Encoding issue in Ruby
This guide discusses how to handle the encoding issue in Ruby.
If you've ever tried to read or write a file that contains Unicode characters, you've probably encountered the encoding issue.
The easiest way to fix this is to use the File#open method with the :encoding option.
Here's an example of how to read a…
Rails Basics
query Issues in Ruby
If you want to solve N+1 query issues in Ruby, you need to use the ActiveRecord#eager_load or ActiveRecord#includes methods.
# without eager loading
posts = Post.all
posts.each do |post|
puts post.user.name
end
# with eager loading
posts = Post.includes(:user)
posts.each do |post|
puts post.user.name
end
The ActiveRecord#includes method will eagerly load the associations (in this case, the user association).…
Cucumber in Rails
Let's see how to implement Cucumber in Rails. Cucumber is a tool that helps you test your web application. It does this by running automated tests written in a language called Gherkin.
Gherkin is a plain-text language with a few simple rules. It's designed to be easy to learn and easy to read.
How Cucumber…
Doorkeeper in Rails
This tutorial will show you how to implement Doorkeeper in Rails. Doorkeeper is a Ruby gem that allows you to easily add OAuth 2.0 provider functionality to your Ruby on Rails application.
Installing Doorkeeper
Installing Doorkeeper is straightforward; you need to add it to your Gemfile:
gem 'doorkeeper'
And then run bundle install.
Once you have installed…
Devise in Rails
Devise is a trendy authentication gem for Rails. In this article, I will show you how to implement Devise in Rails to establish user authentication in your application.
The first thing you need to do is install the Devise gem.
gem install devise
After the gem is installed, you need to run the devise generator.
rails generate…
Rails Helpers
Rails helpers are methods defined in your controller or view files.
They are used to format data before displaying it to the user or to create dynamic HTML elements.
You can create your own helpers throughout your application or use the built-in helpers provided by Rails.
Using Rails Helpers
To use a helper method, you can call…
If you want to connect PostgreSQL In Rails, you first need to install the pg gem. You can do this by adding the following line to your Gemfile:
gem 'pg'
Then run bundle install from the command line to install the gem.
Once the gem is installed, you can require it in your project.
Example:
require "pg"
The pg gem defines…
In this article, we'll show you how to use Paperclip in Rails to add images processing them.
Paperclip is a gem used for image processing in Ruby. It is one of the most popular image processing gems and has been used by projects like GitHub, Shutterstock, and thoughtbot.
How to install Paperclip
To install Paperclip, add it…
Rails associations are a way to link one model to another. There are four different types of associations:
One-to-one
One-to-many
Many-to-many
Polymorphic
Each type of association has its own set of methods that you can use to interact with the associated data.
One-to-One Associations
A one-to-one association means that each record in one…
To implement a cache in Rails, you can use the ActiveSupport::Cache class.
The ActiveSupport::Cache class provides a unified API for a variety of caching backends.
For example:
Memory store
File store
Dalli store
You can use the ActiveSupport::Cache::Store#fetch method to read from the cache.
If the data is not in the cache, the block you pass…