has_and_belongs_to_many.rb

# frozen_string_literal: true

module RuboCop
  module Cop
    module Rails
      # This cop checks for the use of the has_and_belongs_to_many macro.
      #
      # @example
      #   # bad
      #   # has_and_belongs_to_many :ingredients
      #
      #   # good
      #   # has_many :ingredients, through: :recipe_ingredients
      class HasAndBelongsToMany < Base
        MSG = 'Prefer `has_many :through` to `has_and_belongs_to_many`.'
        RESTRICT_ON_SEND = %i[has_and_belongs_to_many].freeze

        def on_send(node)
          return unless node.command?(:has_and_belongs_to_many)

          add_offense(node.loc.selector)
        end
      end
    end
  end
end