Rick Denatale wrote: > Why not > > pages = Page.all(:include => :book)
I usually need to filter by, let's say, a certain library: @pages = Page.all( :select => 'pages.id, pages.no', :joins => :book, :conditions => "books.library_id = #{1}" ) AR will generate: SELECT pages.id, pages.no FROM "pages" INNER JOIN "books" ON "books".id = "pages".book_id WHERE (books.library_id = 1) So the join has already been done. Wouldn't :include make a redundant query? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.