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try

try(*args)

Instance Public methods

Calling try on nil always returns nil. It becomes specially helpful when navigating through associations that may return nil.

nil.try(:name) # => nil

Without try

@person && !@person.children.blank? && @person.children.first.name

With try

@person.try(:children).try(:first).try(:name)

Links:

https://github.com/rails/rails/blob/3b7d8351f66c7169242f38aed99f4c60f152562f/activesupport/lib/active_support/core_ext/object/try.rb#L71

doc_ruby_on_rails

2015-06-20 00:00:00

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