Ruby / Ruby on Rails

June 14, 2015
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Uploading multiple files with Carrierwave in Rails 4

This post shows how to use carrierwave gem to upload multiple files in Rails 4 Let suppose the following scenario. We have multiple projects and each project can have multiple screenshots. In project.rb class Project < ActiveRecord::Base has_many :screenshots accepts_nested_attributes_for :screenshots, […]
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June 14, 2015
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Using has_many with Nested Form in Rails 4

This post shows how to use field_for and accepts_nested_attributes_for to created nested form for has_many model Let suppose the following scenario. We have multiple projects and each project can have multiple screenshots. Following will be the definition of model classes. class […]
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February 13, 2015
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Using Twitter Bootstrap with Ruby on Rails

Step by step guide to integrate Twitter Bootstrap with Ruby on Rails application. Please note that after these steps, your application layout file will be replaced with default one. Step1: Add gem to your Gemfile gem 'twitter-bootstrap-rails' Step 2: Install required […]
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January 16, 2015
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Error installing debugger gem on ubuntu

I recently encountered error while bundle install. The issue was with debugger gem. Following is the error I was getting No source for ruby-1.9.3-p484 provided with debugger-ruby_core_source gem. extconf.rb failed After searching Google for answer, I found that this gem […]
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April 30, 2014
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Enum column in Rails

Declare an enum attribute where the values map to integers in the database, but can be queried by name. Example: class User < ActiveRecord::Base enum status: [ :admin, :user, :banned ] end  For migration, write  def up create_table :authorities do […]
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May 15, 2011
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Upgrade Redmine

Login to your server using putty Go to RubyForge and copy the URL of Redmine version you want to upgrade to. Download it to your server using wget command. Go to Redmine Site to check the requirements. Make sure you […]
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May 15, 2011
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Install RubyGems from Source

If you want to install some previous version of RubyGem or for what ever reason, want to install RubyGem from source, perform following steps Login to your server using putty Go to RubyForge and copy the URL of RubyGem of […]
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