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Contents
module ActiveModel
module Validations
class OwnershipValidator < EachValidator
def validate_each(record, attribute, value)
owner = record.send(options[:with])
actual_owner = value ? value.send(options[:with]) : nil
if value && owner != actual_owner
record.errors.add(
attribute, :invalid_owner,
:message => options[:message]
)
end
end
def check_validity!
raise ArgumentError, ":with is required" unless options.key?(:with)
raise ArgumentError, ":with option must be a string or a symbol" unless ["String", "Symbol"].include?(options[:with].class.name)
end
end
module ClassMethods
# Validates whether the owner of the specified attribute is the same from the current object.
#
# class Task < ActiveRecord::Base
# belongs_to :user
# belongs_to :category
#
# validates_ownership_of :category, :with => :user
# end
#
# user = User.find(1)
# another_user = User.find(2)
#
# user_category = user.categories.first
# another_user_category = another_user.categories.first
#
# task = user.tasks.create(:category => user_category)
# task.valid?
# #=> true
#
# task = user.tasks.create(:category => another_user_category)
# task.valid?
# #=> false
#
def validates_ownership_of(*attr_names)
validates_with OwnershipValidator, _merge_attributes(attr_names)
end
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems