Class: RuboCop::Cop::Rails::RedundantForeignKey

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

Overview

Detects cases where the ‘:foreign_key` option on associations is redundant.

Examples:

# bad
class Post
  has_many :comments, foreign_key: 'post_id'
end

class Comment
  belongs_to :post, foreign_key: 'post_id'
end

# good
class Post
  has_many :comments
end

class Comment
  belongs_to :author, foreign_key: 'user_id'
end

Constant Summary collapse

MSG = 
'Specifying the default value for `foreign_key` is redundant.'
RESTRICT_ON_SEND = 
%i[belongs_to has_one has_many has_and_belongs_to_many].freeze

Instance Method Summary collapse

Instance Method Details

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/rails/redundant_foreign_key.rb', line 40

def on_send(node)
  association_with_foreign_key(node) do |type, name, options, foreign_key_pair, foreign_key|
    if redundant?(node, type, name, options, foreign_key)
      add_offense(foreign_key_pair) do |corrector|
        range = range_with_surrounding_space(foreign_key_pair.source_range, side: :left)
        range = range_with_surrounding_comma(range, :left)

        corrector.remove(range)
      end
    end
  end
end