class RuboCop::Cop::Rails::SafeNavigation
This cop converts usages of `try!` to `&.`. It can also be configured to convert `try`. It will convert code to use safe navigation.
@example ConvertTry: false (default)
# bad foo.try!(:bar) foo.try!(:bar, baz) foo.try!(:bar) { |e| e.baz } foo.try!(:[], 0) # good foo.try(:bar) foo.try(:bar, baz) foo.try(:bar) { |e| e.baz } foo&.bar foo&.bar(baz) foo&.bar { |e| e.baz }
@example ConvertTry: true
# bad foo.try!(:bar) foo.try!(:bar, baz) foo.try!(:bar) { |e| e.baz } foo.try(:bar) foo.try(:bar, baz) foo.try(:bar) { |e| e.baz } # good foo&.bar foo&.bar(baz) foo&.bar { |e| e.baz }
Constants
- MSG
- RESTRICT_ON_SEND
Public Class Methods
autocorrect_incompatible_with()
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rubocop:enable Style/ClassAndModuleChildren
# File lib/rubocop/cop/rails/safe_navigation.rb, line 59 def self.autocorrect_incompatible_with [Style::RedundantSelf] end
Public Instance Methods
on_send(node)
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# File lib/rubocop/cop/rails/safe_navigation.rb, line 63 def on_send(node) try_call(node) do |try_method, dispatch| return if try_method == :try && !cop_config['ConvertTry'] return unless dispatch.sym_type? && dispatch.value.match?(/\w+[=!?]?/) add_offense(node, message: format(MSG, try: try_method)) do |corrector| autocorrect(corrector, node) end end end
Private Instance Methods
autocorrect(corrector, node)
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# File lib/rubocop/cop/rails/safe_navigation.rb, line 76 def autocorrect(corrector, node) method_node, *params = *node.arguments method = method_node.source[1..-1] range = if node.receiver range_between(node.loc.dot.begin_pos, node.loc.expression.end_pos) else corrector.insert_before(node, 'self') node end corrector.replace(range, replacement(method, params)) end
replacement(method, params)
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# File lib/rubocop/cop/rails/safe_navigation.rb, line 90 def replacement(method, params) new_params = params.map(&:source).join(', ') if method.end_with?('=') "&.#{method[0...-1]} = #{new_params}" elsif params.empty? "&.#{method}" else "&.#{method}(#{new_params})" end end