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Contents
# TODO:
# - spec module
# - spec that validator ignores records with the same id
module HerExtension
module Validations
# Validate the uniqueness of a field by performing a remote API call
class RemoteUniquenessValidator < ::ActiveModel::EachValidator
def validate_each(record,attribute,value)
list = record.class.where({ attribute => value }).limit(1)
if list.reject { |e| e.id == record.id }.any?
error_options = options.except(:case_sensitive, :scope, :conditions)
error_options[:value] = value
record.errors.add(attribute, :taken, error_options)
end
end
end
# This module overrides validates_uniqueness_of
module RemoteUniquenessValidation
def self.included(base)
base.extend(ClassMethods)
end
module ClassMethods
def validates_uniqueness_of(*attr_names)
validates_with RemoteUniquenessValidator, _merge_attributes(attr_names)
end
end
end
end
end
Version data entries
30 entries across 30 versions & 1 rubygems