Scala 在Lift中定义MongoRecord,并在其内部定义地图
我找不到在Lift-MongoRecord中使用Map[String,String]字段定义MongoRecord的方法 电梯文件说明: 支持所有标准记录字段。还支持Mongo特定的类型;ObjectId、UUID、模式、列表和映射Scala 在Lift中定义MongoRecord,并在其内部定义地图,scala,mongodb,lift,Scala,Mongodb,Lift,我找不到在Lift-MongoRecord中使用Map[String,String]字段定义MongoRecord的方法 电梯文件说明: 支持所有标准记录字段。还支持Mongo特定的类型;ObjectId、UUID、模式、列表和映射 如何定义映射和列表字段?我定义了一个BsonRecordMapField: class BsonRecordMapField[OwnerType <: BsonRecord[OwnerType], SubRecordType <: BsonRecord[
如何定义映射和列表字段?我定义了一个BsonRecordMapField:
class BsonRecordMapField[OwnerType <: BsonRecord[OwnerType], SubRecordType <: BsonRecord[SubRecordType]]
(rec: OwnerType, valueMeta: BsonMetaRecord[SubRecordType])(implicit mf: Manifest[SubRecordType])
extends MongoMapField[OwnerType, SubRecordType](rec: OwnerType) {
import scala.collection.JavaConversions._
override def asDBObject: DBObject = {
val javaMap = new HashMap[String, DBObject]()
for ((key, element) <- value) {
javaMap.put(key.asInstanceOf[String], element.asDBObject)
}
val dbl = new BasicDBObject(javaMap)
dbl
}
override def setFromDBObject(dbo: DBObject): Box[Map[String, SubRecordType]] = {
val mapResult: Map[String, SubRecordType] = (for ((key, dboEl) <- dbo.toMap.toSeq) yield (key.asInstanceOf[String], valueMeta.fromDBObject(dboEl.asInstanceOf[DBObject]))).toMap
setBox(Full(mapResult))
}
override def asJValue = {
val fieldList = (for ((key, elem) <- value) yield JField(key, elem.asJValue)).toList
JObject(fieldList)
}
override def setFromJValue(jvalue: JValue) = jvalue match {
case JNothing | JNull if optional_? => setBox(Empty)
case JObject(fieldList) => val retrievedMap = fieldList.map {
field =>
val key = field.name
val valRetrieved = valueMeta.fromJValue(field.value) openOr valueMeta.createRecord
(key, valRetrieved)
}.toMap
setBox(Full(retrievedMap))
case other => setBox(FieldHelpers.expectedA("JObject", other))
}
}
这是Rogue的隐式查询:
class BsonRecordMapQueryField[M <: BsonRecord[M], B <: BsonRecord[B]](val field: BsonRecordMapField[M, B])(implicit mf: Manifest[B]) {
def at(key: String): BsonRecordField[M, B] = {
val listBox = field.setFromJValue(JObject(List(JField("notExisting", JInt(0)))))
val rec = listBox.open_!.head._2
new BsonRecordField[M, B](field.owner, rec.meta)(mf) {
override def name = field.name + "." + key
}
}
}
object ExtendedRogue extends Rogue {
implicit def bsonRecordMapFieldToBsonRecordMapQueryField[M <: BsonRecord[M], B <: BsonRecord[B]](f: BsonRecordMapField[M, B])(implicit mf: Manifest[B]): BsonRecordMapQueryField[M, B] = new BsonRecordMapQueryField[M, B](f) (mf)
}
您现在可以在映射中使用at运算符。我定义了一个BsonRecordMapField:
class BsonRecordMapField[OwnerType <: BsonRecord[OwnerType], SubRecordType <: BsonRecord[SubRecordType]]
(rec: OwnerType, valueMeta: BsonMetaRecord[SubRecordType])(implicit mf: Manifest[SubRecordType])
extends MongoMapField[OwnerType, SubRecordType](rec: OwnerType) {
import scala.collection.JavaConversions._
override def asDBObject: DBObject = {
val javaMap = new HashMap[String, DBObject]()
for ((key, element) <- value) {
javaMap.put(key.asInstanceOf[String], element.asDBObject)
}
val dbl = new BasicDBObject(javaMap)
dbl
}
override def setFromDBObject(dbo: DBObject): Box[Map[String, SubRecordType]] = {
val mapResult: Map[String, SubRecordType] = (for ((key, dboEl) <- dbo.toMap.toSeq) yield (key.asInstanceOf[String], valueMeta.fromDBObject(dboEl.asInstanceOf[DBObject]))).toMap
setBox(Full(mapResult))
}
override def asJValue = {
val fieldList = (for ((key, elem) <- value) yield JField(key, elem.asJValue)).toList
JObject(fieldList)
}
override def setFromJValue(jvalue: JValue) = jvalue match {
case JNothing | JNull if optional_? => setBox(Empty)
case JObject(fieldList) => val retrievedMap = fieldList.map {
field =>
val key = field.name
val valRetrieved = valueMeta.fromJValue(field.value) openOr valueMeta.createRecord
(key, valRetrieved)
}.toMap
setBox(Full(retrievedMap))
case other => setBox(FieldHelpers.expectedA("JObject", other))
}
}
这是Rogue的隐式查询:
class BsonRecordMapQueryField[M <: BsonRecord[M], B <: BsonRecord[B]](val field: BsonRecordMapField[M, B])(implicit mf: Manifest[B]) {
def at(key: String): BsonRecordField[M, B] = {
val listBox = field.setFromJValue(JObject(List(JField("notExisting", JInt(0)))))
val rec = listBox.open_!.head._2
new BsonRecordField[M, B](field.owner, rec.meta)(mf) {
override def name = field.name + "." + key
}
}
}
object ExtendedRogue extends Rogue {
implicit def bsonRecordMapFieldToBsonRecordMapQueryField[M <: BsonRecord[M], B <: BsonRecord[B]](f: BsonRecordMapField[M, B])(implicit mf: Manifest[B]): BsonRecordMapQueryField[M, B] = new BsonRecordMapQueryField[M, B](f) (mf)
}
您现在可以在映射中使用at运算符。关于什么?关于什么?这是您想要的吗?不,但是对象的映射,我在下面的答案中定义了它。这是您想要的吗?不,但是对象的映射,我在下面的答案中定义了它。我正在使用Rogue,并且MongoMapField未正确支持运算符的值。我构建的解决方案具有BSONRecordListField的所有优点和功能。我使用的是Rogue和MongoMapField,但operator不支持正确的值。我构建的解决方案具有BSonRecordListField的所有优点和功能。您能举一个关于at的恶意查询的例子吗?谢谢你。这真的很方便,谢谢你做了困难的部分!我将工作示例放在github上:您能给出一个关于at的恶意查询的示例吗?谢谢你。这真的很方便,谢谢你做了困难的部分!我将工作示例放在github上: