Rails + Paperclip - Update/Edit multiple images

问题

I'm building a Rails app to store products, so a product has_many images. I can upload up to 4 images when I create a New record, this is the New Action in Products controller:

def new
    @product = Product.new
    4.times { @product.images.build }
end

And this is the view:

<%= form_for @product, :html => {:multipart => true} do |f| %>
    .
    .
    .
    .    
    <%= f.fields_for :images do |builder| %>

        <% if builder.object.new_record? %>
        <p>
            <%= builder.label :image, "Image File" %>
            <%= builder.file_field :image %>
        </p>

        <% end %>

    <% end %>
<% end %>

And in the Product's model I allowed nested attributes:

accepts_nested_attributes_for :images, :reject_if => lambda { |t| t['image'].nil? }

Everything is fine up to this point. My question is: How can I update the images that belongs to the product? For example: If the user creates a new record with 2 or 3 images, then the user should be able to edit the product description and its images. So far my Edit action is defined this way:

def edit
    @product = Product.find(params[:id])
end

def update
    @product = Product.find(params[:id])
    if @product.update(product_params)
       redirect_to :root
    else
       render 'edit'
    end
end

I'm using Paperclip to upload images. I tried doing the same thing I did the the New Action, but instead of updating the images, it just uploaded new ones.

EDIT:

product_params:

  def product_params
      params.require(:product).permit(:title, :info_item, :description, :price, :subcategory_id, :category_id, :images_attributes => [:image])
 end

来源：https://stackoverflow.com/questions/32441057/rails-paperclip-update-edit-multiple-images

标签

ruby-on-rails

image

paperclip