instance method `has_attribute?`

Ruby on Rails 4.1.16

Since v4.0.13

Available in: v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

has_attribute?(attr_name)

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

Parameters

attr_name req

Source

# File activerecord/lib/active_record/attribute_methods.rb, line 261
    def has_attribute?(attr_name)
      @attributes.has_key?(attr_name.to_s)
    end

Defined in activerecord/lib/active_record/attribute_methods.rb line 261 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::AttributeMethods

Signature

Parameters