rails paperclip mysql does not save files - ruby-on-rails

Question

The attachment resume seems to works fine, but i do not have any insert into database (null, null, null , null) and i do not have file uploaded to any folder in my app...
class AddAttachmentCvToUsers < ActiveRecord::Migration
def change
change_table :users do |t|
t.attachment :cv
end
end
end
User model :
attr_accessor :cv
validates_attachment :cv
has_attached_file :cv, :path=>":rails_root/storage/#{Rails.env}#{ENV['RAILS_TEST_NUMBER']}/."
I have also installed carrierwave but still no effects..
Edit:
User Controller (I do not have another controller for attachments) :
class UsersController < ApplicationController
def new
#users = User.new
end
def create
#user = User.new(user_params)
if #user.save
session[:user_id] = #user.id
current_user = #user.id
redirect_to '/status'
else
redirect_to '/signup'
end
end
private
def user_params
params.require(:user).permit(:first_name, :last_name, :email, :PESEL, :phone, :password,:cv)
end
end
View for new user with attachement:
<div class="login">
<div class="container">
<div class="form">
<h1>SIGN UP</h1>
<%= form_for #users,:html=> {:multipart=>true} do |f| %>
<%= f.text_field :first_name, :placeholder => "First name" %>
<%= f.text_field :last_name, :placeholder => "Last name" %>
<%= f.email_field :email, :placeholder => "Email" %>
<%= f.text_field :PESEL, :placeholder => "PESEL number" %>
<%= f.phone_field :phone, :placeholder => "Phone Number" %>
<%= f.password_field :password, :placeholder => "Password" %>
<p>CV</p>
<%= f.file_field :cv, name: "CV", class: 'form-control' %>
<%= f.submit "Sign up", class: "btn-submit" %>
<% end %>
</div>
</div>
</div>
Some logs from console:
Started POST "/users" for 127.0.0.1 at 2016-05-18 03:55:17 +0200
Processing by UsersController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"Fw6easThY51CDppDDVfqO0ProQITaltqP3DaIL3An67ey4vGXh2yEerhhhxoo3bTp/mKbkIaAmktzBviBIjg8g==", "user"=>{"first_name"=>"Test", "last_name"=>"Test", "email"=>"test#t.pl", "PESEL"=>"91020300441", "phone"=>"609123123", "password"=>"[FILTERED]"}, "CV"=>#<ActionDispatch::Http::UploadedFile:0x007f25790c1b60 #tempfile=#<Tempfile:/tmp/RackMultipart20160518-26849-rqaabr.pdf>, #original_filename="pdf-test.pdf", #content_type="application/pdf", #headers="Content-Disposition: form-data; name=\"CV\"; filename=\"pdf-test.pdf\"\r\nContent-Type: application/pdf\r\n">, "commit"=>"Sign up"}
(0.1ms) BEGIN
User Exists (1.4ms) SELECT 1 AS one FROM `users` WHERE `users`.`email` = BINARY 'test#t.pl' LIMIT 1
User Exists (0.1ms) SELECT 1 AS one FROM `users` WHERE `users`.`PESEL` = BINARY '91020300441' LIMIT 1
SQL (0.1ms) INSERT INTO `users` (`first_name`, `last_name`, `email`, `PESEL`, `phone`, `password_digest`, `created_at`, `updated_at`) VALUES ('Test', 'Test', 'test#t.pl', '91020300441', '609123123', '$2a$10$HmHAiJkHv1Tada/OpzKXKOISiwumoFKTy48tFpNBYuATq/A5GaC9G', '2016-05-18 01:55:17', '2016-05-18 01:55:17')
SQL (1.0ms) INSERT INTO `job_apps` (`user_id`, `created_at`, `updated_at`) VALUES (35, '2016-05-18 01:55:17', '2016-05-18 01:55:17')
(3.0ms) COMMIT
Redirected to http://localhost:3000/status
Completed 302 Found in 135ms (ActiveRecord: 8.2ms)
Started GET "/status" for 127.0.0.1 at 2016-05-18 03:55:17 +0200
Processing by JobAppsController#index as HTML

Answer 1

You have overridden the name attribute of the file_field, which has broken Rails naming conventions. If you remove the name attribute, Rails will be able to pass the file details uploaded in the :cv field to the database.
Change the file_field to this:
<%= f.file_field :cv, class: 'form-control' %>
If you have Javascript attached to the form, and need to refer to the file_field element, you can use this, instead:
<%= f.file_field :cv, id: "cv", class: "form-control" %>