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python Programming Glossary: session.queryScanning huge tables with SQLAlchemy using the ORM http://stackoverflow.com/questions/1145905/scanning-huge-tables-with-sqlalchemy-using-the-orm the resulting SQLite database session Session for p in session.query Picture print p I expected to see hashes scrolling by but instead.. this myself. Changing the code to session Session for p in session.query Picture .yield_per 5 print p loads only 5 pictures at a time...
http://stackoverflow.com/questions/1337095/sqlalchemy-inheritance both approaches # buildings that are within x 5 and y 3 session.query Building .filter Building.x 5 Building.y 3 # Residential buildings.. 3 # Residential buildings that have only 1 resident session.query Residential .filter Residential.num_residents 1 To control which..
Convert sqlalchemy row object to python dict http://stackoverflow.com/questions/1958219/convert-sqlalchemy-row-object-to-python-dict throws 'TypeError 'User' object is not iterable' for u in session.query User .all print dict u Running this code on my system outputs..
Does SQLAlchemy have an equivalent of Django's get_or_create? http://stackoverflow.com/questions/2546207/does-sqlalchemy-have-an-equivalent-of-djangos-get-or-create get_or_create_instrument session serial_number instrument session.query Instrument .filter_by serial_number serial_number .first if.. get_or_create session model defaults None kwargs instance session.query model .filter_by kwargs .first if instance return instance False..
Efficiently updating database using SQLAlchemy ORM http://stackoverflow.com/questions/270879/efficiently-updating-database-using-sqlalchemy-orm # snip creation of session object for c in session.query Stuff c.foo c.foo 1 session.flush session.commit This does the.. objects that are in your session. So if you say for c in session.query Stuff .all c.foo c.foo 1 session.commit it will do what it says.. 0.5 series you could also use this method for updating session.query Stuff .update Stuff.foo Stuff.foo 1 session.commit That will..
SQLAlchemy: selecting which columns of an object in a query http://stackoverflow.com/questions/6977658/sqlalchemy-selecting-which-columns-of-an-object-in-a-query it returns # hypothetical syntax of course for u in session.query User.columns userid name .all print u would print User 1 'bob'..
parsing excel documents with python http://stackoverflow.com/questions/7372716/parsing-excel-documents-with-python
memory-efficient built-in SqlAlchemy iterator/generator? http://stackoverflow.com/questions/7389759/memory-efficient-built-in-sqlalchemy-iterator-generator fetched bite sized chunks of the dataset for thing in session.query Things analyze thing To avoid this I find I have to build my..
SQLAlchemy - build query filter dynamically from dict http://stackoverflow.com/questions/7604967/sqlalchemy-build-query-filter-dynamically-from-dict the query dynamically based on the dict. I know I can do session.query myClass .filter_by web_dict However that only works when the.. using the __dict__ attribute for k v in web_dict.items q session.query myClass .filter myClass.__dict__ k .like ' s ' v Not sure how.. object with the result of that method call. So basically q session.query myClass for attr value in web_dict.items q q.filter getattr..
http://stackoverflow.com/questions/7942547/using-or-in-sqlalchemy OR firstname 'whitey' Should be something like addr session.query AddressBook .filter City boston .filter python sqlalchemy..
I need a sample of python unit testing sqlalchemy model with nose http://stackoverflow.com/questions/833626/i-need-a-sample-of-python-unit-testing-sqlalchemy-model-with-nose def teardown session.remove def test_something instances session.query model.SomeObj .all eq_ 0 len instances session.add model.SomeObj..
How to integrate SQLAlchemy and a subclassed Numpy.ndarray smoothly and in a pythonic way? http://stackoverflow.com/questions/8940802/how-to-integrate-sqlalchemy-and-a-subclassed-numpy-ndarray-smoothly-and-in-a-pyt ui session.add c1 session.commit # Load MyNumpy Objects c2 session.query Container .filter_by name Test Container .first # Ugly UI mn3.. session.add c1 session.commit # Load MyNumpy Objects c2 session.query Container .filter_by name Test Container .first mn3 c1.my_numpies..
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