Module | DataMapper::Validate::ValidatesLength |
In: |
lib/dm-validations/length_validator.rb
|
Validates that the length of the attribute is equal to, less than, greater than or within a certain range (depending upon the options you specify).
@option :allow_nil<Boolean> true/false (default is true) @option :minimum ensures that the attribute‘s length is greater than
or equal to the supplied value
@option :min alias for :minimum @option :maximum ensures the attribute‘s length is less than or equal
to the supplied value
@option :max alias for :maximum @option :equals ensures the attribute‘s length is equal to the
supplied value
@option :is alias for :equals @option :in<Range> given a Range, ensures that the attributes length is
include?'ed in the Range
@option :within<Range> alias for :in
@example [Usage]
require 'dm-validations' class Page include DataMapper::Resource property high, Integer property low, Integer property just_right, Integer validates_length :high, :min => 100000000000 validates_length :low, :equals => 0 validates_length :just_right, :within => 1..10 # a call to valid? will return false unless: # high is greater than or equal to 100000000000 # low is equal to 0 # just_right is between 1 and 10 (inclusive of both 1 and 10)