Ruby On Rails Programming, App Development Tips

Many times, we need to track the page views of any page such as profile page, shopping sites page in a Ruby on Rails applications, for which we can make use of Impressionist gem to track those page details easily. It is a lightweight plugin that logs impressions per action or manually per model. We can log impressions multiple times per request. And we can also attach it to a model. Below are the simple steps needed to follow to implement it: Step 1: Create a sample app using scaffold. Step 2: Add “gem ‘impressionist’” gem to the Gemfile and install it by running bundle install command. gem ‘impressionist’, git: ‘https://github.com/jordanhudgens/impressionist’ Step 3: Nowgenerate the impressions table migration by running the below commands: rails g impressionist rake db:migrate Step 4: Now we need to update our controller that we want to add the impression or page views counting system. So first we have add the following method in our controller with men...

Now a day’s most of the web or mobile applications fetch data from server which is stored in a database. REST API provides an interface to stored data that require by the applications. GraphQL is a query language for REST API's not for server databases. It is database agnostic and effectively can be used in any context where an API is used. GraphQL provide platform for declarative data fetching where client need to specify what data needs from API in response. Instead of multiple endpoints that return fixed data structures, a GraphQL server only exposes a single endpoint and responds with precisely the data a client asked for. GraphQL minimizes the amount of data that needs to be transferred over the network and improves applications operating under these conditions. Introduction to GraphQL API on Ruby on Rails Start with adding gem in Gemfile gem ‘graphql’ Run command bundle install Run command rails generate graphql:install Above command will add gr...

What is SearchKick Gem? Searchkick Gem is a Ruby on Rails gem that runs on top of Elasticsearch and makes it easy searches in a Rails-friendly fashion. Searchkick supports the complete Elasticsearch Search API, as by using it our search becomes more advanced. In addition, it allows you to add more features including analytics, auto suggestions, and personalized results. The steps are required: Add the gem “gem ‘searchkick’ “ . Then run the bundle install command. Then we will generate the complete model by using Scaffold generator rails g scaffold Article name:string description:text After running the above command it will generate all the necessary files then we will run the database migration command. rake db:migrate The controller code will be modified like that Def index Query=params[:q].presence || “*” @artivles=Article.search( query, page: params[:page}, per_page: 25 ) end The model code will be modified like that searchkick def search_data { t...

Step 1: First install postgres in Ubuntu system using following commands. $ sudo apt-get update $ sudo apt-get install postgresql postgresql-contrib libpq-dev To check psql (postgres) version. $  psql –version Step 2:  Now to create root user and password for psql. $  sudo -u postgres createuser -s root $  sudo -i -u  postgres Now, you are in postgres environment. postgres@admin:~$ Now, use the following command to enter and manage psql. postgres@admin:~$  psql Now, set the password for psql username “ root ”. postgres=# \password root enter password confirm Now, you can exit from psql using following command postgres=# \q Step 3:  Create new user and database in psql $ sudo su postgres $ psql -c "create user mack with password 'mack'" $ psql -c "create database mackdb owner mack" $ sudo -i -u postgres postgres@admin:~$  psql Step 4:  Give all privileges over database to a particular user. postgres=# grant all...

The best_in_place gem is the easiest solution for in place editing in Ruby on Rails. This gem provides functionality of “in place editing” in ruby on rails without writing any extra ajax code. It supports text inputs, textarea, select dropdown, checkboxes, jQuery UI Datepickers, etc. Also Displays server-side validation Installation Steps of “best_in_place” Gem : Installing best_in_place is very easy and straight-forward. Just begin including the gem in your Gemfile: gem ‘best_in_place’ After that, specify the use of the jquery and best in place javascripts in your application.js, and optionally specify jquery-ui if you want to use jQuery UI datepickers: //= require jquery //= require best_in_place //= require jquery-ui //= require best_in_place.jquery-ui Then, just add a binding to prepare all best in place fields when the document is ready: $(document).ready(function() { /* Activating Best In Place */ jQuery(".best_in_place").best_in_place(); });...

Action Mailer is the Rails component that enables applications to send and receive emails. In Rails, emails are used by creating mailers that inherit from “ActionMailer::Base” in app/mailers. Those mailers have associated views that appear alongside controller views in app/views. Now we will build a rails application which will send an email to the user when a new user is created. Let’s create a new rails application. $ rails new sample_app $ cd sample_app $ rails generate scaffold user first_name:string last_name:string phone_number:string email:string $ rake db:migrate Action Mailer- Configuration: Following are the steps you have to follow to complete your configuration before proceeding with the actual work. We will just add following lines of code in  config/environments/development.rb config.action_mailer.delivery_method = :smtp #It tells ActionMailer that you want to use the SMTP server. Generate a Mailer : We now have a basic application, let’s make ...

JWT is a Json Web Token,It is a standard and has been implemented in almost all popular programming languages. Hence, they can be easily used or exchanged in systems implemented in diverse platforms. JWT has libraries for almost all platforms and Ruby is no exception. Now we will see how JWT is used in Rails: We will create a simple Rails application which uses the excellent Devise gem for authentication and the jwt gem for creating and verifying JWT tokens. Let’s create a sample Rails application : rails new rails_on_jwt Once the application is generated, create a Home controller which we will use to check our authentication. Create  home_controller.rb in the app/controllers classHomeController ApplicationController def index end end Write the route for  HomeController to /home in config/routes.rb: Rails.application.routes.draw do get 'home' => 'home#index' end Now, add Devise to our application. First, we will ...

Introduction: Sometimes the rails application requires sending the bulk mails using action mailers on the single attempt. The user can be able to send them seamlessly. But, this task is not possible in synchronous way. This will affect whole application performance and will take a lot of time to load the respective pages. To overcome this problem rails community have enormous kinds of solutions. Among them  sidekiq is the best choice to overcome this kind of problems. The sidekiq is a full-featured background processing framework for Ruby. It aims to be simple to integrate with any modern Rails application and much higher performance than other existing solutions. The Redisis an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperlog logs and geospatial indexes with radius queries. The Action Mai...

Introduction to DevOps… DevOps is a combination of Development (Software Development) and Operations (Software Productions/IT Operations…) What is DevOps? DevOps is not a technology or tool, it is a concept of behavior, and it is an extension of Agile Methodology. The DevOps is a set of practices designed to overcome the gap between development, QA and Operations by effective communication and collaboration, incorporating continuous integration process with automated deployment. DevOps helps to increase an organization’s speed to deliver applications and services. It allows organizations to serve their customers better and compete more strongly in the market. There are four basic continuous processes in DevOps: Continuous Integration Continuous Delivery Continuous Testing Continuous Monitoring Relationship between Agile and DevOps Agile Development is an umbrella term for several iterative and incremental software development methodologies. The mos...