class RuboCop::Cop::Rails::Blank
This cops checks for code that can be changed to `blank?`. Settings:
NilOrEmpty: Convert checks for `nil` or `empty?` to `blank?` NotPresent: Convert usages of not `present?` to `blank?` UnlessPresent: Convert usages of `unless` `present?` to `blank?`
@example
# NilOrEmpty: true # bad foo.nil? || foo.empty? foo == nil || foo.empty? # good foo.blank? # NotPresent: true # bad !foo.present? # good foo.blank? # UnlessPresent: true # bad something unless foo.present? unless foo.present? something end # good something if foo.blank? if foo.blank? something end
Constants
- MSG_NIL_OR_EMPTY
- MSG_NOT_PRESENT
- MSG_UNLESS_PRESENT
Public Instance Methods
autocorrect(node)
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# File lib/rubocop/cop/rails/blank.rb, line 108 def autocorrect(node) lambda do |corrector| method_call, variable1 = unless_present?(node) if method_call corrector.replace(node.loc.keyword, 'if') range = method_call.loc.expression else variable1, _variable2 = nil_or_empty?(node) || not_present?(node) range = node.loc.expression end corrector.replace(range, replacement(variable1)) end end
on_if(node)
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# File lib/rubocop/cop/rails/blank.rb, line 93 def on_if(node) return unless cop_config['UnlessPresent'] return unless node.unless? unless_present?(node) do |method_call, receiver| range = unless_condition(node, method_call) add_offense(node, location: range, message: format(MSG_UNLESS_PRESENT, replacement(receiver), range.source)) end end
on_or(node)
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# File lib/rubocop/cop/rails/blank.rb, line 80 def on_or(node) return unless cop_config['NilOrEmpty'] nil_or_empty?(node) do |variable1, variable2| return unless variable1 == variable2 add_offense(node, message: format(MSG_NIL_OR_EMPTY, replacement(variable1), node.source)) end end
on_send(node)
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# File lib/rubocop/cop/rails/blank.rb, line 69 def on_send(node) return unless cop_config['NotPresent'] not_present?(node) do |receiver| add_offense(node, message: format(MSG_NOT_PRESENT, replacement(receiver), node.source)) end end
Private Instance Methods
replacement(node)
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# File lib/rubocop/cop/rails/blank.rb, line 134 def replacement(node) node.respond_to?(:source) ? "#{node.source}.blank?" : 'blank?' end
unless_condition(node, method_call)
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# File lib/rubocop/cop/rails/blank.rb, line 126 def unless_condition(node, method_call) if node.modifier_form? node.loc.keyword.join(node.loc.expression.end) else node.loc.expression.begin.join(method_call.loc.expression) end end