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HABTM checkboxes

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The right and fastest way to have a HABTM checkboxes, railscast #17

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  1. <% for category in Category.find(:all) %>
  2. <div>
  3.   <%= check_box_tag "product[category_ids][]", category.id   
  4.                     @product.categories.include?(category) %>
  5. </div>
  6. <% end %>

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