juliendargelos/sluggable-rails

Slugify your rails records.

Sluggable Rails 🏅

Provide a unique slug to your records, generated from the attribute of your choice.

Usage

Use the has_slug method:

# == Schema Information
#
# Table name: Post
#
#  id         :integer          not null, primary key
#  title      :string
#  slug       :string           not null
#  created_at :datetime         not null
#  updated_at :datetime         not null
#

class Post < ApplicationRecord
  #...

  has_slug by: :title

  #...
end

post = Post.create title: 'My first slugified post!'
post.slug # "my-first-slugified-post"

another_post = Post.create title: 'My first slugified post!'
another_post.slug # "my-first-slugified-post-1"

In this example, the slug will be generated from the post title. By default, it will be stored in the slug attribute. You can choose another attribute to store it:

class Post < ApplicationRecord
  #...

  has_slug :custom_attribute, by: :title

  #...
end

The slug is generated with the parameterize method, you can specify a separator as it expects (default: '-'):

class Post < ApplicationRecord
  #...

  has_slug :custom_attribute, by: :title, separator: '_'

  #...

Obviously, you have to add the corresponding column to your schema:

class CreatePosts < ActiveRecord::Migration[5.1]
  def change
    create_table :posts do |t|
      t.string :title
      t.string :slug, null: false, index: true, unique: true # Or your custom attribute

      t.timestamps
    end
  end
end

The slug will be automatically generated in order to be unique. And a presence and uniqueness validations will also be added by the has_slug method.

Moreover, you can define a scope for your slug so its uniqueness will depend on other attributes:

class Post < ApplicationRecord
  #...
  
  belongs_to :user
  has_slug by: :title, scope: :user_id
  # You can specify more than one attribute by giving an array of attributes to the scope option.

  #...
end

In this example, each post will have a slug which is unique for the user it belongs to (but it could be any other attribute).

The corresponding migration would be:

class CreatePosts < ActiveRecord::Migration[5.1]
  def change
    create_table :posts do |t|
      t.string :title
      t.references :user, foreign_key: true
      t.string :slug, null: false

      t.timestamps
    end

    add_index :posts, [:user_id, :slug], unique: true
  end
end

Installation

Add this line to your application's Gemfile:

gem 'sluggable-rails'

And then execute:

$ bundle

Or install it yourself as:

$ gem install sluggable-rails

License

The gem is available as open source under the terms of the MIT License.