ROHIT YADAV

I want to be able to preview a file (image) before it is uploaded. The preview action should be executed all in the browser without using Ajax to upload the image. Please take a look at the sample JS code below:
function readURL(input) {

    if (input.files && input.files[0]) {
        var reader = new FileReader();

        reader.onload = function (e) {
            $('#blah').attr('src', e.target.result);
        }

        reader.readAsDataURL(input.files[0]);
    }
}

$("#imgInp").change(function(){
    readURL(this);
}); and the associated HTML:
<form id="form1" runat="server">
    <input type='file' id="imgInp" />
    <img id="blah" src="#" alt="your image" />
</form>

When we deploy the project using capistrano , So we want to run the whenever scheduler after deploying the project . So we can follow simple below steps:-

In our capfile :-

require "whenever/capistrano"

Deploy.rb:-

namespace :deploy do
  desc "Update crontab with whenever"
  task :update_cron do
    on roles(:app) do
      within current_path do
        execute :bundle, :exec, "whenever --update-crontab #{fetch(:application)}"
      end
    end
  end
  after :finishing, 'deploy:update_cron'
end

WE CAN REFER :-

http://www.lugolabs.com/articles/14-schedule-rails-tasks-with-whenever-and-capistrano

Progress Bar in Rails Delayed Jobs :- I am giving you some steps for showing the Jobs Progress Bar without reloading the page :- route.rbmap.resources :jobs, :member=>{:job_status => :get}

Controller :-

class JobsController < InheritedResources::Base
    def job_status
    @job = Delayed::Job.find(params[:id])
    respond_to do |format|
      format.json do
        render :json => @job
      end
    end
  end
end Add new field in Delayed job file :-class Addtofielddelayedjob < ActiveRecord::Migration
  def self.up
      add_column :delayed_jobs, :max_job, :string, :default => ''
    add_column :delayed_jobs, :current_job, :string, :default => ''
    add_column :delayed_jobs, :job_status, :string
  end

  def self.down
      remove_column :delayed_jobs, :max_job
    remove_column :delayed_jobs, :current_job
    remove_column :delayed_jobs, :job_status
  end
end

Library file :-class NewJob
    def perform
        datas.each_with_index do |data, index|
            content....…