Arvind Kushwah Web Developer and Software Consultant

bundle install --path vendor/bundle bundle package --all

rails g model member user_id:integer  invitable_id:integer invitable_type:string class Member < ActiveRecord::Base     belongs_to :user     belongs_to :invitable, polymorphic: true end User can join many communities, groups and meeting rooms, so the has many polymorphic association will look like as:- class User < ActiveRecord::Base   has_many :members, dependent: :destroy   has_many :community_members, through: :members, source: :invitable, source_type: 'Community'   has_many :group_members, through: :members, source: :invitable, source_type: 'Group'   has_many :meeting_rooms_members, through: :members, source: :invitable, source_type: 'MeetingRoom'   has_many :meeting_rooms, dependent: :destroy end

html = ' <b><a href="http://foo.com/">foo</a></b><img src="bar.jpg"> '   ActionView :: Base . full_sanitizer . sanitize ( html )

Login to the server   ssh root@IP   sudo apt-get update sudo apt-get install apache2   Again, we should give ownership of the document root to the user we are operating as: sudo chown -R `whoami`:`id -gn` /var/www/html   We need to remember to install git on this machine as well: sudo apt-get install git Now, we can create a directory within our user's home directory to hold the repository. We can then move into that directory and initialize a bare repository. A bare repository does not have a working directory and is better for servers that you will not be working with much directly: m kdir ~/proj  cd ~/proj  git init --bare   Since this is a bare repository, there is no working directory and all of the files that are located in .git in a conventional setup are in the main directory itself. We need to create another git hook. This time, we are interested in the post-receive hook, which is run on the server receiving a git push . Open this

By the looks of what you are trying to send, you need to change the Grape restriction, because destinations is an Array , not a Hash : requires : destinations , type : Array   You don't need the "destination" hash when sending the request: { destinations => [ { name => 'dest1' , other_attribute : 'value' , etc ... }, { name => 'dest2' , other_attribute : 'value' , etc ... }, { name => 'dest3' , other_attribute : 'value' , etc ... } ]}   This creates an Array of hashes. In order to send this through POSTMAN, you'll need to modify that destinations param your sending and add multiple lines in POSTMAN. Something like: destinations [][ name ] 'dest1' destinations [][ other_attribute ] 'value1' destinations [][ name ] 'dest2' destinations [][ other_attribute ] 'value2'

1- Create message model:-  rails g model message sender_id:integer recepient_id:integer body:text 2- Define Assosciation and scopes:-  class Message < ActiveRecord::Base     belongs_to :sender,      :class_name => 'User',      :foreign_key => 'sender_id'     belongs_to :recepient,      :class_name => 'User',      :foreign_key => 'recepient_id'     scope :conversations, lambda{|sender_id,recepient_id| where('sender_id = ? AND recepient_id = ? ',sender_id, recepient_id ).order("created_at DESC")}     scope :friends_conversations, lambda{|recepient_id,sender_id| where('sender_id = ? AND recepient_id = ? ',sender_id, recepient_id ).order("created_at DESC")} end 3- User model:- class User < ActiveRecord::Base  has_many :received_messages,  :class_name => 'Message',  :foreign_key => 'recepient_id'  has_many :sent_messages,  :class_name => 'Message'

Share Internet Connection With Android in Ubuntu 14.04 June 8, 2014 —  127 Comments This quick tip is going to show you how to create wifi hotspot in Ubuntu 14.04 so that you can share a wired internet connection with Android devices through your wireless card. I’ve written about this in another post using a third-party app called ap-hotspot , but some readers said that not work. The pre-installed Network Manager in Ubuntu Unity does not support Access Point (AP) mode which is required for Android devices. Fortunately, KDE’s connection editor support this mode, below is how: NOTE: To do below steps, your Wireless Card must support Access Point (AP) mode. 1. Click the link below to bring up Ubuntu Software Center and click install kde-nm-connection-editor: Click Install KDE’s Network Manager 2. Once installed, press Alt+F2 and run command to launch the app: kde-nm-connection-editor 3. Cli

sudo -u postgres psql   Postgresql to csv file:-   COPY products TO '/home/products.csv' DELIMITER ',' CSV HEADER ; CSV to Postgresql table:-   COPY products FROM '/home/products.csv' DELIMITER ',' CSV HEADER ;   products is table name.

server {         listen 80 default_server;         listen [::]:80 default_server;         # SSL configuration         #         # listen 443 ssl default_server;         # listen [::]:443 ssl default_server;         #         # Self signed certs generated by the ssl-cert package         # Don't use them in a production server!         #         #root /usr/share/nginx/html;         server_name 108.174.155.117;         passenger_enabled on;         rails_env    production;         root         /home/app/test-runner/public;          error_page   500 502 503 504  /50x.html;         #location = /50x.html {         #    root   html;         #}         # Add index.php to the list if you are using PHP         index index.html index.htm index.nginx-debian.html;         #server_name _;          #server_name _;         #location / {                 # First attempt to serve request as file, then                 # as directory, then fall back to displaying a 404.         #       try_files $uri

The way I ended up doing this was: 1) Download AWSDevTools from http://aws.amazon.com/developertools/AWS-Elastic-Beanstalk/6752709412171743 2) Move to your git repo on the CLI 3) Run /Downloads/elasticbeanstalk-cli/AWSDevTools/ [Linux or Windows] /AWSDevTools-RepositorySetup.sh EDIT: 3a) git aws.config 4) Enter AWS Access Key, AWS Secret Key, AWS Region, and enter the existing name of your AWS Application and AWS Environment. 5) Now you can git add, git commit as usual, and use git aws.push to push to your EB environment 7) You can follow the steps above to add other environments. For example if you had production and staging environments, and then use git aws.push --environment to use the same repo to push to both environments. If you come across the error The specified module 'AWSDevTools' was not loaded on Windows, this is most likely because the AWSDevTools module is not at C:\Users\ USER \Documents\WindowsPowerShell\AWSDevTools\AWSDev

you need use kill -9 4343 (use lsof -wni tcp:3000 to see which process used 3000 port and get the process pid)

<div id="google_map" class="google_map" style="width: 750px; height: 500px;"></div> <script src="//maps.googleapis.com/maps/api/js?v=3.2&amp;sensor=false"></script> <script src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/routeboxer/src/RouteBoxer.js"></script> <script type="text/javascript">   //placing a marker on the map function createMarker(map, coords, title) {  var marker = new google.maps.Marker({   position: coords,   map: map,   title: title,   draggable: false  });  return marker; } //Search places having coordinates inside the boxes function findPlaces(boxes) {  var data = "";  for (var i = 0; i < boxes.length; i++) {   //form the query string that will be sent via ajax   if (data != "") {    data += "&";   }   data += "boxes[]=" + boxes[i].getNorthEast().lat() + ":" + boxes[i].getNorthEast().l

Solution 1 config . app_generators . scaffold_controller = :scaffold_controller Solution 2 config . generators do | g | g . scaffold_controller "scaffold_controller" end Solution 3 To force rails to use the normal scaffold generator, add -c=scaffold_generator to the end of the command

First run "gem install refinerycms" Then add the following gem then problem will be resolve gem 'refinerycms',      '~> 3.0.0.dev', git: 'https://github.com/refinery/refinerycms.git' gem 'refinerycms-i18n', '~> 3.0.0.dev', git: 'https://github.com/refinery/refinerycms-i18n.git' Then run rails generate refinery:cms --fresh-installation

$ gem install bundler     $ bundle gem dogeify   This will create following directories   $ tree dogeify dogeify ├── .gitignore ├── Gemfile ├── LICENSE.txt ├── README.md ├── Rakefile ├── dogeify.gemspec └── lib    ├── dogeify    │   └── version.rb    └── dogeify.rb         Let's first look at the gemspec file ( dogeify.gemspec in this case).    # coding: utf-8 lib = File .expand_path( '../lib' , __FILE_ _ ) $LOAD_PATH .unshift(lib) unless $LOAD_PATH . include ?(lib) require 'dogeify/version' Gem::Specification .new do |spec| spec.name = "dogeify" spec.version = Dogeify::VERSION spec.authors = [ "Matt Huggins" ] spec.email = [ "matt.huggins@gmail.com" ] spec.description = %q{Convert everyday boring English into doge speak!} spec.summary = %q{English to doge translations} spec.homepage = "" spec.license = "MIT" spec.files

[       {:name => 'Åland Islands', :iso_code => 'AX'},       {:name => 'Albania', :iso_code => 'AL'},       {:name => 'Algeria', :iso_code => 'DZ'},       {:name => 'American Samoa', :iso_code => 'AS'},       {:name => 'Andorra', :iso_code => 'AD'},       {:name => 'Angola', :iso_code => 'AO'},       {:name => 'Anguilla', :iso_code => 'AI'},       {:name => 'Antarctica', :iso_code => 'AQ'},       {:name => 'Antigua and Barbuda', :iso_code => 'AG'},       {:name => 'Argentina', :iso_code => 'AR'},       {:name => 'Armenia', :iso_code => 'AM'},       {:name => 'Aruba', :iso_code => 'AW'},       {:name => 'Australia', :iso_code => 'AU'},       {:name => 'Austria', :iso_code => 'AT'},  

require "base64" encoded_string = Base64.encode64(open("https://s3.amazonaws.com/cdn. yourwellnessroom.com/i/pillarimages/eat/E22.jpg") { |io| io.read }) decode_img= Base64.decode64(encoded_string)   File.open('image.png', 'wb') { |f| f.write(decode_img) }   user.image = image.png'   user.save

Step 1: Preparing your Application    rails new omniauth-tutorial  And integrate devise Step 2: Creating a Provider  In order to add a provider to Omniauth, you will need to sign up as a developer on the provider’s site. Once you’ve signed up, you’ll be given two strings (sort of like a username and a password), that needs to be passed on to Omniauth. If you’re using an OpenID provider, then all you need is the OpenID URL. If you want to use Facebook authentication, head over to developers.facebook.com/apps and click on “Create New App”. Fill in all necessary information, and once finished, copy your App’s ID and Secret. Configuring Twitter is a bit more complicated on a development machine, since they don’t allow you to use “localhost” as a domain for callbacks. Configuring your development environment for this kind of thing is outside of the scope of this tutorial, however, I recommend you use Pow if you’re on a Mac. Add to your  Gemfile : gem ' o

Put this in config.ru :-  require 'sidekiq/web' run Rack::URLMap.new(     "/" => Rails.application,     "/sidekiq" => Sidekiq::Web )

I just add a last_sign_out_at column to my Users table and then subclassed the Devise sessions controller so I could override the destroy method to set it when the session is destroyed (user signs out): # app/controllers class SessionsController < Devise :: SessionsController def destroy current_user . update_attribute (: last_sign_out_at , Time . now ) super end end     And then in my User model I have a method to check if the user is online:   class User < ActiveRecord :: Base def online ? if current_sign_in_at . present ? last_sign_out_at . present ? ? current_sign_in_at > last_sign_out_at : true else false end end end   Also you need to tell Devise to use the new Sessions controller in your routes.  

 RewriteEngine On RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R]

I added this path in the beginning of schedule.rb:- env :PATH, '/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'

In app/helpers/application_helper.rb :- module ApplicationHelper     def flash_class(level)         case level         when 'notice' then "alert alert-info"         when 'success' then "alert alert-success"         when 'error' then "alert alert-error"         when 'alert' then "alert alert-error"         end       end end   Somewhere in app/views/layouts/application.html.erb : <%= render 'layouts/flash_messages' %>   app/views/layouts/_flash_messages.html.erb < div > <% flash . each do | key , value | %> < div class = "<%= flash_class(key) %> fade in" > < a href = "#" data - dismiss = "alert" class = "close" >×</ a > <%= value %> </ div > <% end %> </ div > <style> .alert { padding: 8px 35px 8px 14px; margin-bottom: 18px; color: #c09853

In routes.rb namespace :api do namespace :v1 do devise_scope :user do post "/sign_in" , :to => 'session#create' delete "/sign_out" , :to => 'session#destroy' end end   In  Api::V1::SessionsController:- class Api::V1::SessionsController < Api::V1::ApiController     before_filter :authenticate_user!, :except => [:create]     skip_before_filter  :verify_authenticity_token     respond_to :json         def create            email = params[:email]         password = params[:password]         if request.format != :json           render :status=>406, :json=>{:message=>"The request must be json"}           return         end         if email.nil? and password.nil?           render :status=>400,           :json=>{:message=>"The request must contain the user email and password."}           return         end         @user=User.find_by_email(e

For the past two weeks I have been working on building out an API for one of our existing Rails apps for use by mobile devices. I started with Android since there were less barriers to entry there (no specialty development hardware needed) as well as perceiving that Java might be more beneficial for my career in the long-run than the Apple-centric Objective-C language. It took me quite awhile to wrap my head around what exactly I needed to accomplish to get this happen at the beginning; many of the tutorials and how-to's out there are outdated and not quite what I wanted, but I think I figured out an effective, secure and easy way to help get you started should you need to accomplish something similar. Before I do anything with the mobile device, we need to build out an API that can be communicated with on the server side of things. In rails, this is remarkably easy. My goal was to allow a user to login remotely, then be able to send either email or text messages t

First, installing dependencies:-  sudo aptitude install openssl build-essential xorg libssl-dev For 64-bit OS: wget http://wkhtmltopdf.googlecode.com/files/wkhtmltopdf-0.9.2-static-amd64.tar.bz2 tar xvjf wkhtmltopdf-0.9.2-static-amd64.tar.bz2 chown root:root wkhtmltopdf-amd64 mv wkhtmltopdf-amd64 /usr/bin/wkhtmltopdf

 Open .conf file sudo nano /etc/apache2/sites-available/testapp.conf Put below content in this file:- Listen 88 <VirtualHost *:80>         # The ServerName directive sets the request scheme, hostname and port that         # the server uses to identify itself. This is used when creating         # redirection URLs. In the context of virtual hosts, the ServerName         # specifies what hostname must appear in the request's Host: header to         # match this virtual host. For the default virtual host (this file) this         # value is not decisive as it is used as a last resort host regardless.         # However, you must set it for any further virtual host explicitly.         ServerName 52.5.211.191         ServerAdmin webmaster@localhost         DocumentRoot /home/ubuntu/ywroom-staging/public         RailsEnv production         # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,         # error, crit, alert, emerg.         # It i