lift-mongo-record出错

BookMongo.scala

package com.lshoo.model

import net.liftweb._
import record.field._
import mongodb.record.{MongoRecord, MongoMetaRecord, MongoId}
import mongodb.{JsonObject, JsonObjectMeta}
import mongodb.record.field._

object BookMongo extends BookMongo with MongoMetaRecord[BookMongo]

class BookMongo private extends MongoRecord[BookMongo] with MongoId[BookMongo]{
	def meta = BookMongo
	
	object title extends StringField(this, "")
	object publisherInYear extends IntField(this, 1990)
	
	object publisher extends JsonObjectField[BookMongo, PublisherMongo](this, PublisherMongo) {
	  def defaultValue = PublisherMongo("", "")
	}
	
	object authors extends MongoJsonObjectListField[BookMongo, AuthorMongo](this, AuthorMongo)
}

case class PublisherMongo(name: String, description: String)
	extends JsonObject[PublisherMongo] {
	
    def meta = PublisherMongo
}

object PublisherMongo extends JsonObjectMeta[PublisherMongo]

case class AuthorMongo (firstName: String,
    lastName: String) extends JsonObject[AuthorMongo] {
	def meta = AuthorMongo
} 

object AuthorMongo extends JsonObjectMeta[AuthorMongo]

scala> BookMongo.createRecord.title("sample").authors(AuthorMongo(List(AuthorMon
go("tim", "perrett")))).publisher(PublisherMongo("Manning","")).save
执行时出错：
<console>:11: error: not enough arguments for method apply: (firstName: String,
lastName: String)com.lshoo.model.AuthorMongo in object AuthorMongo.
Unspecified value parameter lastName.
              BookMongo.createRecord.title("sample").authors(AuthorMongo(List(AuthorMongo("tim", "perrett")))).publisher(PublisherMongo("Manning","")).save
                                                                        ^
是何原因？

经验证，修改后应该是：

scala> BookMongo.createRecord.title("sample").authors(List(AuthorMongo("tim", "p
errett"))).publisher(PublisherMongo("Manning","")).save
JRebel: Reloading class 'com.lshoo.model.BookMongo$'.
JRebel: Reloading class 'com.lshoo.model.BookMongo'.
JRebel: Reloading class 'com.lshoo.model.BookMongo$authors$'.
JRebel: Reloading class 'com.lshoo.model.AuthorMongo$'.
JRebel: Reloading class 'com.lshoo.model.AuthorMongo'.
JRebel: Reloading class 'com.lshoo.model.BookMongo$publisher$'.
JRebel: Reloading class 'com.lshoo.model.PublisherMongo$'.
JRebel: Reloading class 'com.lshoo.model.PublisherMongo'.
JRebel: Reloading class 'com.lshoo.model.BookMongo$title$'.
JRebel: Reloading class 'com.lshoo.model.BookMongo$publisherInYear$'.
res14: com.lshoo.model.BookMongo = class com.lshoo.model.BookMongo={_id=4f7078c2
694679051cc69146, authors=List(AuthorMongo(tim,perrett)), publisher=PublisherMon
go(Manning,), title=sample, publisherInYear=1990}