method

has_attribute?

v7.1.3.4 - Show latest stable - 0 notes - Class: ActiveRecord::AttributeMethods::ClassMethods

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0
3.0.9
3.1.0
3.2.1
3.2.8
3.2.13
4.0.2
4.1.8
4.2.1
4.2.7
4.2.9
5.0.0.1 (0)
5.1.7 (0)
5.2.3 (0)
6.0.0 (0)
6.1.3.1 (38)
6.1.7.7 (0)
7.0.0 (0)
7.1.3.2 (0)
7.1.3.4 (0)
What's this?

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

Show source

# File activerecord/lib/active_record/attribute_methods.rb, line 249
      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?

Related methods