Rails Paperclip - Duplicating the attachment file name in another field - ruby

Question

I've got the following table:
create_table "documents", force: true do |t|
t.string "title"
t.integer "subject_id"
t.datetime "created_at"
t.datetime "updated_at"
t.string "attachment_file_name"
t.string "attachment_content_type"
t.integer "attachment_file_size"
t.datetime "attachment_updated_at"
end
Whenever I upload a file (using Paperclip), I want to duplicate the param of 'attachment_file_name' to 'title'.
This app is an API, but I'm using a debugs_controller to test it.
DebugsController
class DebugsController < ApplicationController
def index
#document = Document.new
#documents = Document.all
#subject = Subject.new
end
end
debugs/index.html.erb
<form action="http://0.0.0.0:3000/documents" method="POST" enctype="multipart/form-data">
<input name="document[title]" type="text" placeholder="doc naam">
<input name='document[attachment]' type="file">
<input name="document[subject_id]" type="text" placeholder="Subject id">
<input type="submit">
</form>
DocumentsController
class DocumentsController < ApplicationController
before_action :set_document, only: [:show, :update, :destroy]
skip_before_action :verify_authenticity_token
respond_to :json
def index
#documents = Document.all
end
def new
#document = Document.new
#documents = Document.all
end
def show
end
def create
#document = Document.new(document_params)
#document.title = params[:attachment].original_filename
if #document.save
respond_with(#document, status: :created)
else
respond_with(#document, status: 403)
end
end
def update
if #document.update(document_params)
respond_with(#document)
else
respond_with(#document.errors, status: :unprocessable_entity)
end
end
def destroy
#document.destroy
respond_with(#document, status: :destroyed)
end
private
def set_document
#document = Document.find(params[:id])
end
def document_params
params.require(:document).permit(:title, :attachment, :subject_id)
end
end
Document.rb
class Document < ActiveRecord::Base
belongs_to :subject
has_many :notes
has_attached_file :attachment, url: '/system/:attachment/:id_partition/:basename.:extension'
validates_attachment :attachment, presence: {
message: 'You have to upload a file!' }, content_type: {
content_type: %w( application/pdf ), message: 'PDF files only.' }, size: {
in: 0..10.megabytes, message: 'The maximum file-size is 10MB.' }
validates :subject_id, presence: { message: 'Assign your document to a case!' }
end
This outputs 'undefined method `original_filename' for nil:NilClass' for me.
Params:
{"document"=>{"title"=>"",
"attachment"=>#<ActionDispatch::Http::UploadedFile:0x007fbcea87c518 #tempfile=#<Tempfile:/var/folders/sy/9v_t59x974qg_m2nvmcyvkjr0000gn/T/RackMultipart20141202-14285-z5aj46>,
#original_filename="Teamsweet.pdf",
#content_type="application/pdf",
#headers="Content-Disposition: form-data; name=\"document[attachment]\"; filename=\"Teamsweet.pdf\"\r\nContent-Type: application/pdf\r\n">,
"subject_id"=>"1"},
"format"=>:json}
Does anyone know how I can duplicate the contents of the 'attachment_file_name' to the 'title' field of Documents? Also; is it possible to remove the extention of the uploaded file in the process of duplicating the file name?

Answer 1

You can do that in the model instead of in the controller.
class Document < ActiveRecord::Base
before_save :set_title
def set_title
self.title = self.attachment_file_name
end
...
end