Hi all,
I've done the svn tutorial as suggested + gone through the
datamapping / advanced data mapping 3x each.
I seem to be ok on the SELECTs with sqlalchemy, but still having
trouble with the writes.
Specifically I keep running into a wall on this one issue:
Going back to my example, again its simple, I just can't figure this
out based on the docs ( it thought it would have been similar to
http://sqlalchemy.org/docs/datamapping.myt#datamapping_onetoone or
myInstance = model.Instance.mapper.select_by(
name = 'primary_email',
type = model.InstanceType.mapper.select_by( name = 'email' )
)
Trying that, I get
AttributeError: 'LazyLoader' object has no attribute 'columns'
I thought 'maybe I should try it with eager loader or property
loader?' same thing.
------
instance_type = Table('instance_type', __engine__,
Column('id', Integer, primary_key=True),
Column('name', String(255) , unique=instance_type_name_idx' ),
)
instance = Table('instance', __engine__,
Column('id', Integer, primary_key=True),
Column('instance_type_id' , Integer , ForeignKey
("instance_type.id") ),
Column('name', String(255) , unique='instance_name_idx' ),
)
class Instance(object):
pass
class InstanceType(object):
pass
InstanceType.mapper = mapper( InstanceType , instance_type )
Instance.mapper = mapper( Instance , instance ,
properties = {
'type' : relation( InstanceType.mapper ) ,
}
)
----
i also tried
----
Instance.mapper = mapper( Instance , instance ,
properties = {
'type' : relation( mapper(InstanceType , instance_type ) ),
}
)
----------
If anyone can make a suggestion, I'd be grateful.
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