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Lift Framework example source code file (MongoRefField.scala)
The Lift Framework MongoRefField.scala source code/* * Copyright 2011 WorldWide Conferencing, LLC * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package net.liftweb package mongodb package record package field import common.{Box, Empty, Full} import http.SHtml import util.Helpers._ import java.util.UUID import org.bson.types.ObjectId import net.liftweb.record.TypedField import net.liftweb.record.field._ /* * Trait for creating a Field for storing a "foreign key". Caches the * item after fetching. Implementations are available for ObjectId, UUID, String, * Int, and Long, but you can mix this into any Field. * * toForm produces a select form element. You just need to supply the * options by overriding the options method. */ trait MongoRefField[RefType <: MongoRecord[RefType], MyType] extends TypedField[MyType] { /** The MongoMetaRecord of the referenced object **/ def refMeta: MongoMetaRecord[RefType] /* * get the referenced object */ def obj = synchronized { if (!_calcedObj) { _calcedObj = true this._obj = valueBox.flatMap(v => refMeta.findAny(v)) } _obj } def cached_? : Boolean = synchronized { _calcedObj } def primeObj(obj: Box[RefType]) = synchronized { _obj = obj _calcedObj = true } private var _obj: Box[RefType] = Empty private var _calcedObj = false /** Options for select list **/ def options: List[(Box[MyType], String)] = Nil /** Label for the selection item representing Empty, show when this field is optional. Defaults to the empty string. */ def emptyOptionLabel: String = "" def buildDisplayList: List[(Box[MyType], String)] = { if (optional_?) (Empty, emptyOptionLabel)::options else options } private def elem = SHtml.selectObj[Box[MyType]]( buildDisplayList, Full(valueBox), setBox(_) ) % ("tabindex" -> tabIndex.toString) override def toForm = if (options.length > 0) uniqueFieldId match { case Full(id) => Full(elem % ("id" -> id)) case _ => Full(elem) } else Empty } class ObjectIdRefField[OwnerType <: BsonRecord[OwnerType], RefType <: MongoRecord[RefType]]( rec: OwnerType, rm: MongoMetaRecord[RefType] ) extends ObjectIdField[OwnerType](rec) with MongoRefField[RefType, ObjectId] { def refMeta = rm } class UUIDRefField[OwnerType <: BsonRecord[OwnerType], RefType <: MongoRecord[RefType]]( rec: OwnerType, rm: MongoMetaRecord[RefType] ) extends UUIDField[OwnerType](rec) with MongoRefField[RefType, UUID] { def refMeta = rm } class StringRefField[OwnerType <: BsonRecord[OwnerType], RefType <: MongoRecord[RefType]]( rec: OwnerType, rm: MongoMetaRecord[RefType], maxLen: Int ) extends StringField[OwnerType](rec, maxLen) with MongoRefField[RefType, String] { def refMeta = rm } class IntRefField[OwnerType <: BsonRecord[OwnerType], RefType <: MongoRecord[RefType]]( rec: OwnerType, rm: MongoMetaRecord[RefType] ) extends IntField[OwnerType](rec) with MongoRefField[RefType, Int] { def refMeta = rm } class LongRefField[OwnerType <: BsonRecord[OwnerType], RefType <: MongoRecord[RefType]]( rec: OwnerType, rm: MongoMetaRecord[RefType] ) extends LongField[OwnerType](rec) with MongoRefField[RefType, Long] { def refMeta = rm } Other Lift Framework examples (source code examples)Here is a short list of links related to this Lift Framework MongoRefField.scala source code file: |
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