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Using Rails Callbacks to Auto-Generate a Unique Slug

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                  class Article < ApplicationRecord
  before_create :generate_slug

  private

  def generate_slug
    self.slug = title.parameterize
  end
end

                  class AddSlugToArticles < ActiveRecord::Migration[7.0]
  def change
    add_column :articles, :slug, :string
    add_index :articles, :slug, unique: true
  end
end

Slugs are essential for SEO-friendly URLs and user-friendly navigation, and this snippet ensures each article automatically generates a unique slug based on its title. Using the before_create callback, we transform the title into a URL-safe format using parameterize. The corresponding migration adds a slug field with a unique index to prevent duplicates. This solution simplifies URL structures and avoids exposing raw database IDs. A potential challenge is handling duplicate titles—extending the logic to append a unique identifier can solve this issue. Overall, this method enhances usability while keeping URL structures clean and semantic.

Martin Sojka

More from Martin Sojka

Using Rails Callbacks to Auto-Generate a Unique Slug

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More from Martin Sojka