new.html.erb

<div class="page-header">
  <h1>Product New</h1>
</div>
  <div class="container col-md-4 col-md-offset-1">

  	<%= simple_form_for [:admin, @product],:html=> {  role: 'form' } do |f| %>
    	<p>
    	<%= f.input :title, autofocus: true, label: '商品名稱', input_html: { class: 'form-control', required: true  } %>
    	</p>
  		<p>
  		<%= f.input :description, as: :text , label: '商品描述', input_html: { class: 'form-control', required: true  } %>
    	</p>
    	<p>
    	<%= f.input :quantity,autofocus: true, label: '商品數量', input_html: { class: 'form-control', required: true  } %>
     	</p>
     	<p>
     	<%= f.input :price, autofocus: true, label: '商品價格', input_html: { class: 'form-control', required: true  } %>
     	</p>
     	<p>
        <%= f.input :image, as: :file , label: '商品圖片' %>
        </p>
        <%= f.submit "Submit", :class => "btn btn-lg btn-primary btn-block"  %>
    </div>

<% end %>