Build a beautiful Active Admin interface using Active Admin themes

As we know Active Admin (https://activeadmin.info) is a popular Ruby on Rails plugin to generate admin interface.  It has many benefit over currently existing other similar plugin like Rails Admin. Active Admin gives the facility to customize pages, layouts. Here is simple demo of Active Admin with default theme http://demo.activeadmin.info/admin. Beside this default theme, you…

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Rails Tips: ActiveRecord Conditional Validation

In my User model, I have to check validation presence of state only for users from Nepal. No need to check validation for the users from other country. For this I have implemented as follows: class User < ActiveRecord::Base validates_presence_of :state, :if => :in_nepal? private def in_nepal? country == ‘Nepal’ end end Here country is…

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Ruby Gemset

What is Gemset? A Gemset is just a container you can use to keep gems separate from each other. We create separate gemset for different project which only have required gem with version for the particular project. It is a separate directory with version of various gems you are using. Why Gemset? The Big Idea:…

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Rails tutorial: Upload image with paperclip gem

Paperclip is intended as an easy file attachment library for Active Record. Paperclip is ruby gem which helps to upload image or attachment in rails application. We can upload attachment using paperclip gem in rails through following steps. Add paperclip gem to your Gemfile gem “paperclip” Install gem (run on command prompt): bundle install Create…

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Rails tutorial: Send email with rails

In rails we use ActionMailer to send email. For more detail about ActionMailer check this link: http://guides.rubyonrails.org/action_mailer_basics.html Now its time to create mailer. Use following line of command to create mailer. Here I created Blog Mailer which is used to send email to all blog subscriber when new blog published. rails g mailer ArticleMailer Which…

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Rails SMTP configuration in runtime

SMTP is mail delivery method in rails  which is used to send email through rails. Setting of SMTP is configured in different environment like development, production and test. For this we configure following setting in different file like config/environments/development.rb, config/environments/production.rb, config/environments/test.rb with respect to different environment.  config.action_mailer.smtp_settings = { address: “smtp.gmail.com”, port: 587, domain: “mail.google.com”,…

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Install and use MongoDB with Rails in Ubuntu

MongoDB is a scalable, high-performance, document-oriented schemaless database. In this post I describe how to install MongoDB in ubuntu 12.04 and how to use MongoDB with rails. Followings are the steps to install MongoDB 1. Add GPG Key sudo apt-key adv –keyserver keyserver.ubuntu.com –recv 7F0CEB10 2. Edit your source.list sudo gedit /etc/apt/sources.list and add this…

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Rails tutorial: Simple blog subscription feature in Rails

Here is a simple Rails MVC tutorial guide. This step by step tutorial will help you to configure routes, generate model, controller and view (i.e. MVC). It will also teach you how to send email using ActionMailer in Rails. Before start this you have to setup new rails application with MySQL database. My previous post…

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