I knew I can do that (last example, I made a bad copy/paste of arguments :))
Item.where(parent: parent.id).delete_all But I hoped we can use associations, which offering a better *readability*. In Rails 3, you can simply make : parent.items.delete_all Otherwise, I already use :dependent option (with :delete_all, in my case). As, It's not the point here, I tried to keep my example simple. Le jeudi 8 août 2013 15:12:51 UTC+2, Ruby-Forum.com User a écrit : > > Savater Sebastien wrote in post #1118021: > > class Parent < ActiveRecord::Base > > has_many :items > > end > > > > class Item < ActiveRecord::Base > > belongs_to :parent > > end > > > > I need to delete all items associated to one parent, without callback. > > I don't need to call #destroy, but only executing the appropriate SQL > > statement. > > > > First case : > > > >> parent.items.delete_all > > ... > > So.. What's the proper way ? > > If I understand correctly your intent is to delete all "items" > associated to "parent" but not delete the "parent" itself. If that > assumption is correct you don't have to use the association at all. Just > delete what you want directly from the Item model as follows: > > Item.delete_all([ "parent_id = ?", parent.id ]) > or > Item.where([ "parent_id = ?", parent.id ]).delete_all > > I would also recommend using the :dependent option on your association. > It makes no sense for "items" to exist without their owning "parent" > object. In other words, parent "owns" its items. > > class Parent < ActiveRecord::Base > has_many :items, :dependent => :destroy > end > > This way you won't orphan items if a parent were to be destroyed. > > -- > 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 unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/ee9abe82-d253-471e-8454-97944e22f7bb%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
