class RuboCop::Cop::Lint::ToJSON
This cop checks to make sure `#to_json` includes an optional argument. When overriding `#to_json`, callers may invoke JSON generation via `JSON.generate(your_obj)`. Since `JSON#generate` allows for an optional argument, your method should too.
@example
# bad def to_json end # good def to_json(*_args) end
Constants
- MSG
Public Instance Methods
autocorrect(node)
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# File lib/rubocop/cop/lint/to_json.rb, line 30 def autocorrect(node) lambda do |corrector| # The following used `*_args` because `to_json(*args)` has # an offense of `Lint/UnusedMethodArgument` cop if `*args` # is not used. corrector.insert_after(node.loc.name, '(*_args)') end end
on_def(node)
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# File lib/rubocop/cop/lint/to_json.rb, line 24 def on_def(node) return unless node.method?(:to_json) && node.arguments.empty? add_offense(node) end