instance method `has_attribute?`

Ruby on Rails 6.0.6

Since v5.2.8.1

Available in: 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 exists, otherwise false.

class Person < ActiveRecord::Base
end

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 170
      def has_attribute?(attr_name)
        attribute_types.key?(attr_name.to_s)
      end

Defined in activerecord/lib/active_record/attribute_methods.rb line 170 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::AttributeMethods::ClassMethods

Signature

Parameters