-11-17T08:43:29.637972+00:00 app[web.1]: respiter = self.wsgi(environ, resp.start_response)
2019-11-17T08:43:29.637984+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2463, in __call__
2019-11-17T08:43:29.637986+00:00 app[web.1]: return self.wsgi_app(environ, start_response)
2019-11-17T08:43:29.637988+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2449, in wsgi_app
2019-11-17T08:43:29.637990+00:00 app[web.1]: response = self.handle_exception(e)
2019-11-17T08:43:29.637992+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1866, in handle_exception
2019-11-17T08:43:29.637993+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T08:43:29.637995+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T08:43:29.637997+00:00 app[web.1]: raise value
2019-11-17T08:43:29.637999+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
2019-11-17T08:43:29.638000+00:00 app[web.1]: response = self.full_dispatch_request()
2019-11-17T08:43:29.638002+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
2019-11-17T08:43:29.638004+00:00 app[web.1]: rv = self.handle_user_exception(e)
2019-11-17T08:43:29.638006+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
2019-11-17T08:43:29.638008+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T08:43:29.638010+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T08:43:29.638011+00:00 app[web.1]: raise value
2019-11-17T08:43:29.638013+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
2019-11-17T08:43:29.638015+00:00 app[web.1]: rv = self.dispatch_request()
2019-11-17T08:43:29.638017+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
2019-11-17T08:43:29.638019+00:00 app[web.1]: return self.view_functions[rule.endpoint](**req.view_args)
2019-11-17T08:43:29.638021+00:00 app[web.1]: File "/app/project.py", line 27, in index
2019-11-17T08:43:29.638023+00:00 app[web.1]: 'questions': Questions.query.order_by(desc('create_time')).all()
2019-11-17T08:43:29.638025+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3186, in all
2019-11-17T08:43:29.638027+00:00 app[web.1]: return list(self)
2019-11-17T08:43:29.638029+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3342, in __iter__
2019-11-17T08:43:29.638031+00:00 app[web.1]: return self._execute_and_instances(context)
2019-11-17T08:43:29.638033+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3367, in _execute_and_instances
2019-11-17T08:43:29.638035+00:00 app[web.1]: result = conn.execute(querycontext.statement, self._params)
2019-11-17T08:43:29.638037+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 988, in execute
2019-11-17T08:43:29.638039+00:00 app[web.1]: return meth(self, multiparams, params)
2019-11-17T08:43:29.638041+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/sql/elements.py", line 287, in _execute_on_connection
2019-11-17T08:43:29.638043+00:00 app[web.1]: return connection._execute_clauseelement(self, multiparams, params)
2019-11-17T08:43:29.638045+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1107, in _execute_clauseelement
2019-11-17T08:43:29.638047+00:00 app[web.1]: distilled_params,
2019-11-17T08:43:29.638049+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1253, in _execute_context
2019-11-17T08:43:29.638051+00:00 app[web.1]: e, statement, parameters, cursor, context
2019-11-17T08:43:29.638053+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1473, in _handle_dbapi_exception
2019-11-17T08:43:29.638055+00:00 app[web.1]: util.raise_from_cause(sqlalchemy_exception, exc_info)
2019-11-17T08:43:29.638057+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 398, in raise_from_cause
2019-11-17T08:43:29.638059+00:00 app[web.1]: reraise(type(exception), exception, tb=exc_tb, cause=cause)
2019-11-17T08:43:29.638061+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 152, in reraise
2019-11-17T08:43:29.638063+00:00 app[web.1]: raise value.with_traceback(tb)
2019-11-17T08:43:29.638076+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T08:43:29.638079+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T08:43:29.638081+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T08:43:29.638083+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T08:43:29.638085+00:00 app[web.1]: sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedTable) relation "question" does not exist
2019-11-17T08:43:29.638087+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T08:43:29.638089+00:00 app[web.1]: ^
2019-11-17T08:43:29.638091+00:00 app[web.1]:
2019-11-17T08:43:29.638095+00:00 app[web.1]: [SQL: SELECT question.id AS question_id, question.title AS question_title, question.content AS question_content, question.create_time AS question_create_time, question.author_id AS question_author_id
2019-11-17T08:43:29.638097+00:00 app[web.1]: FROM question ORDER BY question.create_time DESC]
2019-11-17T08:43:29.638099+00:00 app[web.1]: (Background on this error at: http://sqlalche.me/e/f405)
2019-11-17T08:43:29.638285+00:00 app[web.1]: 10.61.164.89 - - [17/Nov/2019:08:43:29 +0000] "GET / HTTP/1.1" 500 0 "-" "-"
2019-11-17T08:44:42.918911+00:00 app[web.1]: [2019-11-17 08:44:42 +0000] [11] [ERROR] Error handling request /
2019-11-17T08:44:42.918940+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T08:44:42.918944+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T08:44:42.918946+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T08:44:42.918948+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T08:44:42.918950+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T08:44:42.918952+00:00 app[web.1]: psycopg2.errors.UndefinedTable: relation "question" does not exist
2019-11-17T08:44:42.918955+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T08:44:42.918957+00:00 app[web.1]: ^
2019-11-17T08:44:42.918959+00:00 app[web.1]:
2019-11-17T08:44:42.918961+00:00 app[web.1]:
2019-11-17T08:44:42.918963+00:00 app[web.1]: The above exception was the direct cause of the following exception:
2019-11-17T08:44:42.918965+00:00 app[web.1]:
2019-11-17T08:44:42.918967+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T08:44:42.918969+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 134, in handle
2019-11-17T08:44:42.918971+00:00 app[web.1]: self.handle_request(listener, req, client, addr)
2019-11-17T08:44:42.918973+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 175, in handle_request
2019-11-17T08:44:42.918975+00:00 app[web.1]: respiter = self.wsgi(environ, resp.start_response)
2019-11-17T08:44:42.918977+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2463, in __call__
2019-11-17T08:44:42.918979+00:00 app[web.1]: return self.wsgi_app(environ, start_response)
2019-11-17T08:44:42.918981+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2449, in wsgi_app
2019-11-17T08:44:42.918983+00:00 app[web.1]: response = self.handle_exception(e)
2019-11-17T08:44:42.918985+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1866, in handle_exception
2019-11-17T08:44:42.918988+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T08:44:42.918989+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T08:44:42.918991+00:00 app[web.1]: raise value
2019-11-17T08:44:42.918994+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
2019-11-17T08:44:42.918996+00:00 app[web.1]: response = self.full_dispatch_request()
2019-11-17T08:44:42.918998+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
2019-11-17T08:44:42.919000+00:00 app[web.1]: rv = self.handle_user_exception(e)
2019-11-17T08:44:42.919002+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
2019-11-17T08:44:42.919004+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T08:44:42.919006+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T08:44:42.919008+00:00 app[web.1]: raise value
2019-11-17T08:44:42.919010+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
2019-11-17T08:44:42.919012+00:00 app[web.1]: rv = self.dispatch_request()
2019-11-17T08:44:42.919014+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
2019-11-17T08:44:42.919016+00:00 app[web.1]: return self.view_functions[rule.endpoint](**req.view_args)
2019-11-17T08:44:42.919018+00:00 app[web.1]: File "/app/project.py", line 27, in index
2019-11-17T08:44:42.919020+00:00 app[web.1]: 'questions': Questions.query.order_by(desc('create_time')).all()
2019-11-17T08:44:42.919022+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3186, in all
2019-11-17T08:44:42.919025+00:00 app[web.1]: return list(self)
2019-11-17T08:44:42.919027+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3342, in __iter__
2019-11-17T08:44:42.919028+00:00 app[web.1]: return self._execute_and_instances(context)
2019-11-17T08:44:42.919031+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3367, in _execute_and_instances
2019-11-17T08:44:42.919033+00:00 app[web.1]: result = conn.execute(querycontext.statement, self._params)
2019-11-17T08:44:42.919035+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 988, in execute
2019-11-17T08:44:42.919037+00:00 app[web.1]: return meth(self, multiparams, params)
2019-11-17T08:44:42.919039+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/sql/elements.py", line 287, in _execute_on_connection
2019-11-17T08:44:42.919041+00:00 app[web.1]: return connection._execute_clauseelement(self, multiparams, params)
2019-11-17T08:44:42.919043+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1107, in _execute_clauseelement
2019-11-17T08:44:42.919046+00:00 app[web.1]: distilled_params,
2019-11-17T08:44:42.919048+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1253, in _execute_context
2019-11-17T08:44:42.919050+00:00 app[web.1]: e, statement, parameters, cursor, context
2019-11-17T08:44:42.919052+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1473, in _handle_dbapi_exception
2019-11-17T08:44:42.919054+00:00 app[web.1]: util.raise_from_cause(sqlalchemy_exception, exc_info)
2019-11-17T08:44:42.919056+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 398, in raise_from_cause
2019-11-17T08:44:42.919058+00:00 app[web.1]: reraise(type(exception), exception, tb=exc_tb, cause=cause)
2019-11-17T08:44:42.919060+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 152, in reraise
2019-11-17T08:44:42.919063+00:00 app[web.1]: raise value.with_traceback(tb)
2019-11-17T08:44:42.919074+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T08:44:42.919077+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T08:44:42.919079+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T08:44:42.919081+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T08:44:42.919083+00:00 app[web.1]: sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedTable) relation "question" does not exist
2019-11-17T08:44:42.919085+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T08:44:42.919087+00:00 app[web.1]: ^
2019-11-17T08:44:42.919088+00:00 app[web.1]:
2019-11-17T08:44:42.919091+00:00 app[web.1]: [SQL: SELECT question.id AS question_id, question.title AS question_title, question.content AS question_content, question.create_time AS question_create_time, question.author_id AS question_author_id
2019-11-17T08:44:42.919094+00:00 app[web.1]: FROM question ORDER BY question.create_time DESC]
2019-11-17T08:44:42.919096+00:00 app[web.1]: (Background on this error at: http://sqlalche.me/e/f405)
2019-11-17T08:44:42.919234+00:00 app[web.1]: 10.5.225.117 - - [17/Nov/2019:08:44:42 +0000] "GET / HTTP/1.1" 500 0 "-" "-"
2019-11-17T08:44:42.918749+00:00 heroku[router]: at=info method=GET path="/" host=tianliang-flask-app.herokuapp.com request_id=c195162e-6529-4fb0-9aac-1d9dd9a450e8 fwd="58.182.174.147" dyno=web.1 connect=1ms service=7ms status=500 bytes=244 protocol=https
2019-11-17T09:02:25.748890+00:00 app[web.1]: [2019-11-17 09:02:25 +0000] [12] [ERROR] Error handling request /
2019-11-17T09:02:25.748917+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T09:02:25.748921+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T09:02:25.748923+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T09:02:25.748932+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T09:02:25.748934+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T09:02:25.748936+00:00 app[web.1]: psycopg2.errors.UndefinedTable: relation "question" does not exist
2019-11-17T09:02:25.748939+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T09:02:25.748943+00:00 app[web.1]: ^
2019-11-17T09:02:25.748944+00:00 app[web.1]:
2019-11-17T09:02:25.748947+00:00 app[web.1]:
2019-11-17T09:02:25.748949+00:00 app[web.1]: The above exception was the direct cause of the following exception:
2019-11-17T09:02:25.748950+00:00 app[web.1]:
2019-11-17T09:02:25.748952+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T09:02:25.748953+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 134, in handle
2019-11-17T09:02:25.748955+00:00 app[web.1]: self.handle_request(listener, req, client, addr)
2019-11-17T09:02:25.748956+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 175, in handle_request
2019-11-17T09:02:25.748958+00:00 app[web.1]: respiter = self.wsgi(environ, resp.start_response)
2019-11-17T09:02:25.748991+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2463, in __call__
2019-11-17T09:02:25.748994+00:00 app[web.1]: return self.wsgi_app(environ, start_response)
2019-11-17T09:02:25.748996+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2449, in wsgi_app
2019-11-17T09:02:25.748998+00:00 app[web.1]: response = self.handle_exception(e)
2019-11-17T09:02:25.749000+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1866, in handle_exception
2019-11-17T09:02:25.749002+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T09:02:25.749004+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T09:02:25.749006+00:00 app[web.1]: raise value
2019-11-17T09:02:25.749008+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
2019-11-17T09:02:25.749010+00:00 app[web.1]: response = self.full_dispatch_request()
2019-11-17T09:02:25.749012+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
2019-11-17T09:02:25.749014+00:00 app[web.1]: rv = self.handle_user_exception(e)
2019-11-17T09:02:25.749016+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
2019-11-17T09:02:25.749018+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T09:02:25.749020+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T09:02:25.749023+00:00 app[web.1]: raise value
2019-11-17T09:02:25.749024+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
2019-11-17T09:02:25.749026+00:00 app[web.1]: rv = self.dispatch_request()
2019-11-17T09:02:25.749027+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
2019-11-17T09:02:25.749029+00:00 app[web.1]: return self.view_functions[rule.endpoint](**req.view_args)
2019-11-17T09:02:25.749030+00:00 app[web.1]: File "/app/project.py", line 27, in index
2019-11-17T09:02:25.749032+00:00 app[web.1]: 'questions': Questions.query.order_by(desc('create_time')).all()
2019-11-17T09:02:25.749033+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3186, in all
2019-11-17T09:02:25.749036+00:00 app[web.1]: return list(self)
2019-11-17T09:02:25.749038+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3342, in __iter__
2019-11-17T09:02:25.749039+00:00 app[web.1]: return self._execute_and_instances(context)
2019-11-17T09:02:25.749041+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3367, in _execute_and_instances
2019-11-17T09:02:25.749042+00:00 app[web.1]: result = conn.execute(querycontext.statement, self._params)
2019-11-17T09:02:25.749044+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 988, in execute
2019-11-17T09:02:25.749045+00:00 app[web.1]: return meth(self, multiparams, params)
2019-11-17T09:02:25.749047+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/sql/elements.py", line 287, in _execute_on_connection
2019-11-17T09:02:25.749048+00:00 app[web.1]: return connection._execute_clauseelement(self, multiparams, params)
2019-11-17T09:02:25.749050+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1107, in _execute_clauseelement
2019-11-17T09:02:25.749051+00:00 app[web.1]: distilled_params,
2019-11-17T09:02:25.749053+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1253, in _execute_context
2019-11-17T09:02:25.749054+00:00 app[web.1]: e, statement, parameters, cursor, context
2019-11-17T09:02:25.749056+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1473, in _handle_dbapi_exception
2019-11-17T09:02:25.749057+00:00 app[web.1]: util.raise_from_cause(sqlalchemy_exception, exc_info)
2019-11-17T09:02:25.749059+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 398, in raise_from_cause
2019-11-17T09:02:25.749060+00:00 app[web.1]: reraise(type(exception), exception, tb=exc_tb, cause=cause)
2019-11-17T09:02:25.749062+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 152, in reraise
2019-11-17T09:02:25.749063+00:00 app[web.1]: raise value.with_traceback(tb)
2019-11-17T09:02:25.749074+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T09:02:25.749076+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T09:02:25.749078+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T09:02:25.749080+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T09:02:25.749082+00:00 app[web.1]: sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedTable) relation "question" does not exist
2019-11-17T09:02:25.749084+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T09:02:25.749087+00:00 app[web.1]: ^
2019-11-17T09:02:25.749089+00:00 app[web.1]:
2019-11-17T09:02:25.749092+00:00 app[web.1]: [SQL: SELECT question.id AS question_id, question.title AS question_title, question.content AS question_content, question.create_time AS question_create_time, question.author_id AS question_author_id
2019-11-17T09:02:25.749094+00:00 app[web.1]: FROM question ORDER BY question.create_time DESC]
2019-11-17T09:02:25.749096+00:00 app[web.1]: (Background on this error at: http://sqlalche.me/e/f405)
2019-11-17T09:02:25.749271+00:00 app[web.1]: 10.69.244.94 - - [17/Nov/2019:09:02:25 +0000] "GET / HTTP/1.1" 500 0 "-" "-"
2019-11-17T09:02:25.755053+00:00 heroku[router]: at=info method=GET path="/" host=tianliang-flask-app.herokuapp.com request_id=181975e4-7c78-4f7f-b131-4b1ddb544e02 fwd="58.182.174.147" dyno=web.1 connect=0ms service=92ms status=500 bytes=244 protocol=https
2019-11-17T09:06:00.663577+00:00 heroku[router]: at=info method=GET path="/" host=tianliang-flask-app.herokuapp.com request_id=571550f7-554b-42d0-b127-0a4837f6aae9 fwd="58.182.174.147" dyno=web.1 connect=1ms service=17ms status=500 bytes=244 protocol=https
2019-11-17T09:06:00.661593+00:00 app[web.1]: [2019-11-17 09:06:00 +0000] [11] [ERROR] Error handling request /
2019-11-17T09:06:00.661619+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T09:06:00.662439+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T09:06:00.662443+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T09:06:00.662447+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T09:06:00.662449+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T09:06:00.662452+00:00 app[web.1]: psycopg2.errors.UndefinedTable: relation "question" does not exist
2019-11-17T09:06:00.662455+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T09:06:00.662457+00:00 app[web.1]: ^
2019-11-17T09:06:00.662459+00:00 app[web.1]:
2019-11-17T09:06:00.662461+00:00 app[web.1]:
2019-11-17T09:06:00.662464+00:00 app[web.1]: The above exception was the direct cause of the following exception:
2019-11-17T09:06:00.662466+00:00 app[web.1]:
2019-11-17T09:06:00.662471+00:00 app[web.1]: Traceback (most recent call last):
2019-11-17T09:06:00.662473+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 134, in handle
2019-11-17T09:06:00.662476+00:00 app[web.1]: self.handle_request(listener, req, client, addr)
2019-11-17T09:06:00.662478+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 175, in handle_request
2019-11-17T09:06:00.662480+00:00 app[web.1]: respiter = self.wsgi(environ, resp.start_response)
2019-11-17T09:06:00.662483+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2463, in __call__
2019-11-17T09:06:00.662486+00:00 app[web.1]: return self.wsgi_app(environ, start_response)
2019-11-17T09:06:00.662488+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2449, in wsgi_app
2019-11-17T09:06:00.662491+00:00 app[web.1]: response = self.handle_exception(e)
2019-11-17T09:06:00.662493+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1866, in handle_exception
2019-11-17T09:06:00.662495+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T09:06:00.662498+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T09:06:00.662500+00:00 app[web.1]: raise value
2019-11-17T09:06:00.662502+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
2019-11-17T09:06:00.662505+00:00 app[web.1]: response = self.full_dispatch_request()
2019-11-17T09:06:00.662507+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
2019-11-17T09:06:00.662509+00:00 app[web.1]: rv = self.handle_user_exception(e)
2019-11-17T09:06:00.662511+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
2019-11-17T09:06:00.662513+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-11-17T09:06:00.662515+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
2019-11-17T09:06:00.662517+00:00 app[web.1]: raise value
2019-11-17T09:06:00.662519+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
2019-11-17T09:06:00.662521+00:00 app[web.1]: rv = self.dispatch_request()
2019-11-17T09:06:00.662523+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
2019-11-17T09:06:00.662526+00:00 app[web.1]: return self.view_functions[rule.endpoint](**req.view_args)
2019-11-17T09:06:00.662528+00:00 app[web.1]: File "/app/project.py", line 27, in index
2019-11-17T09:06:00.662530+00:00 app[web.1]: 'questions': Questions.query.order_by(desc('create_time')).all()
2019-11-17T09:06:00.662532+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3186, in all
2019-11-17T09:06:00.662535+00:00 app[web.1]: return list(self)
2019-11-17T09:06:00.662537+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3342, in __iter__
2019-11-17T09:06:00.662539+00:00 app[web.1]: return self._execute_and_instances(context)
2019-11-17T09:06:00.662541+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3367, in _execute_and_instances
2019-11-17T09:06:00.662544+00:00 app[web.1]: result = conn.execute(querycontext.statement, self._params)
2019-11-17T09:06:00.662546+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 988, in execute
2019-11-17T09:06:00.662548+00:00 app[web.1]: return meth(self, multiparams, params)
2019-11-17T09:06:00.662550+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/sql/elements.py", line 287, in _execute_on_connection
2019-11-17T09:06:00.662552+00:00 app[web.1]: return connection._execute_clauseelement(self, multiparams, params)
2019-11-17T09:06:00.662555+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1107, in _execute_clauseelement
2019-11-17T09:06:00.662557+00:00 app[web.1]: distilled_params,
2019-11-17T09:06:00.662559+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1253, in _execute_context
2019-11-17T09:06:00.662562+00:00 app[web.1]: e, statement, parameters, cursor, context
2019-11-17T09:06:00.662564+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1473, in _handle_dbapi_exception
2019-11-17T09:06:00.662566+00:00 app[web.1]: util.raise_from_cause(sqlalchemy_exception, exc_info)
2019-11-17T09:06:00.662568+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 398, in raise_from_cause
2019-11-17T09:06:00.662570+00:00 app[web.1]: reraise(type(exception), exception, tb=exc_tb, cause=cause)
2019-11-17T09:06:00.662573+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 152, in reraise
2019-11-17T09:06:00.662575+00:00 app[web.1]: raise value.with_traceback(tb)
2019-11-17T09:06:00.662587+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1249, in _execute_context
2019-11-17T09:06:00.662590+00:00 app[web.1]: cursor, statement, parameters, context
2019-11-17T09:06:00.662592+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 580, in do_execute
2019-11-17T09:06:00.662594+00:00 app[web.1]: cursor.execute(statement, parameters)
2019-11-17T09:06:00.662596+00:00 app[web.1]: sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedTable) relation "question" does not exist
2019-11-17T09:06:00.662599+00:00 app[web.1]: LINE 2: FROM question ORDER BY question.create_time DESC
2019-11-17T09:06:00.662601+00:00 app[web.1]: ^
2019-11-17T09:06:00.662603+00:00 app[web.1]:
2019-11-17T09:06:00.662607+00:00 app[web.1]: [SQL: SELECT question.id AS question_id, question.title AS question_title, question.content AS question_content, question.create_time AS question_create_time, question.author_id AS question_author_id
2019-11-17T09:06:00.662609+00:00 app[web.1]: FROM question ORDER BY question.create_time DESC]
