ruby on rails - How to show select menu for two models? -

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i'm using simple form , don't how show values of 2 associations.

a price can belong service or product not both @ same time.

price  # service_id, product_id  belongs_to :services # service.name  belongs_to :products # product.name end

instead having simple form this:

<%= f.association :product, :input_html => { :class => "span5 } %> <%= f.association :service, :input_html => { :class => "span5 } %>

i want turn 1 field instead.

what way simple_form_for?

what regular form_for?

i think better way use polymorphic association.

class price     belongs_to :pricable, polymorphic: true end  class product     has_one :price, as: :priceable end  class service     has_one :price, as: :priceable end

then, in form, can use: 

<%= form_for [@priceable, price.new]

where @priceable product or service.


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