scala-news-reader

Category.scala

(1291B)

 package com.joereader.model
 
 import field._
 import net.liftweb._
 import common._
 import record.field._
 import mongodb.record._
 import net.liftweb.mongodb.record.field._
 
 /**
  * Categories with a list of users that write for that category.
  */
 
 class Category private () extends MongoRecord[Category] {
   def meta = Category
 
   object id extends StringField(this.asInstanceOf[Category], 12) {
     override def name = "_id"
     override def defaultValue = "0"
     override def shouldDisplay_? = false
     override def setFilter = trim _ :: toLower _ :: super.setFilter
   }
   
   // Users that fall under this category
   object writers extends BlogWriterUserListField(this) {
     // remove category record if no users are listed
     override def remove(bwu: BlogWriterUser): Category = {
       super.remove(bwu)
       if(get.isEmpty) {owner.delete_!; owner} else owner
     }
   }
 
   override def update: Category = super.update
 }
 
 object Category extends Category with MongoMetaRecord[Category] {
   override def collectionName = "category.categories"
   override def find(in: String): Box[Category] = find(id.name, in)
 
   def random(n: Int): Seq[Category] = {
     val all = Category.findAll
     val random =
       Seq.fill(n)(scala.util.Random.nextInt(all.size)).distinct
     random.map(all)
   }
 }