Rails unpermitted parameters files when uploading using carrierwave -

i trying upload using carrierwave facing error ..when select file , click on upload still says it can't blank , on console says unpermitted parameters files .
[upload_controller.rb]

class uploadscontroller < applicationcontroller   before_action :authenticate_user!     def index     @uploads=upload.all   end    def new     @upload=upload.new   end     def create      @upload=upload.new(params_abc)       if  @upload.save         upload.upload(params[:upload][:files])           redirect_to  @upload      else        render 'new'      end    end  private    def params_abc         params.require(:upload).permit(:title,:description)   end  end 

[upload.rb]

class upload < activerecord::base      validates :description,  presence: true     validates :title,  presence: true     validates :tageline, presence: true      mount_uploader :upload, uploaduploader       def self.upload(files)           files.each |file|             #@file_extension=file.content_type.split('/')[1]                          doc = upload.new(tageline: file )             #save method save content in database              doc.save!         end     end  end 

[uploads/new.html.erb]

<%= form_for @upload,html: { multipart: true } |f| %>     <% if @upload.errors.any? %>         <div id="errors">             <h2><%= pluralize(@upload.errors.count, "error") %> prevented post saving:</h2>             <ul>                 <% @upload.errors.full_messages.each |msg| %>                     <li><%= msg %></li>                 <% end %>             </ul>         </div>     <% end %>      <%= f.label :title %><br>     <%= f.text_field :title %><br>     <br>      <%= f.label :description %><br>     <%= f.text_field :description %><br>       <br>        <%= f.label :files %><br>     <%= f.file_field :files%><br>     <br>      <%= f.submit %> <% end %> 

[upload_migration]

class createuploads < activerecord::migration   def change     create_table :uploads |t|         t.string :title, null: false         t.string :description, null: false         t.string :tageline, null: false         t.timestamps     end   end end 

[console]

started post "/uploads" 127.0.0.1 @ 2016-02-08 14:18:54 +0530 processing uploadscontroller#create html   parameters: {"utf8"=>"✓", "authenticity_token"=>"1yars4bpwg6w5rakns/bocf24tezalqwuxeehjz04ny=", "upload"=>{"title"=>"mjkhhjkkj", "description"=>"jhhjnh", "files"=>#<actiondispatch::http::uploadedfile:0x000000053ec6c8 @tempfile=#<tempfile:/tmp/rackmultipart20160208-10624-40whhz>, @original_filename="design patterns in ruby (2007).pdf", @content_type="application/pdf", @headers="content-disposition: form-data; name=\"upload[files]\"; filename=\"design patterns in ruby (2007).pdf\"\r\ncontent-type: application/pdf\r\n">}, "commit"=>"create upload"}   user load (0.3ms)  select  `users`.* `users`  `users`.`id` = 4  order `users`.`id` asc limit 1 unpermitted parameters: files    (0.1ms)  begin    (0.1ms)  rollback   rendered uploads/new.html.erb within layouts/application (2.7ms) completed 200 ok in 86ms (views: 82.3ms | activerecord: 0.5ms) 

[tageline_uploader]

# encoding: utf-8  class tagelineuploader < carrierwave::uploader::base    # include rmagick or minimagick support:   # include carrierwave::rmagick   # include carrierwave::minimagick    # choose kind of storage use uploader:   storage :file   # storage :fog    # override directory uploaded files stored.   # sensible default uploaders meant mounted:   def store_dir     "uploadss/post/#{model.id}"     end    # provide default url default if there hasn't been file uploaded:   # def default_url   #   # rails 3.1+ asset pipeline compatibility:   #   # actioncontroller::base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))   #   #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')   # end    # process files uploaded:   # process :scale => [200, 300]   #   # def scale(width, height)   #   #   # end    # create different versions of uploaded files:   # version :thumb   #   process :resize_to_fit => [50, 50]   # end    # add white list of extensions allowed uploaded.   # images might use this:   # def extension_white_list   #   %w(jpg jpeg gif png)   # end    # override filename of uploaded files:   # avoid using model.id or version_name here, see uploader/store.rb details.   # def filename   #   "something.jpg" if original_filename   # end  end 

you should add parameter :tageline params_abc method.

def params_abc   params.require(:upload).permit(:tageline, :title, :description) end 

also need add :tageline upload field because don't have :upload field in database.

mount_uploader :tageline, uploaduploader 

no need have upload method in model upload , create new upload object per each file, remove it.

also should remove line controller:

upload.upload(params[:upload][:files]) 

and change

<%= f.label :tageline %><br> <%= f.file_field :tageline %><br> 

in view