Join the social network of Tech Nerds, increase skill rank, get work, manage projects...
 
  • How to create an app to upload resume or doc file in rails?

    • 0
    • 0
    • 0
    • 0
    • 0
    • 0
    • 3
    • 0
    • 1.00k
    Comment on it

    Lets suppose , we need an application which able to upload a file(i.e. pdf, doc, htm, html, docx) and user can delete it form the list in rails. So here we will use 'carrierwave' to upload file and for styling the pages use 'bootstrap-sass' gem. To develop this app in rails, there are the some steps given as below...

    Download App

     

    Step1: Create new application
    Step2: Add gem in Gemfile
    Step3: Bundle install
    Step4: Change db configuration if required
    Step5: Create a model for upload a doc


    Step6: Create a controller with actions like new, create, destroy
    Step7: Create an uploader using  carrierwave gem
    Step8: Call uploader in model
    Step9: Modify route regarding to root and resources
    Step10: Add bootstrap to style our web pages
    Step11: Modify the views pages like index, new to deploy style of bootstrap

     

    Now we are explaining all the steps one by one

     

    Step1: Create new application

    Run command to create new app

    rails new my_profile

     

    and go to my_profile app by run below command

    cd my_profile

     

    Step2: Add gem in Gemfile

    Path: my_profile/Gemfile

    gem 'carrierwave', '~> 0.9'
    gem 'bootstrap-sass', '~> 2.3.2'
    #gem 'sqlite3'
    gem 'mysql2' #here we are using mysql so we added mysql gem

     

    Step3: Install bundle

    Run command to bundle install

    bundle install

     

    Step4: Change db configuration if required

    As we know that we are using mysql database in this app, so there is need to change in database.yml

    Path: my_profile/config/database.yml

    default: &default
      adapter: mysql2
      username: root #your mysql username
      password: root #your mysql password
      pool: 5
      timeout: 5000
    
    development:
      <<: *default
      database: dev_profile
    
    # Warning: The database defined as "test" will be erased and
    # re-generated from your development database when you run "rake".
    # Do not set this db to the same as development or production.
    test:
      <<: *default
      database: test_profile
    
    production:
      <<: *default
      database: prod_profile

     

    And run below command to create database

    rake db:create

     

    Step5: Create a model for upload a doc

    Here we'll create a model named as Doc to upload a doc file and to cerate Doc model run bellow command

    rails g model Doc title:string attachment:string

     

    Here title: is a column_name in db table docs to store the doc title and attachment: is an other column_name in db table docs to store the uploaded file name

    now run below migration command to create table in db

    rake db:migrate

     

    Step6: Create a controller with actions like new, create, destroy

    In our application, we need only upload/creation of new doc, listing and delete action for uploaded doc. So we'll create a controller with actions index, new, create and destroy and also create its views

    To create controller use the below command

    rails g controller Docs index new create destroy

     

    Lets modifying controller according to our requirement

    class DocsController < ApplicationController
      def index
        @docs = Doc.all
      end
    
      def new
        @doc = Doc.new
      end
    
      def create
        @doc = Doc.new(resume_params)
    
        if @doc.save
          redirect_to docs_path, notice: "The doc #{@doc.title} has been uploaded."
        else
          render "new"
        end
      end
    
      def destroy
        @doc = Doc.find(params[:id])
        @doc.destroy
        redirect_to docs_path, notice:  "The docs #{@doc.title} has been deleted."
      end
    
    private
      def resume_params
        params.require(:doc).permit(:title, :attachment)
      end
      
    end
    

     

    Finally, we have created a model-views-controller for the Doc and now we'll implement the 'carrierwave' gem to upload the doc file into application.

     

    Step7: Create an uploader using  carrierwave gem

    To create an uploader using 'carrierwave' gem run below command

    rails g uploader attachment

    Here attachment is table column name in above command and also will create a file attachment_uploader.rb file in app/uploader that is my_profile/app/uploaders/attachment_uploader.rb

     

    Now we need to change according to our requirement and modified file looks like...

    Path: my_profile/app/uploaders/attachment_uploader.rb

    class AttachmentUploader < CarrierWave::Uploader::Base
    storage :file
    
      def store_dir
        "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
      end
    
      def extension_white_list
        %w(pdf doc htm html docx xlsx)
      end
    end

    In this file we can white list extension of the document. For example we can restrict a pdf file to upload. For this remove the pdf from extension_white_list method, i.e

    def extension_white_list
        %w(doc htm html docx xlsx)
      end

     

    Step8: Call uploader in model

    To call the 'carrierwave' gem uploader, modify the mode doc.rb as below..

     

    Path: my_profile/app/models/doc.rb

    class Doc < ActiveRecord::Base 
      mount_uploader :attachment, AttachmentUploader 
      validates :title, presence: true
    end

     

    This line "mount_uploader :attachment, AttachmentUploader" tells to rails to use the carrierwave gem uploader for doc.rb model

     

    Step9: Modify route regarding to root and resources like below..

    Rails.application.routes.draw do
      resources :docs, only: [:index, :new, :create, :destroy]
      root "docs#index"
    end

     

    Step10: Add bootstrap to style our web pages

    To add bootstrap styling in app add below line of code into docs.scss

     

    Path: my_profile/app/assets/stylesheets/docs.scss

    @import "bootstrap";

     

    Step11: Modify the views pages like index, new to deploy style of bootstrap and functionality

    The modified code of the files given below...

     

    Path: my_profile/app/views/layouts/application.html.erb

    <!DOCTYPE html>
    <html>
    <head>
      <title>MyProfile</title>
      <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
      <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
      <%= csrf_meta_tags %>
    </head>
    <body>
    <div class="container" style="padding-top:20px;">
    <%= yield %>
    </div>
    </body>
    </html>

     

     

    Path: my_profile/app/views/docs/index.html.erb

    <% if !flash[:notice].blank? %>
      <div class="alert alert-info">
      <%= flash[:notice] %>
      </div>
    <% end %>
    <br />
    <%= link_to "New Doccument", new_doc_path, class: "btn btn-primary" %>
    <br />
    <br />
    <table class="table table-bordered table-striped">
      <thead>
        <tr>
          <th>Ttile</th>
          <th>Download Here</th>
          <th>Action</th>
        </tr>
      </thead>
      <tbody>
        <% @docs.each do |doc| %>
          <tr>
            <td><%= doc.title %></td>
            <td><%= link_to "Download Doc", doc.attachment_url %></td>
            <td><%= button_to "Delete",  doc, method: :delete, class: "btn btn-danger", data: { confirm: "Are you sure that you wish to delete #{doc.title}?" } %></td>
          </tr>
        <% end %>
      </tbody>
    </table>

    Finally, run application by 'rails s' command and we are able to add new document, delete one and view the document list. Some screen-shots given below...

     

    You can also download app on click here

    How to create an app to upload resume or doc file in rails?

 0 Comment(s)

Sign In
                           OR                           
                           OR                           
Register

Sign up using

                           OR                           
Forgot Password
Fill out the form below and instructions to reset your password will be emailed to you:
Reset Password
Fill out the form below and reset your password: