couchrest_model/lib/couchrest/mixins/properties.rb

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module CouchRest
module Mixins
module DocumentProperties
def self.included(base)
base.extend(ClassMethods)
end
module ClassMethods
# Stores the class properties
def properties
@@properties ||= []
end
# This is not a thread safe operation, if you have to set new properties at runtime
# make sure to use a mutex.
def property(name, options={})
unless properties.map{|p| p.name}.include?(name.to_s)
property = CouchRest::Property.new(name, options.delete(:type), options)
create_property_getter(property)
create_property_setter(property) unless property.read_only == true
properties << property
end
end
protected
# defines the getter for the property
def create_property_getter(property)
meth = property.name
class_eval <<-EOS
def #{meth}
self['#{meth}']
end
EOS
if property.alias
class_eval <<-EOS
alias #{property.alias.to_sym} #{meth.to_sym}
EOS
end
end
# defines the setter for the property
def create_property_setter(property)
meth = property.name
class_eval <<-EOS
def #{meth}=(value)
self['#{meth}'] = value
end
EOS
if property.alias
class_eval <<-EOS
alias #{property.alias.to_sym}= #{meth.to_sym}=
EOS
end
end
end # module ClassMethods
end
end
end