46 lines
No EOL
2.3 KiB
Ruby
46 lines
No EOL
2.3 KiB
Ruby
module ActiveModel
|
|
module Validations
|
|
module ClassMethods
|
|
# Validates whether the associated object or objects are all valid themselves. Works with any kind of association.
|
|
#
|
|
# class Book < ActiveRecord::Base
|
|
# has_many :pages
|
|
# belongs_to :library
|
|
#
|
|
# validates_associated :pages, :library
|
|
# end
|
|
#
|
|
# Warning: If, after the above definition, you then wrote:
|
|
#
|
|
# class Page < ActiveRecord::Base
|
|
# belongs_to :book
|
|
#
|
|
# validates_associated :book
|
|
# end
|
|
#
|
|
# ...this would specify a circular dependency and cause infinite recursion.
|
|
#
|
|
# NOTE: This validation will not fail if the association hasn't been assigned. If you want to ensure that the association
|
|
# is both present and guaranteed to be valid, you also need to use +validates_presence_of+.
|
|
#
|
|
# Configuration options:
|
|
# * <tt>:message</tt> - A custom error message (default is: "is invalid")
|
|
# * <tt>:on</tt> - Specifies when this validation is active (default is <tt>:save</tt>, other options <tt>:create</tt>, <tt>:update</tt>)
|
|
# * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
|
|
# occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
|
|
# method, proc or string should return or evaluate to a true or false value.
|
|
# * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
|
|
# not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
|
|
# method, proc or string should return or evaluate to a true or false value.
|
|
def validates_associated(*attr_names)
|
|
configuration = { :message => ActiveRecord::Errors.default_error_messages[:invalid], :on => :save }
|
|
configuration.update(attr_names.extract_options!)
|
|
|
|
validates_each(attr_names, configuration) do |record, attr_name, value|
|
|
record.errors.add(attr_name, configuration[:message]) unless
|
|
(value.is_a?(Array) ? value : [value]).inject(true) { |v, r| (r.nil? || r.valid?) && v }
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end |