Lift Framework example source code file (ManyToManySpecs.scala)

This example Lift Framework source code file (ManyToManySpecs.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lift Framework tags/keywords

company, company, idpk, longkeyedmapper, longkeyedmetamapper, manytomany, manytomany, mappedlongforeignkey, metamapper, person, person, personcompany, personcompany, specification

The Lift Framework ManyToManySpecs.scala source code

/*
 * Copyright 2009-2011 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 mapper

import org.specs.Specification

/**
 * Systems under specification for ManyToMany.
 */
object ManyToManySpec extends Specification("ManyToMany Specification") {

  val provider = DbProviders.H2MemoryProvider
  
  private def ignoreLogger(f: => AnyRef): Unit = ()
  def setupDB {
    MapperRules.createForeignKeys_? = c => false
    provider.setupDB
    Schemifier.destroyTables_!!(ignoreLogger _,  PersonCompany, Company, Person)
    Schemifier.schemify(true, ignoreLogger _, Person, Company, PersonCompany)
  }
  def createPerson = {
    val person = new Person
    person.save
    val companies = (1 to 10).toList map { i =>
      val c = new Company
      c.name ()= i.toString
      c.save
      c
    }
    person.companies ++= companies
    person.save
    // Break some joins
    companies(3).delete_! // delete "4"
    companies(6).delete_! // delete "7"
    person.companies.refresh  // reload joins so joinEntity.company.obj isn't cached
    person
  }

  "ManyToMany" should {
    "skip broken joins in children" in {
      setupDB
      val person = createPerson
      person.companies.joins.length must_== 10
      person.companies.all.length must_== 8
    }
    "handle missing joins in insertAll" in {
      setupDB
      val person = createPerson
      val c = new Company
      c.name ()= "new"
      c.save
      person.companies.insertAll(7, Seq(c))
      person.companies(7).name.is must_== "new"
    }


// from Florian

    "count unsaved children" in {
      setupDB
      val person = new Person
      val company = new Company
      person.companies += company
      person.companies.length must_== 1
    }
    "count saved children" in {
      setupDB
      val person = new Person
      val company = new Company
      company.save
      person.companies += company
      person.companies.length must_== 1
    }
//     "count unsaved children of a saved entity" in {
//       setupDB
//       val person = new Person
//       val company = new Company
//       person.companies += company
//       person.save
//       person.companies.length must_== 1
//     }
    "count saved children of a saved entity" in {
      setupDB
      val person = new Person
      val company = new Company
      company.save
      person.companies += company
      person.save
      person.companies.length must_== 1
    }
    "count saved children of a saved entity after refresh" in {
      setupDB
      val person = new Person
      person.save
      val company = new Company
      company.save
      person.companies += company
      person.save
      person.companies.refresh
      person.companies.length must_== 1
    }
  }

}



class Person extends LongKeyedMapper[Person] with IdPK with ManyToMany {
  def getSingleton = Person
  object companies extends MappedManyToMany(PersonCompany, PersonCompany.person, PersonCompany.company, Company)
}
object Person extends Person with LongKeyedMetaMapper[Person]

class Company extends LongKeyedMapper[Company] with IdPK {
  def getSingleton = Company
  object name extends MappedString(this, 10)
}
object Company extends Company with LongKeyedMetaMapper[Company]

class PersonCompany extends Mapper[PersonCompany] {
  def getSingleton = PersonCompany
  object person extends MappedLongForeignKey(this, Person)
  object company extends MappedLongForeignKey(this, Company)

  override def toString = "PersonCompany(person.is=%s, person.obj=%s, company.is=%s, company.obj=%s)".format(person.is,person.obj,company.is,company.obj)
}
object PersonCompany extends PersonCompany with MetaMapper[PersonCompany]