Class: RuboCop::Cop::Rails::HttpPositionalArguments

Inherits:
Cop
  • Object
show all
Extended by:
TargetRailsVersion
Defined in:
lib/rubocop/cop/rails/http_positional_arguments.rb

Overview

This cop is used to identify usages of http methods like ‘get`, `post`, `put`, `patch` without the usage of keyword arguments in your tests and change them to use keyword args. This cop only applies to Rails >= 5 . If you are running Rails < 5 you should disable the Rails/HttpPositionalArguments cop or set your TargetRailsVersion in your .rubocop.yml file to 4.0, etc.

Examples:

# bad
get :new, { user_id: 1}

# good
get :new, params: { user_id: 1 }

Constant Summary collapse

MSG = 
'Use keyword arguments instead of ' \
'positional arguments for http call: `%<verb>s`.'.freeze
KEYWORD_ARGS = 
%i[
  method params session body flash xhr as headers env
].freeze
HTTP_METHODS = 
%i[get post put patch delete head].freeze

Constants included from Util

Util::ASGN_NODES, Util::CONDITIONAL_NODES, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::LOGICAL_OPERATOR_NODES, Util::MODIFIER_NODES, Util::OPERATOR_METHODS, Util::SHORTHAND_ASGN_NODES

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, operator?, parentheses?, same_line?, to_string_literal, to_supported_styles, tokens

Methods included from PathUtil

absolute?, 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

given a pre Rails 5 method: get :new, @user.id, {}

the result should look like:

get :new, params: { user_id: @user.id }, session: {}

the http_method is the method used to call the controller the controller node can be a symbol, method, object or string that represents the path/action on the Rails controller the data is the http parameters and environment sent in the Rails 5 http call

Returns:

  • lambda of auto correct procedure



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# File 'lib/rubocop/cop/rails/http_positional_arguments.rb', line 54

def autocorrect(node)
  http_path, *data = *node.arguments

  controller_action = http_path.source
  params = convert_hash_data(data.first, 'params')
  session = convert_hash_data(data.last, 'session') if data.size > 1
  # the range of the text to replace, which is the whole line
  code_to_replace = node.loc.expression
  # what to replace with
  format = parentheses_format(node)
  new_code = format(format, name: node.method_name,
                            action: controller_action,
                            params: params, session: session)
  ->(corrector) { corrector.replace(code_to_replace, new_code) }
end

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/rails/http_positional_arguments.rb', line 35

def on_send(node)
  http_request?(node) do |data|
    return unless needs_conversion?(data)

    add_offense(node, location: :selector,
                      message: format(MSG, verb: node.method_name))
  end
end