Downloaded PaperClip file gives "do not delete file" when added to session

I need an uploaded PaperClip file in a multi-step form. I went through the same in the session, but it gives me " cannot upload file ".

I have the following method in my controller:

def find_shared_ids
  session[:attachment] = params[:participant_attachments][:attachment]  
  @file_title = params[:participant_attachments][:file_title]
  @attachment = ParticipantAttachment.new(activity_params)
end

      

        
        
        
      

    

Below is my model:

class ParticipantAttachment < ActiveRecord::Base
  belongs_to :participant
  has_many :shared_attachments, dependent: :destroy
  has_many :participants, through: :shared_attachments
  validates_presence_of :attachment

  has_attached_file :attachment, Paperclip::Attachment.default_options.merge(Settings.participant_attachments.paperclip)

  validates_attachment_content_type :attachment, content_type: ['image/jpeg']
end

      

        
        
        
      

    

In the browser, I get this:

Unable to upload file

Parameters:

{"utf8" => "✓", "Authenticity_token" => "d4Ck467KQqL0GOj2Y5hwrDxMI1Dcdbu6TulzmmuFPOg =", "Participant_attachments" => {"attachment" => #, @Original_filename = "150519456ty_2980 , @headers = "Content-Disposition: form-data; name = \" participant_attachments [attachment] \ "; file name = \" 1505352_796594563718005_3237802925919628295_n.jpg \ "\ r \ nContent-Type: image / jpeg \ r \ n"> , "file_title" => "refesf"}, "member_ids" => ""}

I tried to pass the same in hidden_field_tag ​​in my view file. It takes the downloaded file as a string and doesn't help.

Kindly help! :)