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module Metasploit
module Model
# Registers before validation callback to convert the given attributes to `nil` if they are blank. This can be used
# to normalize empty attributes to NULL in the database so queries don't have to handle both `= ''` and `IS NULL`.
module NilifyBlanks
extend ActiveSupport::Concern
included do
include ActiveModel::Validations
include ActiveModel::Validations::Callbacks
before_validation :nilify_blanks
end
# Adds DSL methods once NilifyBlanks is included so that attributes where blanks should be changed to `nil` can be
# declared.
module ClassMethods
# Declares that `attributes` should be changed to `nil` before validation if they are blank.
#
# @param attributes [Enumerable<Symbol>] one or more attribute names
# @return [void]
def nilify_blank(*attributes)
nilify_blank_attribute_set.merge(attributes)
end
# Set of all attributes registered with {#nilify_blank}.
#
# @return [Set<Symbol>]
def nilify_blank_attribute_set
@nilify_blank_attribute_set ||= Set.new
end
end
#
# Instance Methods
#
# Before validation callback to change any attributes in {ClassMethods#nilify_blank_attribute_set} that are blank to
# `nil`.
#
# @return [void]
def nilify_blanks
self.class.nilify_blank_attribute_set.each do |attribute|
value = send(attribute)
if value.respond_to? :blank? and value.blank?
send("#{attribute}=", nil)
end
end
end
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems