class Post < ApplicationRecord
  belongs_to :user
  has_many :comments

  #  id                   :integer          not null, primary key
  #  user_id              :integer
  #  content              :text             default("")
  #  created_at           :datetime
  
  DEFAULT_PAGE_LIMIT = 50
  
  # By default fetching records in descending order, however, we can always override the default scope using unscoped method
  default_scope -> { order(created_at: :desc) }

 # We can reuse this anywhere and pass the different limit as per the need, By default limit is 50
  scope :most_recent, ->(limit = DEFAULT_PAGE_LIMIT) { preload_conditions.limit(limit) }

  # This will preload related objects when you include it in the query
  def self.preload_conditions
    includes(:user, comments: [:user])
  end
end