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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Why college projects are important?

In my career I had taken more than 100’s of interviews in my company and the number is raising up. Most of candidate are freshers and some are experienced developers. Fresher candidate apply for entry level job whereas experience developers apply for mid-level and senior level position. Here I’m not talking about experience developers. There…

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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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Lesson learned from hospital cleaning Staff

On 8th Jan, I got chance to visit a government hospital in Kathmandu. In the leisure time I observed different people including patient, doctors, hospital staff, cleaning staff. The hospital is clean in comparing with other government hospital. While observing cleaning team, I found few things: No one are waiting for their senior orders. They…

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Rails 5: redirect_to :back is not working?

In earlier version of Rails (<5.0) we used redirect_to :back to go previous page. With this method we got ActionController::RedirectBackError error when HTTP_REFERRER is not present. This may happen when we refresh the page. To fix this problem we have new method called redirect_back method as following: redirect_back fallback_location: root_path It will redirect to the…

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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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Setting MySQL database to Rails Application

MySQL is an open-source relational database management system. In this post I’m going to explain to use MySQL database to rails project. Install MySQL database if you do not have installed MySQL databse to your system.When you create new rails project with following command, it will add SQLite gem to the Gemfile, which is for…

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