Class: RuboCop::Cop::Rails::RedundantReceiverInWithOptions

Inherits:
Cop
  • Object
show all
Extended by:
TargetRailsVersion
Includes:
RuboCop::Cop::RangeHelp
Defined in:
lib/rubocop/cop/rails/redundant_receiver_in_with_options.rb

Overview

This cop checks for redundant receiver in ‘with_options`. Receiver is implicit from Rails 4.2 or higher.

Examples:

# bad
class Account < ApplicationRecord
  with_options dependent: :destroy do |assoc|
    assoc.has_many :customers
    assoc.has_many :products
    assoc.has_many :invoices
    assoc.has_many :expenses
  end
end

# good
class Account < ApplicationRecord
  with_options dependent: :destroy do
    has_many :customers
    has_many :products
    has_many :invoices
    has_many :expenses
  end
end
# bad
with_options options: false do |merger|
  merger.invoke(merger.something)
end

# good
with_options options: false do
  invoke(something)
end

# good
client = Client.new
with_options options: false do |merger|
  client.invoke(merger.something, something)
end

# ok
# When `with_options` includes a block, all scoping scenarios
# cannot be evaluated. Thus, it is ok to include the explicit
# receiver.
with_options options: false do |merger|
  merger.invoke
  with_another_method do |another_receiver|
    merger.invoke(another_receiver)
  end
end

Constant Summary collapse

MSG = 
'Redundant receiver in `with_options`.'

Constants included from Util

Util::LITERAL_REGEX

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods included from TargetRailsVersion

minimum_target_rails_version, support_target_rails_version?

Methods inherited from Cop

#add_offense, all, autocorrect_incompatible_with, badge, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, #correct, department, #duplicate_location?, #excluded_file?, #find_location, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, non_rails, #parse, qualified_cop_name, #relevant_file?, #target_rails_version, #target_ruby_version

Methods included from AST::Sexp

#s

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search, #node_search_all, #node_search_body, #node_search_first

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, comment_line?, double_quotes_required?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_range, needs_escaping?, on_node, parentheses?, same_line?, to_string_literal, to_supported_styles, tokens, trim_string_interporation_escape_character

Methods included from PathUtil

absolute?, chdir, hidden_dir?, hidden_file_in_not_hidden_dir?, match_path?, pwd, relative_path, reset_pwd, smart_path

Constructor Details

This class inherits a constructor from RuboCop::Cop::Cop

Instance Method Details

#autocorrect(node) ⇒ Object 



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# File 'lib/rubocop/cop/rails/redundant_receiver_in_with_options.rb', line 98

def autocorrect(node)
  lambda do |corrector|
    corrector.remove(node.receiver.source_range)
    corrector.remove(node.loc.dot)
    corrector.remove(block_argument_range(node))
  end
end

#on_block(node) ⇒ Object 



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# File 'lib/rubocop/cop/rails/redundant_receiver_in_with_options.rb', line 82

def on_block(node)
  with_options?(node) do |arg, body|
    return if body.nil?
    return unless all_block_nodes_in(body).count.zero?

    send_nodes = all_send_nodes_in(body)

    if send_nodes.all? { |n| same_value?(arg, n.receiver) }
      send_nodes.each do |send_node|
        receiver = send_node.receiver
        add_offense(send_node, location: receiver.source_range)
      end
    end
  end
end