Ok, thanks so much for your help.
On Wednesday, May 14, 2014 2:35:27 PM UTC-7, Michael Bayer wrote: > > > > there are deferred() columns that you can set on a mapper but there’s not > a mechanism right now to set deferred target attributes when the object is > loaded only from a specific relationship without the specific call within > the query(). So unless you maybe ran those options into every Query > unconditionally, or something. I’d look to see how big a deal it is to > just be explicit on this one. > > > > On May 14, 2014, at 1:39 PM, Seth <seediff...@gmail.com <javascript:>> > wrote: > > Thanks Mike, > > But...is there no way to set this behavior directly on the > "relationship()"? The whole point there is to be "lazy" ;) > > Seth > > > > On Saturday, May 10, 2014 7:59:33 PM UTC-7, Michael Bayer wrote: >> >> >> session.query(Parent).options(defaultload(“children”).load_only(“cheap_column")) >> >> or really if you want to cut out “expensive_column” >> >> >> session.query(Parent).options(defaultload(“children”).defer(“expensive_column”)) >> >> http://docs.sqlalchemy.org/en/rel_0_9/orm/mapper_config.html#deferred >> >> >> >> On May 10, 2014, at 6:39 PM, Seth <seediff...@gmail.com> wrote: >> >> Is there any way to get SQLAlchemy to only load specific columns through >> a relationship()? >> >> For example, with this scenario: >> >> class Parent(Base): >> __tablename__ = 'parent' >> id = Column(Integer, primary_key=True) >> children = relationship("Child", lazy='joined') >> >> class Child(Base): >> __tablename__ = 'child' >> id = Column(Integer, primary_key=True) >> parent_id = Column(Integer, ForeignKey('parent.id')) >> cheap_column = Column(Unicode(10)) >> expensive_column = Column(LargeBinary) >> >> I'd like Child to get lazily joined when Parent is loaded, but only with >> Child's "cheap_column" and not it's "expensive_column". >> >> Thanks, >> Seth >> >> >> -- >> 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+...@googlegroups.com. >> To post to this group, send email to sqlal...@googlegroups.com. >> Visit this group at http://groups.google.com/group/sqlalchemy. >> For more options, visit https://groups.google.com/d/optout. >> >> >> > -- > 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 tosqlalchemy+...@googlegroups.com <javascript:>. > To post to this group, send email to sqlal...@googlegroups.com<javascript:> > . > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. > > > -- 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/d/optout.
