Radio buttons for a has_many and belongs_to association

I have a has_many and belongs_to association.

class Link < ActiveRecord::Base     
  has_and_belongs_to_many :categories
  belongs_to :property
end

class Property < ActiveRecord::Base
  has_many :links
end

In the index and show I have <%= link.property.name %> and开发者_高级运维 it will show the Property that I assigned to the link with the console just fine.

I have a problem with figuring out how to show radio buttons in the _form that assign a property to the link (a drop down would work as well).

It seems everyone who has had this question before has ether a has_many :through or a HABTM relationship and I can't seem to adapt their answers.

Since each link has only one property, you probably want radio buttons (not check boxes). This should work (in your view)

<%= form_for @link do |f| %>
  <% @properties.each do |p| %>
    <%= f.radio_button :property_id, p.id %>
    <%= f.label :property_id, p.name %>
  <% end %>

  <%= f.submit %>
<% end %>

Don't forget to set @properties = Property.all in your controller.