On Nov 3, 2011, at 6:03 PM, Kent wrote: > There are certain properties that lazy=False or 'joined' makes some > sense. But sometimes you don't want to load relationships. In those > cases query.enable_eagerloads(False) is very useful. > > However, often you do want to load *some* relationships, but the rest > you want "turned off" without having to enumerate them manually. You > can't use enable_eagerloads(False) because there are a couple you want > to specify. > > Have you considered a public query API for what is similar to the > framework's query._only_load_props, except that it would work off just > relationship properties (and leave column properties alone)? > > I've come across this several times now and I find it awkward to need > to enumerate all the joined_loads and turn them off manually with > query.options(lazyload()). Suggestions? >
I leave lazy=True in almost all cases, except for some that i use subqueryload, then use options(whatever) to "joinedload" whatever i want to load that way. But I only use joinedload for many-to-ones, which in an equal number of cases I'm already joining to via join(), in which case I use contains_eager(). So there's virtually no case i want joinedload() on by default. joins are expensive when there's too many of them, so these days I never want to specify joinedload() in any other way other than within options(). that said, if there's a set of six different relationships you like to joinedload() a lot, you can build a function that just spits them out....query.options(*standard_joined_loads().minus(i_dont_want_these)) type of thing....I've used that approach for setting up caching options in the past. > Thanks, > Kent > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalchemy@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
