Class: RuboCop::Cop::Rails::ActiveRecordCallbacksOrder

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Defined in:
lib/rubocop/cop/rails/active_record_callbacks_order.rb

Overview

Checks that Active Record callbacks are declared in the order in which they will be executed.

Examples:

# bad
class Person < ApplicationRecord
  after_commit :after_commit_callback
  before_validation :before_validation_callback
end

# good
class Person < ApplicationRecord
  before_validation :before_validation_callback
  after_commit :after_commit_callback
end

Constant Summary collapse

MSG = 
'`%<current>s` is supposed to appear before `%<previous>s`.'
CALLBACKS_IN_ORDER = 
%i[
  after_initialize
  before_validation
  after_validation
  before_save
  around_save
  before_create
  around_create
  after_create
  before_update
  around_update
  after_update
  before_destroy
  around_destroy
  after_destroy
  after_save
  after_commit
  after_rollback
  after_find
  after_touch
].freeze
CALLBACKS_ORDER_MAP = 
CALLBACKS_IN_ORDER.each_with_index.to_h.freeze

Instance Method Summary collapse

Instance Method Details

#on_class(class_node) ⇒ Object 



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# File 'lib/rubocop/cop/rails/active_record_callbacks_order.rb', line 51

def on_class(class_node)
  previous_index = -1
  previous_callback = nil

  defined_callbacks(class_node).each do |node|
    callback = node.method_name
    index = CALLBACKS_ORDER_MAP[callback]

    if index < previous_index
      message = format(MSG, current: callback, previous: previous_callback)
      add_offense(node, message: message) do |corrector|
        autocorrect(corrector, node)
      end
    end
    previous_index = index
    previous_callback = callback
  end
end