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# 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, criteria = nil) selected_fields = criteria.options[:fields] if criteria type = (attributes || {})[TYPE] if type.blank? obj = klass.instantiate(attributes, selected_fields) if criteria && criteria.association && criteria.parent_document obj.set_relation(criteria.association.inverse, criteria.parent_document) end obj else camelized = type.camelize begin camelized.constantize.instantiate(attributes, selected_fields) rescue NameError raise Errors::UnknownModel.new(camelized, type) end end end end end
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13 entries across 13 versions & 1 rubygems