instance method
attribute_names
Ruby on Rails edge
Since v3.2.22.5Signature
attribute_names()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"]
```: () -> Array
Source
# File activerecord/lib/active_record/attribute_methods.rb, line 262
def attribute_names
@attribute_names ||= if !abstract_class? && table_exists?
attribute_types.keys
else
[]
end.freeze
end
Defined in activerecord/lib/active_record/attribute_methods.rb line 262
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Defined in ActiveRecord::AttributeMethods::ClassMethods