How do I convert an ActiveRecord result array to a normal array?

Question

How do I convert the resultset of @recipe.components.find ( [# <Component ingredient_id: 1>, # <Component> ingredient_id: 2>] ) to an array such as [1,2]

<% @ingredients.each do |ingredient| %>   <div class="field">   <%= check_box_tag 'ingredients[]', ingredient.id, @recipe.components.find(:all, :select => "ingredient_id").include?(ingredient.id) %><%= ingredient.name %>   </div> <% end %> 

Thanks!

Answer 1

you can use

@result.map {|i| i.ingredient_id } 

Answer 2

If you are using a recent version of ruby, there is new way to do this:

@result.map(&:ingredient_id) 

Time saver, clean and easy to interpret.