After change (delete 'version' attribute):
ProgrammingError: (ProgrammingError) (1064, "You have an error in your
SQL syntax; check the manual that corresponds to your MySQL server
version for the right syntax to use near 'AND' at line 3") u'SELECT
engines.id AS engines_id, engines.min_version_id AS
engines_min_version_id, engines.max_version_id AS
engines_max_version_id, engines.type_id AS engines_type_id \nFROM
engines LEFT OUTER JOIN versions ON engines.min_version_id =
versions.id \nWHERE %s BETWEEN AND ' ['7.0.1.4']
On 22 Maj, 21:40, "Michael Bayer" <mike...@zzzcomputing.com> wrote:
> Engine.min_version and max_version are instrumented column attributes.
> they don't have an attribute called "version". i think you want
> between(x, Engine.min_version, Engine.max_version).
>
> sniipe wrote:
>
> > Ok It's working but I can't use 'between':
>
> > engine = meta.Session.query(Engine).outerjoin((Version,
> > Engine.min_version_id==Version.id)).filter(between(request.POST
> > ['version'], Engine.min_version.version,
> > Engine.max_version.version)).all()
>
> > and I've got error:
>
> > AttributeError: Neither 'InstrumentedAttribute' object nor
> > 'Comparator' object has an attribute 'version'
>
> > What am I doing wrong?
>
> > On 22 Maj, 17:59, "Michael Bayer" <mike...@zzzcomputing.com> wrote:
> >> sniipe wrote:
>
> >> > Hi :)
>
> >> > I have three tables:
>
> >> > 1)
> >> > t_version = sa.Table("versions", meta.metadata,
> >> > sa.Column("id", sa.types.Integer(), primary_key=True,
> >> > autoincrement=True),
> >> > sa.Column("version", mysql.MSChar(length=100,
> >> > collation='utf8_polish_ci'), nullable=False, unique=True)
> >> > )
>
> >> > class Version(object):
> >> > pass
>
> >> > orm.mapper(Version, t_version)
>
> >> > 2)
> >> > t_type = sa.Table("types",
> >> > meta.metadata,
> >> > sa.Column("id", sa.types.Integer(), primary_key=True,
> >> > autoincrement=True),
> >> > sa.Column("name", mysql.MSChar(length=100,
> >> > collation='utf8_polish_ci'), nullable=False, unique=True),
> >> > )
>
> >> > class Type(object):
> >> > pass
>
> >> > orm.mapper(Type, t_type, properties = {
> >> > 'engine' : orm.relation(Engine, uselist=False,
> >> > backref='Type_Engine')
> >> > })
>
> >> > 3)
> >> > t_engine = sa.Table("engines", meta.metadata,
> >> > sa.Column("id", sa.types.Integer(), primary_key=True,
> >> > autoincrement=True),
> >> > sa.Column("min_version_id", sa.types.Integer(), sa.ForeignKey
> >> > ("versions.id"), nullable=False),
> >> > sa.Column("max_version_id", sa.types.Integer(), sa.ForeignKey
> >> > ("versions.id"), nullable=False),
> >> > sa.Column("type_id", sa.types.Integer(), sa.ForeignKey
> >> > ("types.id"), nullable=False),
> >> > )
>
> >> > class Engine(object):
> >> > pass
>
> >> > orm.mapper(Engine, t_engine, properties = {
> >> > 'type' : orm.relation(Type, uselist=False, backref='Engine_Type'),
> >> > 'min_version' : orm.relation(Version,
> >> > primaryjoin=t_engine.c.min_version_id==t_version.c.id),
> >> > 'max_version' : orm.relation(Version,
> >> > primaryjoin=t_engine.c.max_version_id==t_version.c.id)
> >> > })
>
> >> > My problem is how to make query equal this SQL instruction "select
> >> > e.id, e.type_id, tv.version as min_version, tv2.version as max_version
> >> > from engines e join versions tv on(e.min_version_id=tv.id) join
> >> > versions tv2 on(e.max_version_id=tv2.id) where '7.0.1.32' between
> >> > tv.version and tv2.version;"
>
> >> > I've tried to do something like that:
>
> >> > engine = meta.Session.query(Engine).outerjoin(Version).filter(between
> >> > (request.POST['version'], Engine.min_version.version,
> >> > Engine.max_version.version)).all()
>
> >> when you do the outerjoin, pass it the relation you're joining on or an
> >> onclause, such as
>
> >> query.outerjoin(Version.engine)
>
> >> or
>
> >> query.outerjoin((Version, Engine.some_col==Version.some_other_col))
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