Method: ActiveRecord::AttributeMethods::ClassMethods#attribute_names

Defined in:
lib/active_record/attribute_methods.rb

#attribute_names ⇒ Object

Returns an array of column names as strings if it’s not an abstract class and table exists. Otherwise it returns an empty array.

class Person < ActiveRecord::Base
end

Person.attribute_names
# => ["id", "created_at", "updated_at", "name", "age"]



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# File 'lib/active_record/attribute_methods.rb', line 236

def attribute_names
  @attribute_names ||= if !abstract_class? && table_exists?
    attribute_types.keys
  else
    []
  end.freeze
end