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Contents
# encoding: utf-8
module Mongoid #:nodoc
module Fields #:nodoc
extend ActiveSupport::Concern
included do
# Set up the class attributes that must be available to all subclasses.
# These include defaults, fields
class_inheritable_accessor :fields
self.fields = {}
delegate :defaults, :fields, :to => "self.class"
end
module ClassMethods #:nodoc
# Defines all the fields that are accessable on the Document
# For each field that is defined, a getter and setter will be
# added as an instance method to the Document.
#
# Options:
#
# name: The name of the field, as a +Symbol+.
# options: A +Hash+ of options to supply to the +Field+.
#
# Example:
#
# <tt>field :score, :default => 0</tt>
def field(name, options = {})
access = name.to_s
set_field(access, options)
attr_protected name if options[:accessible] == false
end
# Returns the default values for the fields on the document
def defaults
fields.inject({}) do |defs,(field_name,field)|
next(defs) if field.default.nil?
defs[field_name.to_s] = field.default
defs
end
end
protected
# Define a field attribute for the +Document+.
def set_field(name, options = {})
meth = options.delete(:as) || name
fields[name] = Field.new(name, options)
create_accessors(name, meth, options)
add_dirty_methods(name)
end
# Create the field accessors.
def create_accessors(name, meth, options = {})
define_method(meth) { read_attribute(name) }
define_method("#{meth}=") { |value| write_attribute(name, value) }
define_method("#{meth}?") do
attr = read_attribute(name)
(options[:type] == Boolean) ? attr == true : attr.present?
end
end
end
end
end
Version data entries
14 entries across 14 versions & 2 rubygems