method

has_attribute?

v8.0.0 - Show latest stable - Class: ActiveRecord::AttributeMethods::ClassMethods

has_attribute?(attr_name)

public

Returns true if the given attribute exists, otherwise false.

class Person < ActiveRecord::Base
  alias_attribute :new_name, :name
end

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

# File activerecord/lib/active_record/attribute_methods.rb, line 253
      def has_attribute?(attr_name)
        attr_name = attr_name.to_s
        attr_name = attribute_aliases[attr_name] || attr_name
        attribute_types.key?(attr_name)
      end

has_attribute?

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