many?

many?(&block)

Instance Public methods

Returns true if the collection has more than one record. Equivalent to collection.size > 1.

class Person < ActiveRecord::Base
  has_many :pets
end
 
person.pets.count # => 1
person.pets.many? # => false
 
person.pets << Pet.new(name: 'Snoopy')
person.pets.count # => 2
person.pets.many? # => true

You can also pass a block to define criteria. The behavior is the same, it returns true if the collection based on the criteria has more than one record.

person.pets
# => [
#      #<Pet name: "Gorby", group: "cats">,
#      #<Pet name: "Puff", group: "cats">,
#      #<Pet name: "Snoop", group: "dogs">
#    ]
 
person.pets.many? do |pet|
  pet.group == 'dogs'
end
# => false
 
person.pets.many? do |pet|
  pet.group == 'cats'
end
# => true

Links:

https://github.com/rails/rails/blob/553e61af007553788813f81963a7621c82fff65d/activerecord/lib/active_record/associations/collection_proxy.rb#L849

doc_ruby_on_rails

2025-01-10 15:47:30

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