Hi Michael
Thanks for your thoughts and comments to date.
I can replicate the problem with ease, so perhaps this will help;
# -*- coding: utf-8 -*-
e =
create_engine('mysql+mysqlconnector://user:passw...@127.0.0.1/testdb?use_unicode=0',
encoding='utf8', echo=False)
m = MetaData(e)
t = Table('test_table', m, autoload=True)
#test_table is;
Table('test_table',
MetaData(Engine(mysql+mysqlconnector://user:passw...@127.0.0.1/testdb?use_unicode=0)),
Column(u'ID', INTEGER(display_width=11), table=<test_table>, primary_key=True,
nullable=False), Column(u'SourceType', VARCHAR(length=10), table=<test_table>),
Column(u'SourceID', VARCHAR(length=128), table=<test_table>), Column(u'Date',
DATE(), table=<test_table>), Column(u'Time', TIME(timezone=False),
table=<test_table>), Column(u'UserID', VARCHAR(length=10), table=<test_table>),
Column(u'Note', BLOB(length=None), table=<test_table>), Column(u'Division',
VARCHAR(length=3), table=<test_table>), schema=None)
# Set some row data in a dict
columns = dict(ID=1, SourceType='TEST', SourceID='WAP', Note=u'Aligot\xe9') #
The Note column is set to a unicode value for a French word with accents.
Column type is BLOB
# insert it
t.insert(values=columns).execute()
get this;
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
File "C:\Python26\lib\site-packages\sqlalchemy\sql\expression.py", line 1217,
in execute
return e._execute_clauseelement(self, multiparams, params)
File "C:\Python26\lib\site-packages\sqlalchemy\engine\base.py", line 1722, in
_execute_clauseelement
return connection._execute_clauseelement(elem, multiparams, params)
File "C:\Python26\lib\site-packages\sqlalchemy\engine\base.py", line 1235, in
_execute_clauseelement
parameters=params
File "C:\Python26\lib\site-packages\sqlalchemy\engine\base.py", line 1343, in
__create_execution_context
connection=self, **kwargs)
File "C:\Python26\lib\site-packages\sqlalchemy\engine\default.py", line 384,
in __init__
self.parameters = self.__convert_compiled_params(self.compiled_parameters)
File "C:\Python26\lib\site-packages\sqlalchemy\engine\default.py", line 513,
in __convert_compiled_params
param[key] = processors[key](compiled_params[key])
File "C:\Python26\lib\site-packages\sqlalchemy\types.py", line 1209, in
process
return DBAPIBinary(value)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 6:
ordinal not in range(128)
It appears to be in the processing of the Binary type that something is going
wrong.
Further testing showed something interesting. I changed around the data above
and set the unicode value to the VARCHAR column SourceID. That worked..
Therefore, the issue is related to storing a unicode value into a BLOB. Surely
I can store "anything" in a BLOB, or am I missing something?
Cheers
Warwick
Warwick Prince
Managing Director
mobile: +61 411 026 992
skype: warwickprince
phone: +61 7 3102 3730
fax: +61 7 3319 6734
web: www.mushroomsys.com
On 30/11/2010, at 1:29 AM, Michael Bayer wrote:
> we've got unicode round trips down very well for years now with plenty of
> tests, so would need a specific series of steps to reproduce what you're
> doing here. Note that the recommended connect string for MySQL + Mysqldb
> looks like mysql://scott:ti...@localhost/test?charset=utf8&use_unicode=0 .
>
> On Nov 29, 2010, at 2:37 AM, Warwick Prince wrote:
>
>> Hi All
>>
>> I thought I had "Character Encoding" licked, but I've hit something I can't
>> work through. Any help appreciated.
>>
>> I have a "legacy" non SQL database that I read legacy data from (using cool
>> Python code that emulates the old ISDB binary comms) and it reads a str
>> which has "Foreign" language chars in it. (French for example).
>>
>> So, firstly, I have myStr = ''Aligot\xc3\xa9" which when printed is
>> Aligoté. So far so good.
>>
>> I then convert that to unicode by myUnicode = unicode(myStr, 'utf-8',
>> errors='ignore') and get u'Aligot\xe9'. This printed is also Aligoté,
>> therefore all is good.
>>
>> I have a MySQL database, InnoDB table, charset utf-8.
>>
>> I set up my values in a dict called setValues with all the columns and their
>> respective unicode'd values ready to go
>>
>> I then do a table.insert(values=setValues).execute() and get this error.
>>
>> Traceback (most recent call last):
>> File "C:\Documents and Settings\wprince\Desktop\PY CODE
>> DEVELOPMENT\CESyncSQL\TEST_Sync.py", line 148, in SYNC_IT
>> SyncFunction(ceDB, session, meta)
>> File "C:\Documents and Settings\wprince\Desktop\PY CODE
>> DEVELOPMENT\CESyncSQL\TEST_Sync.py", line 840, in SYNC_VarietiesOUT
>> DAPDB_SetColumns(meta, 'varieties',
>> {'DescriptiveText':self.CEUnicode(tVarieties.ceVarietyText.value),
>> 'FlavourText':self.CEUnicode(tVarieties.ceFlavourText.value),
>> 'ImageURL':imageURL}, Variety=variety)
>> File "C:\Python26\lib\DAPDBHelpers.py", line 323, in DAPDB_SetColumns
>> table.insert(values=setColumns).execute()
>> File "C:\Python26\lib\site-packages\sqlalchemy\sql\expression.py", line
>> 1217, in execute
>> return e._execute_clauseelement(self, multiparams, params)
>> File "C:\Python26\lib\site-packages\sqlalchemy\engine\base.py", line 1722,
>> in _execute_clauseelement
>> return connection._execute_clauseelement(elem, multiparams, params)
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position
>> 4: ordinal not in range(128)
>>
>> I know what the error "means", I just don't know why I'm getting it. The
>> offending u'\xe9' character is in the DescriptiveText column.
>> DAPDB_SetColumns is a simple wrapper around an update/insert that builds up
>> the table.insert(values=setColumns).execute() you see.
>>
>> This is what setColumns looks like;
>> {'ImageURL': '', 'DescriptiveText': u'Carm\xe9n\xe8re is a red wine grape
>> variety originally from Bordeaux, France. Having lost favor in France, the
>> largest area planted with this variety is in now Chile. It only survived,
>> due to growers believing it was Merlot. The vines were imported into Chil',
>> 'FlavourText': u'Carmenere is a full bodied red wine with approachable
>> tannins and a combination of sweet berry fruit, savory pepper, smoke, tar,
>> with a slight leafy character.\n', 'Variety': u'Carmenere'}
>>
>> 'Variety' is the primary key BTW.
>>
>> What gives? It feels like SQLA is encoding/decoding somewhere it shouldn't..
>>
>> Cheers
>> Warwick
>>
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