has_attribute?

has_attribute?(attr_name)

Instance Public methods

Returns true if the given attribute is in the attributes hash, otherwise false.

class Person < ActiveRecord::Base
end

person = Person.new
person.has_attribute?(:name)    # => true
person.has_attribute?('age')    # => true
person.has_attribute?(:nothing) # => false

Links:

https://github.com/rails/rails/blob/1d6d72ac7be9512041bfd1dfb928f242ede5c061/activerecord/lib/active_record/attribute_methods.rb#L261

doc_ruby_on_rails

2015-06-20 00:00:00

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