Ruby on Rails Class Organization Model Class
Example
class Post < ActiveRecord::Base
belongs_to :user
has_many :comments
validates :user, presence: true
validates :title, presence: true, length: { in: 6..40 }
scope :topic, -> (topic) { joins(:topics).where(topic: topic) }
before_save :update_slug
after_create :send_welcome_email
def publish!
update(published_at: Time.now, published: true)
end
def self.find_by_slug(slug)
find_by(slug: slug)
end
private
def update_slug
self.slug = title.join('-')
end
def send_welcome_email
WelcomeMailer.welcome(self).deliver_now
end
end
Models are typically responsible for:
- setting up relationships
- validating data
- providing access to data via scopes and methods
- Performing actions around persistence of data.
At the highest level, models describe domain concepts and manages their persistence.
