This is a method generated for you by rails as a result of the associtions declared in the Post and Comment models - in this case belongs_to and has_many. Comments belongs to a post, and a post can have many comments.
Rails creates quite a number of theses methods in response to the association, and different associations (has_one, has_and_belongs_to_many etc.) create different sets of methods - more details in the API docs: http://edgeapi.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html collection.build is one of these methods, and the API docs explain it pretty well: "collection.build(attributes = {}, …) Returns one or more new objects of the collection type that have been instantiated with attributes and linked to this object through a foreign key, but have not yet been saved." "collection" in this case is @post.comments (None of of which has anything to do with namespaced resources...) Matt. On Aug 14, 2:23 pm, Abder-Rahman Ali <li...@ruby-forum.com> wrote: > At the following:http://edgeguides.rubyonrails.org/getting_started.html > > Under: 7.4 Generating a Controller > > It mentions the following: > > <%= form_for([...@post, @post.comments.build]) do |f| %> > > Now, this is what I know: > > form_for: used to generate a form. > @post: the object form_for is bound to. > > The part I didn't get here is: > > @post.comments.build > > What does that part provide me with? > > Thanks. > -- > Posted viahttp://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.
