On Wed, Feb 16, 2011 at 10:15 PM, Ernie Miller <er...@metautonomo.us> wrote: >> (off topic: this discussion is good to see, as I will be taking it into >> account on the metawhere rewrite) > > So, since this thread and another are currently ongoing relating to complex > queries and the handling of ARel predicates, I thought I'd make a quick > announcement that the MetaWhere rewrite-in-progress for Rails 3.1 is up on > GitHub and actively being worked on: > https://github.com/ernie/meta_where/tree/rewrite > Specifically as a result of this thread, I've made core extensions opt-in, > and am adding block syntax for those Relation methods where it makes sense. > Hopefully this will alleviate some of the Symbol extension gripes that came > up here. For example: > > SQL Functions: > Person.select{max(id).as(max_id)} > => SELECT max("people"."id") AS 'max_id' FROM "people" > > ANDs and association mapping: > Person.joins(:comments). > where{name >> 'bob' & {comments => body >> 'First post!'}} > => SELECT "people".* FROM "people" > INNER JOIN "comments" ON "comments"."person_id" = "people"."id" > WHERE (("people"."name" = 'bob' AND "comments"."body" = 'First post!')) > The same query with an OR: > Person.joins(:comments). > where{name >> 'bob' | {comments => body >> 'First post!'}} > => SELECT "people".* FROM "people" > INNER JOIN "comments" ON "comments"."person_id" = "people"."id" > WHERE (("people"."name" = 'bob' OR "comments"."body" = 'First post!')) > > Could also be written as: > Person.joins(:comments). > where{name.eq('bob') | {comments => body.eq('First post!')}} > You get the idea. I'm still tweaking the operators, not so sure about >> for > eq.
The >> definitely weirds me out. I haven't looked at the source, but why aren't you overriding ==? (a link to rtfm is fine, I'm just lazy :)) > Anyway, this is the last MetaWhere-related post I'll make -- I just thought > it might give a plugin option to those people who are looking for a way to > get at the ARel goodness in AR and don't want to wait on something in core. > -Ernie > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Core" group. > To post to this group, send email to rubyonrails-core@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-core+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-core?hl=en. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. To post to this group, send email to rubyonrails-core@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-core+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-core?hl=en.
