(sqlite3.OperationalError) no such table: users（关键词：Web开发/Flask/数据库/SQLite/bug）
报错信息简短版：
OperationalError: (sqlite3.OperationalError) no such table: users报错信息完整版：
(venv_flask_henry) henry@henry-virtual-machine:~/dev/flask_henry$ python manage.py shell
/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py:794: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True or False to suppress this warning.
'SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and '
u
>>> u = User(email='[email protected]', username='john', password='cat')
>>> db.session.add(u)
>>> db.session.commit()
Traceback (most recent call last):
File "" , line 1, in
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/scoping.py", line 157, in do
return getattr(self.registry(), name)(*args, **kwargs)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 921, in commit
self.transaction.commit()
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 461, in commit
self._prepare_impl()
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 441, in _prepare_impl
self.session.flush()
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2192, in flush
self._flush(objects)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2312, in _flush
transaction.rollback(_capture_exception=True)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 66, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/session.py", line 2276, in _flush
flush_context.execute()
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py", line 389, in execute
rec.execute(self)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/unitofwork.py", line 548, in execute
uow
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py", line 181, in save_obj
mapper, table, insert)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/orm/persistence.py", line 835, in _emit_insert_statements
execute(statement, params)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 945, in execute
return meth(self, multiparams, params)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/sql/elements.py", line 263, in _execute_on_connection
return connection._execute_clauseelement(self, multiparams, params)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1053, in _execute_clauseelement
compiled_sql, distilled_params
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1189, in _execute_context
context)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1402, in _handle_dbapi_exception
exc_info
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/util/compat.py", line 203, in raise_from_cause
reraise(type(exception), exception, tb=exc_tb, cause=cause)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1182, in _execute_context
context)
File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 470, in do_execute
cursor.execute(statement, parameters)
OperationalError: (sqlite3.OperationalError) no such table: users [SQL: u'INSERT INTO users (email, username, role_id, password_hash) VALUES (?, ?, ?, ?)'] [parameters: ('[email protected]', 'john', None, 'pbkdf2:sha256:50000$LCWwNeCk$aeb7ff6a9000bc72cb48378d6d0b495be60015fe49f9edd6bbe6df6642584137')] Google搜到的：
“还没有执行数据库初始化，没有创建表吧？”
解决办法：
$ python manage.py shell
>>> db.create_all()（参考《Flask Web开发》5.8.1 创建表，P50
参考文献：
1.db插入不了数据
2.《Flask Web开发》5.8.1 创建表，P50