instance method
one?
Ruby on Rails 7.2.3
Since v5.2.8.1Signature
one?(*args)Returns true if there is exactly one record.
When a pattern argument is given, this method checks whether elements in the Enumerable match the pattern via the case-equality operator (===).
posts.one?(Post) # => true or false
Parameters
-
argsrest
Source
# File activerecord/lib/active_record/relation.rb, line 407
def one?(*args)
return false if @none
return super if args.present? || block_given?
return records.one? if loaded?
limited_count == 1
end
Defined in activerecord/lib/active_record/relation.rb line 407
· View on GitHub
· Improve this page
· Find usages on GitHub
Defined in ActiveRecord::Relation