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Versions: 22
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Contents
module CassandraObject
module AttributeMethods
module Typecasting
extend ActiveSupport::Concern
included do
class_attribute :attribute_definitions
self.attribute_definitions = {}
%w(array boolean date float integer json string time).each do |type|
instance_eval <<-EOV, __FILE__, __LINE__ + 1
def #{type}(*args)
options = args.extract_options!
args.each do |name|
attribute(name, options.merge(:type => :#{type}))
end
end
EOV
end
end
module ClassMethods
def inherited(child)
super
child.attribute_definitions = attribute_definitions.dup
end
#
# attribute :name, type: :string
# attribute :ammo, type: Ammo, coder: AmmoCodec
#
def attribute(name, options)
type = options[:type]
coder = options[:coder]
if type.is_a?(Symbol)
coder = CassandraObject::Type.get_coder(type) || (raise "Unknown type #{type}")
elsif coder.nil?
raise "Must supply a :coder for #{name}"
end
attribute_definitions[name.to_s] = AttributeMethods::Definition.new(name, coder, options)
end
def typecast_attribute(record, name, value)
if attribute_definition = attribute_definitions[name.to_s]
attribute_definition.instantiate(record, value)
else
raise NoMethodError, "Unknown attribute #{name.inspect}"
end
end
def coder_for(attribute)
attribute_definitions[attribute.to_s].coder
end
end
end
end
end
Version data entries
22 entries across 22 versions & 2 rubygems