On Feb 19, 2014, at 1:28 PM, a...@bitcredits.io wrote: > Hi there, > > I've been hitting an intermittent bug with SQLAlchemy/PostgreSQL using an > HSTORE column. Some times, when I restart my process (pyramid over gevent > over chaussette), I get a spew of such errors... some other time, everything > goes just fine. > > It seems this bug hasn't been documented anywhere, or at least the error I > get wasn't reported. > > If you guys have any insight at all that would help me out in my search for > the bug, I'd be eternally grateful. Here is the traceback:
if you’re on 0.8.4 or any 0.9, there is a bug fix going out today that is very likely part of this, has to do with the engine determining if HSTORE support is turned on. Assuming this is your issue, a workaround would be: eng = create_engine(…) conn = eng.connect() conn.close() before any other use of that engine occurs. this will ensure that the correct info about HSTORE is determined up front. > > File "/home/abourget/build/bitc/Bitc/bitc/api.py", line 126, in > website_from_origin > website = Website.get_by_host(origin) > File "/home/abourget/build/bitc/Bitc/bitc/models.py", line 299, in > get_by_host > Website.deleted == False).first() > File > "/home/abourget/build/bitc/env/local/lib/python2.7/site-packages/sqlalchemy/orm/query.py", > line 2320, in first > ret = list(self[0:1]) > File > "/home/abourget/build/bitc/env/local/lib/python2.7/site-packages/sqlalchemy/orm/query.py", > line 2187, in __getitem__ > return list(res) > File > "/home/abourget/build/bitc/env/local/lib/python2.7/site-packages/sqlalchemy/orm/loading.py", > line 72, in instances > rows = [process[0](row, None) for row in fetch] > File > "/home/abourget/build/bitc/env/local/lib/python2.7/site-packages/sqlalchemy/orm/loading.py", > line 451, in _instance > populate_state(state, dict_, row, isnew, only_load_props) > File > "/home/abourget/build/bitc/env/local/lib/python2.7/site-packages/sqlalchemy/orm/loading.py", > line 305, in populate_state > populator(state, dict_, row) > File > "/home/abourget/build/bitc/env/local/lib/python2.7/site-packages/sqlalchemy/orm/strategies.py", > line 154, in fetch_col > dict_[key] = row[col] > File > "/home/abourget/build/bitc/env/local/lib/python2.7/site-packages/sqlalchemy/dialects/postgresql/hstore.py", > line 291, in process > return _parse_hstore(value.decode(encoding)) > AttributeError: 'dict' object has no attribute 'decode' > > Just for little context, models.py:299 in full is: > website = db.query(Website).filter(Website.domain == host, > Website.deleted == False).first() > > There is one field on Website, declared as such: > > data_apis = Column(MutableDict.as_mutable(HSTORE), default=dict) > > perhaps that last default=dict would induce such a problem ? I'll try > investigating that path. > > thanks for any help! > > Alexandre > > > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+unsubscr...@googlegroups.com. > To post to this group, send email to sqlalchemy@googlegroups.com. > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/groups/opt_out.
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