#165 Edit Multiple

map.resources :products, :collection => { :edit_multiple => :post, :update_multiple => :put }

def edit_multiple
  @products = Product.find(params[:product_ids])
end

def update_multiple
  @products = Product.find(params[:product_ids])
  @products.each do |product|
    product.update_attributes!(params[:product].reject { |k,v| v.blank? })
  end
  flash[:notice] = "Updated products!"
  redirect_to products_path
end

def price_modification
  price
end

def price_modification=(new_price)
  if new_price.to_s.ends_with? "%"
    self.price += (price * (new_price.to_f/100)).round(2)
  else
    self.price = new_price
  end
end

<% form_tag edit_multiple_products_path do %>
<table>
  <tr>
    <th></th>
    <th>Name</th>
    <th>Category</th>
    <th>Price</th>
  </tr>
<% for product in @products %>
  <tr>
    <td><%= check_box_tag "product_ids[]", product.id %></td>
    <td><%=h product.name %></td>
    <td><%=h product.category.name %></td>
    <td><%= number_to_currency product.price %></td>
    <td><%= link_to "Edit", edit_product_path(product) %></td>
    <td><%= link_to "Destroy", product, :confirm => 'Are you sure?', :method => :delete %></td>
  </tr>
<% end %>
</table>
<%= submit_tag "Edit Checked" %>
<% end %>

<% form_for :product, :url => update_multiple_products_path, :html => { :method => :put } do |f| %>
  <ul>
    <% for product in @products %>
      <li>
        <%= hidden_field_tag "product_ids[]", product.id %>
        <%=h product.name %>
      </li>
    <% end %>
  </ul>
  <p>
    <%= f.label :category_id %><br />
    <%= f.collection_select :category_id, Category.all, :id, :name, :include_blank => true %>
  </p>
  <p>
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </p>
  <p>
    <%= f.label :price_modification %><br />
    <%= f.text_field :price_modification %>
  </p>
  <p>
    <%= f.label :discontinued %><br />
    <%= f.select :discontinued, [["Yes", true], ["No", false]], :include_blank => true %>
  </p>
  <p><%= f.submit "Submit" %></p>
<% end %>