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Contents
# encoding: utf-8
module Mongoid
# Instantiates documents that came from the database.
module Factory
extend self
TYPE = "_type".freeze
# Builds a new +Document+ from the supplied attributes.
#
# @example Build the document.
# Mongoid::Factory.build(Person, { "name" => "Durran" })
#
# @param [ Class ] klass The class to instantiate from if _type is not present.
# @param [ Hash ] attributes The document attributes.
#
# @return [ Document ] The instantiated document.
def build(klass, attributes = nil)
attributes ||= {}
type = attributes[TYPE] || attributes[TYPE.to_sym]
if type && klass._types.include?(type)
type.constantize.new(attributes)
else
klass.new(attributes)
end
end
# Builds a new +Document+ from the supplied attributes loaded from the
# database.
#
# @example Build the document.
# Mongoid::Factory.from_db(Person, { "name" => "Durran" })
#
# @param [ Class ] klass The class to instantiate from if _type is not present.
# @param [ Hash ] attributes The document attributes.
# @param [ Array ] selected_fields If instantiated from a criteria using
# #only we give the document a list of the selected fields.
#
# @return [ Document ] The instantiated document.
def from_db(klass, attributes = nil, selected_fields = nil)
type = (attributes || {})[TYPE]
if type.blank?
klass.instantiate(attributes, selected_fields)
else
type.camelize.constantize.instantiate(attributes, selected_fields)
end
end
end
end
Version data entries
9 entries across 9 versions & 2 rubygems