Change update_attributes to update

app/controllers/articles_controller.rb

@@ -70,7 +70,7 @@ class ArticlesController < ApplicationController
   def update
     @article = @supplier.articles.find(params[:id])
     respond_to do |format|
-      if @article.update_attributes(params[:article])
+      if @article.update(params[:article])
         flash[:notice] = 'Article was successfully updated.'
         format.html { redirect_to supplier_article_url(@article.supplier, @article) }
         format.xml  { head :ok }

app/controllers/suppliers_controller.rb

@@ -64,7 +64,7 @@ class SuppliersController < ApplicationController
       # don't set password to blank on saving
       attrs = attrs.reject {|k,v| k == 'ftp_password' } if attrs[:ftp_password].blank?
 
-      if @supplier.update_attributes(attrs)
+      if @supplier.update(attrs)
         flash[:notice] = 'Supplier was successfully updated.'
         format.html { redirect_to supplier_url(@supplier) }
         format.xml  { head :ok }

app/models/supplier.rb

@@ -92,7 +92,7 @@ class Supplier < ActiveRecord::Base
 
       # update existing article
       elsif status.nil? && article
-        updated_counter += 1 if article.update_attributes(parsed_article)
+        updated_counter += 1 if article.update(parsed_article)
         listed << article.id
 
       # delete outlisted article

db/migrate/20170901200146_add_salt_to_suppliers.rb

@@ -7,7 +7,7 @@ class AddSaltToSuppliers < ActiveRecord::Migration
 
     Supplier.find_each do |supplier|
       salt = [Array.new(6){rand(256).chr}.join].pack("m").chomp
-      supplier.update_attributes! salt: salt
+      supplier.update! salt: salt
     end
 
     change_column_null :suppliers, :salt, false