I can't sto re Swedish characters in MySQL by using Flask_SQLAlchemy :( I have tried to find a solution for a week now and I really need help as it feels like I have reached a dead end. I think it could be something wrong with the version compatibilities abong my tools, but I don't hope so! I am trying to build an website using Flask, Flask_SQLAlchemy and MySQL (5.5.3). If this is unsolvable, I am considering changing Flask_SQLAlchemy to something else.. (I have taken one course in programming (Python) and the rest is self thought so I would be very happy if you could be as detailed as possible in your answers, very thankful for any advice as well!)
(competeEnv) C:\>conda list
# packages in environment at C:\Users\MyName\Anaconda3.1\envs\competeEnv:
#
click 6.6 py27_0
flask 0.11.1 py27_0
Flask-SQLAlchemy 2.1 <pip>
itsdangerous 0.24 py27_0
jinja2 2.8 py27_1
markupsafe 0.23 py27_2
mysql-python 1.2.5 py27_0
pip 9.0.1 py27_0
python 2.7.12 0
setuptools 27.2.0 py27_1
sqlalchemy 1.1.4 py27_0
vs2008_runtime 9.00.30729.1 2
werkzeug 0.11.11 py27_0
wheel 0.29.0 py27_0
(competeEnv) C:\>
Here is the code in testAlchemy.py file
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
app=Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:myPassword@myServer/firstdb'
app.config['SQLALCHEMY_ECHO'] = False
app.config['SQLALCHEMY_TRACK_MODIFICATIONS']=True
app.config['MYSQL_DATABASE_CHARSET'] = 'utf8mb4'
db = SQLAlchemy(app)
class Users(db.Model):
__tablename__='users'
id=db.Column('iduser', db.Integer, primary_key=True)
name=db.Column('column_name', db.String(193))
def __init__(self, name):
self.name=name
def __repr__(self):
return self.name
db.create_all()
db.session.commit()
president1=Users('Obama')
president2=Users('Trump')
db.session.add(president1)
db.session.add(president2)
db.session.commit()
Here should be some hints..
(competeEnv) C:\Users\MyName\Anaconda3.1\envs>python
Python 2.7.12 |Continuum Analytics, Inc.| (default, Jun 29 2016, 11:07:13)[MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Anaconda is brought to you by Continuum Analytics.
Please check out: http://continuum.io/thanks and https://anaconda.org
>>> from testAlchemy import Users, db
>>> db.session.add(Users('Federer'))
>>> db.session.commit()
>>> Users.query.all()
[Obama, Trump, Federer]
>>> db.session.add(Users('ä'))
>>> db.session.commit()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\scoping.py", line 157, in do
return getattr(self.registry(), name)(*args, **kwargs)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\session.py", line 801, in commit
self.transaction.commit()
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\session.py", line 392, in commit
self._prepare_impl()
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\session.py", line 372, in _prepare_impl
self.session.flush()
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\session.py", line 2019, in flush
self._flush(objects)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\session.py", line 2137, in _flush
transaction.rollback(_capture_exception=True)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\util\langhelpers.py", line 60, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\session.py", line 2101, in _flush
flush_context.execute()
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\unitofwork.py", line 373, in execute
rec.execute(self)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\unitofwork.py", line 532, in execute
uow
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\persistence.py", line 174, in save_obj
mapper, table, insert)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\orm\persistence.py", line 800, in _emit_insert_statements
execute(statement, params)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\engine\base.py", line 914, in execute
return meth(self, multiparams, params)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\sql\elements.py", line 323, in _execute_on_connection
return connection._execute_clauseelement(self, multiparams, params)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\engine\base.py", line 1010, in _execute_clauseelement
compiled_sql, distilled_params
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\engine\base.py", line 1146, in _execute_context
context)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\engine\base.py", line 1341, in _handle_dbapi_exception
exc_info
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\util\compat.py", line 202, in raise_from_cause
reraise(type(exception), exception, tb=exc_tb, cause=cause)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\engine\base.py", line 1139, in _execute_context
context)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\sqlalchemy\engine\default.py", line 450, in do_execute
cursor.execute(statement, parameters)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\MySQLdb\cursors.py", line 205, in execute
self.errorhandler(self, exc, value)
File "C:\Users\MyName\Anaconda3.1\envs\competeEnv\lib\site-packages\MySQLdb\connections.py", line 36, in defaulterrorhandler
raise errorclass, errorvalue
sqlalchemy.exc.OperationalError: (_mysql_exceptions.OperationalError) (1366, "Incorrect string value: '\\x84' for column 'column_name' at row 1") [SQL: u'INSERT INTO users (column_name) VALUES (%s)'] [parameters: ('\x84',)]
>>>
Since you're using Python 2.7, you need to specify that your string contains unicode.
>>> db.session.add(Users(u'ä'))
You can also use a future import to treat all strings as unicode.
from __future__ import unicode_literals
Alternatively you can upgrade your version of Python. 2.7 is the last version to treat strings as bytes rather than unicode.
Edit
You'll also need to update your __repr__ so that it properly handles unicode.
def __repr__(self):
return self.name.decode('utf-8')
or whatever encoding you want to use.
In general, you'll need to make sure you handle encoding from and decoding to unicode. I can't urge you enough to consider using a more recent version of Python. One of the largest changes in Python 3 addresses this very issue.