class RuboCop::Cop::Style::SafeNavigationChainLength
Enforces safe navigation chains length to not exceed the configured maximum. The longer the chain is, the harder it becomes to track what on it could be returning ‘nil`.
There is a potential interplay with ‘Style/SafeNavigation` - if both are enabled and their settings are “incompatible”, one of the cops will complain about what the other proposes.
E.g. if ‘Style/SafeNavigation` is configured with `MaxChainLength: 2` (default) and this cop is configured with `Max: 1`, then for `foo.bar.baz if foo` the former will suggest `foo&.bar&.baz`, which is an offense for the latter.
@example Max: 2 (default)
# bad user&.address&.zip&.upcase # good user&.address&.zip user.address.zip if user
Constants
- MSG
Public Instance Methods
on_csend(node)
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# File lib/rubocop/cop/style/safe_navigation_chain_length.rb, line 29 def on_csend(node) safe_navigation_chains = safe_navigation_chains(node) return if safe_navigation_chains.size < max add_offense(safe_navigation_chains.last, message: format(MSG, max: max)) end
Private Instance Methods
max()
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# File lib/rubocop/cop/style/safe_navigation_chain_length.rb, line 46 def max cop_config['Max'] || 2 end