Arvind Kushwah Web Developer and Software Consultant

Add gem "fog" Create rake file lib/tasks/db.rake namespace :db do   desc "Backs up heroku database and saved on AWS s3."   task import_from_heroku: [ :environment, :create ] do     HEROKU_APP_NAME = 'appname' # Change this if app name is not picked up by `heroku` git remote.     dump_filename = "appname_prod_#{Time.now.strftime('%d-%m-%Y')}"     c = Rails.configuration.database_configuration[Rails.env]     heroku_app_flag = HEROKU_APP_NAME ? " --app #{HEROKU_APP_NAME}" : nil     Bundler.with_clean_env do       puts "[1/4] Capturing backup on Heroku"       `heroku pg:backups capture DATABASE_URL#{heroku_app_flag}`       puts "[2/4] Downloading backup onto disk"       `curl -o tmp/#{dump_filename}.dump \`heroku pg:backups public-url #{heroku_app_flag} | cat\``       puts "[3/4] Mounting backup on local database"       # `pg_...

1. Get parent objects: Alert.joins("LEFT JOIN alert_events on alert_events.alert_id =  alerts.id   ").group(' alerts.id ').select(' alerts.*') 2. Get Child Object: AlertEvent.joins("INNER JOIN alerts on  alerts.id  = alert_events.alert_id  ").group(' alert_events.id ').se lect('alert_events.*') Active record for child object AlertEvent.joins(:alert).where (alerts: {category: 'Pay'}) 3. Joins multiple tables:  @previous_seafood_items = SeafoodItem.joins("LEFT JOIN auction_items on auction_items.itemable_id = seafood_items.id and auction_items.itemable_type = 'SeafoodItem' and auction_items.auction_id is NULL")     .group('seafood_items.id')     .select('seafood_items.*')     .where(user_id: current_user.id )     .paginate(:page => params[:page], :per_page => 20)

index.html.erb: <div class="row" id="wrapper"> <div class="progress-files-count"></div> <div class="progress">   <div class="progress-bar" role="progressbar" style="width: 0%;" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"><span class="progress-files-percentage">0</span></div> </div> <table class="table">   <thead>     <tr>       <th scope="col">URL</th>       <th scope="col">EMAIL</th>       <th scope="col">STATUS</th>     </tr>   </thead>   <tbody>   <% @entries.each do |entry| %>     <tr>       <td><%=link_to entry[:link], entry[:link] %></td>       <td><span id="email-<%= entry[:id]%>"></spa...

aws elasticbeanstalk update-environment --solution-stack-name "64bit Amazon Linux 2018.03 v2.8.1 running Ruby 2.3 (Puma)" --environment-name "dev-bg-123456" --region "us-east-1" Check available stacks: aws elasticbeanstalk list-available-solution-stacks { "SolutionStacks": [ "64bit Amazon Linux 2018.03 v4.16.0 running Node.js", "64bit Amazon Linux 2018.03 v2.9.11 running PHP 5.4", "64bit Amazon Linux 2018.03 v2.9.11 running PHP 5.5", "64bit Amazon Linux 2018.03 v2.9.11 running PHP 5.6", "64bit Amazon Linux 2018.03 v2.9.11 running PHP 7.0", "64bit Amazon Linux 2018.03 v2.9.11 running PHP 7.1", "64bit Amazon Linux 2018.03 v2.9.11 running PHP 7.2", "64bit Amazon Linux 2018.03 v2.9.11 running PHP 7.3", "64bit Amazon Linux 2018.03 v2.9.15 running Python 3.6", "64bit Amazon Linux 2018.03 v2.9.15 running Python 3.4", "64bit Amazon Linux 2018...

In Component: import React , { Component } from 'react' ; import './InputForm.css' ; class InputForm extends Component { constructor ( props ) { super ( props ); this . onFormSubmit = this . onFormSubmit . bind ( this ); this . validate = this . validate . bind ( this ); this . onInputChange = this . onInputChange . bind ( this ); this . state = { fields : {}, fieldErrors : {}, }; } onInputChange ( e ) { const fields = this . state . fields ; const newFields = {}; newFields [ e . target . name ] = e . target . value ; this . setState ({ fields : {... fields , ... newFields } }); } validate ( formData ) { const errors = {}; if (! formData . name || formData . name === '' || formData . name === null ) { errors . name = 'Please enter your name.' ; } return errors ; } onFormSubmit ( e ...