Rails: has_many check in view

Question

If I have...

class Bunny < ActiveRecord::Base
  has_many :carrots
end

... how can I check in the view if it @bunnyhas carrots? I want to do something like this:

<% if @bunny.carrots? %>
  <strong>Yay! Carrots!</strong>
  <% for carrot in @bunny.carrots %>
    You got a <%=h carrot.color %> carrot!<br />
  <% end %>
<% end %>

I know what @bunny.carrots?doesn't work - what would it be?

Answer 1

<% if @bunny.carrots.any? %>
  <strong>Yay! Carrots!</strong>
  <% for carrot in @bunny.carrots %>
    You got a <%=h carrot.color %> carrot!<br />
  <% end %>
<% end %>

Answer 2

unless @bunny.carrots.empty? 

will also work

Answer 3

or:

  if @bunny.carrots.length>0

or

unless @bunny.carrots.nil? || @bunny.carrots.length>0

or

  if @bunny.carrots.any?

by the way, you will find more collection operations if you use irb or script / console with the requirement "irb / completion"

Answer 4

@bunny.carrotsis an array, so you can consider it as such by calling the array methods on it, for example.unless @bunny.carrots.empty?