Unique ID for DOM in Rails
Rails has many great view helpers, one of which is dom_id:
dom_id(Post.find(12)) # => "post_23"
dom_id(Post.new) # => "new_post"
You can also provide a prefix:
dom_id(Post.find(23), :edit) # => "edit_post_23"
dom_id(Post.new, :custom) # => "custom_post"
