Rails nested multi file upload to amazon s3 using s3_file_field

Question

I've been trying to get multi image uploads working on a nested model in rails. I've been using the s3_file_field gem, which can be found here.

I've created a gist which shows the relevant parts of my code which is available here.

When I try to upload two images, both images are uploaded to S3, but only one Image object is saved to the database. I need to find a way to create an Image object for each image that is uploaded to S3.

Nested models and forms make me cringe. When you have that level of complexity, you should probably create a new object to handle it. Try form objects - see another answer here: http://stackoverflow.com/a/25298020/1448966 — A Fader Darkly, Aug 19 '14 at 09:28

score 0 · Answer 1 · edited May 23 '17 at 11:56

i raised a similar question here....use paperclip >= 4 along with s3 to make this work.

class Image < ActiveRecord::Base
  has_many :image_photos , :dependent => :destroy
  accepts_nested_attributes_for :image_photos, :reject_if => lambda { |a| a[:avatar].blank? }, :allow_destroy => true
end


class ImagePhoto < ActiveRecord::Base
 belongs_to :image
 has_attached_file :avatar,
  :styles => {:view => "187x260#"},
  :storage => :s3,
  :s3_permissions => :private,
  :s3_credentials => S3_CREDENTIALS
 attr_accessible :image_id,:avatar,:avatar_file_name,:avatar_content_type,:avatar_file_size,:avatar_updated_at
 validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/
 validates_presence_of :avatar
end

in controller

 def new
if current_or_guest_user.pic_categories.present?
 @image = Image.new
 #3.times {@image.image_assets.build} # added this
 @image.image_photos.build

end 

 def create
@image = Image.new(params[:image])
@image.user_id = current_or_guest_user.id
 if @image.save
   if params[:image_photos][:avatar]
     params[:image_photos][:avatar].each { |image|
       @image.image_photos.create(avatar: image)
       }
      end
@image.create_activity key: 'image.create', owner: current_or_guest_user
end

_form.html.erb

<%= form_for(@image,:html=>{:multipart => true,:remote=>true,:class=>"form-horizontal",:role=>"form"}) do |f |%>
 <%= f.fields_for :image_photos do |builder| %>
<% if builder.object.new_record? %>
   Upload picture
  <!-- to add multiple images--> 
  <%= builder.file_field :avatar,:multiple=>"true",:name=>"image_photos[avatar]  []",:class=>"opacity"%></a>
 <%end%>


<%end%>

Rails nested multi file upload to amazon s3 using s3_file_field

1 Answers1