method

validates_length_of

v6.1.7.7 - Show latest stable - 1 note - Class: ActiveRecord::Validations::ClassMethods

1.0.0 (0)
1.1.6 (0)
1.2.6 (0)
2.0.3 (5)
2.1.0 (2)
2.2.1 (6)
2.3.8 (0)
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 (-35)
5.1.7 (0)
5.2.3 (0)
6.0.0 (0)
6.1.3.1 (0)
6.1.7.7 (0)
7.0.0 (0)
7.1.3.2 (0)
7.1.3.4 (0)
What's this?

validates_length_of(*attr_names) public

Validates that the specified attributes match the length restrictions supplied. If the attribute is an association, records that are marked for destruction are not counted.

See ActiveModel::Validations::HelperMethods.validates_length_of for more information.

Show source

# File activerecord/lib/active_record/validations/length.rb, line 19
      def validates_length_of(*attr_names)
        validates_with LengthValidator, _merge_attributes(attr_names)
      end

March 13, 2010

3 thanks

Can be used with has_many associations

You can also use this to validate that a has_many association has a specified number of records on the other end:

has_many :members

validates_length_of :members, :minimum => 1

validates_length_of

Related methods

Can be used with has_many associations