On Nov 12, 2008, at 12:14 PM, Steve Howe wrote:
>
> Hello all,
>
> I'm having trouble using SQLAlchemy 0.50.rc3 and "like" query
> filters with the
> psycopg2 adapter:
>
> class Activity(Base):
> __tablename__ = 'activities'
> id = Column(Integer, primary_key=True, autoincrement=True)
> name = Column(Unicode(100), index=True)
>
> [...]
> filter_name = 'john';
> activities = db_session.query(model.Activity)
> activities = activities.filter(model.Activity.name.like('%%' +
> filter_name +
> '%%'))
>
> The query run from the above statements does not get expanded by the
> adapter:
>
> SELECT activities.id AS activities_id, activities.name AS
> activities_name
> FROM activities
> WHERE activities.name LIKE %(name_1)s
the bind parameter %(name_1)s is being populated with the value of '%
%' + filter_name + '%%'. This should be all you need.
> This syntax:
>
> activities = activities.filter("name ~~ '%%%s%%'" % filter_name) )
>
> ... will produce a valid SQL:
>
> SELECT activities.id AS activities_id, activities.name AS
> activities_name
> FROM activities
> WHERE name ~~ '%john%'
>
> However, it raises this error:
>
> [...]
> self.dialect.do_execute(cursor, statement, parameters,
> context=context)
> File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.5.0rc3-
> py2.5.egg/sqlalchemy/engine/default.py", line 122, in do_execute
> cursor.execute(statement, parameters)
> TypeError: 'dict' object is unindexable
>
> I'm stuck. What should I be doing ? Use another syntax ? Replace
> psycopg2's
> paramstyle to non-escaping mode ?
its not clear to me what is actually going wrong in that case. does
it work if you use a raw psycopg2 script ?
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