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UnionTest.scala
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UnionTest.scala
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package com.typesafe.slick.testkit.tests
import com.typesafe.slick.testkit.util.{AsyncTest, RelationalTestDB}
import scala.collection.mutable
class UnionTest extends AsyncTest[RelationalTestDB] {
import tdb.profile.api._
class Managers(tag: Tag) extends Table[(Int, String, String)](tag, "managers") {
def id = column[Int]("id")
def name = column[String]("name")
def department = column[String]("department")
def * = (id, name, department)
}
lazy val managers = TableQuery[Managers]
class Employees(tag: Tag) extends Table[(Int, String, Int)](tag, "employees") {
def id = column[Int]("id")
def name = column[String]("name2")
def manager = column[Int]("manager")
def * = (id, name, manager)
// A convenience method for selecting employees by department
def departmentIs(dept: String) = manager in managers.filter(_.department === dept).map(_.id)
}
lazy val employees = TableQuery[Employees]
def managersQuery = for(m <- managers filter { _.department === "IT" }) yield (m.id, m.name)
def employeesQuery = for(e <- employees filter { _.departmentIs("IT") }) yield (e.id, e.name)
val managersData = Seq(
(1, "Peter", "HR"),
(2, "Amy", "IT"),
(3, "Steve", "IT")
)
val employeesData = Seq(
(4, "Jennifer", 1),
(5, "Tom", 1),
(6, "Leonard", 2),
(7, "Ben", 2),
(8, "Greg", 3)
)
def testBasicUnions = {
val q1 = managersQuery
val q2 = employeesQuery
val q3 = (q1 union q2).sortBy(_._2.asc)
val q4 = managers.map(_.id)
val q4b = q4 union q4
val q4c = q4 union q4 union q4
val q5 = managers.map(m => (m.id, 0)) union employees.map(e => (e.id, e.id))
(for {
_ <- (managers.schema ++ employees.schema).create
_ <- managers ++= managersData
_ <- employees ++= employeesData
_ <- mark("q1", q1.result).map(r => r.toSet shouldBe Set((2,"Amy"), (3,"Steve")))
_ <- mark("q2", q2.result).map(r => r.toSet shouldBe Set((7,"Ben"), (8,"Greg"), (6,"Leonard")))
_ <- mark("q3", q3.result).map(_ shouldBe List((2,"Amy"), (7,"Ben"), (8,"Greg"), (6,"Leonard"), (3,"Steve")))
_ <- mark("q4b", q4b.result).map(r => r.toSet shouldBe Set(1, 2, 3))
_ <- mark("q4c", q4c.result).map(r => r.toSet shouldBe Set(1, 2, 3))
_ <- mark("q5", q5.result).map(r => r.toSet shouldBe Set((7,7), (6,6), (2,0), (4,4), (3,0), (8,8), (5,5), (1,0)))
} yield ()) andFinally (managers.schema ++ employees.schema).drop
}
def testUnionWithLimit = {
val q1 = managersQuery
val q2 = employeesQuery.sortBy(_._2.asc)
val union = (q1 ++ q2.take(1)).sortBy(_._2.asc)
(for {
_ <- (managers.schema ++ employees.schema).create
_ <- managers ++= managersData
_ <- employees ++= employeesData
_ <- mark("union", union.result).map(_ shouldBe List((2,"Amy"),(7,"Ben"),(3,"Steve")))
} yield ()) andFinally (managers.schema ++ employees.schema).drop
}
def testUnionWithoutProjection = {
def f (s: String) = managers filter { _.name === s}
val q = f("Peter") union f("Amy")
seq(
managers.schema.create,
managers ++= managersData,
q.result.map(r => r.toSet shouldBe Set((1, "Peter", "HR"), (2, "Amy", "IT")))
) andFinally managers.schema.drop
}
def testUnionOfJoins = {
class Drinks(tag: Tag, tableName: String) extends Table[(Long, Long)](tag, tableName) {
def pk = column[Long]("pk")
def pkCup = column[Long]("pkCup")
def * = (pk, pkCup)
}
val coffees = TableQuery(new Drinks(_, "Coffee"))
val teas = TableQuery(new Drinks(_, "Tea"))
val q1 = for {
coffee <- coffees
tea <- teas if coffee.pkCup === tea.pkCup
} yield (coffee.pk, coffee.pkCup)
val q2 = for {
coffee <- coffees
tea <- teas if coffee.pkCup === tea.pkCup
} yield (tea.pk, tea.pkCup)
val q3 = q1 union q2
seq(
(coffees.schema ++ teas.schema).create,
coffees ++= Seq(
(10L, 1L),
(20L, 2L),
(30L, 3L)
),
teas ++= Seq(
(100L, 1L),
(200L, 2L),
(300L, 3L)
),
q1.result.map(r => r.toSet shouldBe Set((10L, 1L), (20L, 2L), (30L, 3L))),
q2.result.map(r => r.toSet shouldBe Set((100L, 1L), (200L, 2L), (300L, 3L))),
q3.result.map(r => r.toSet shouldBe Set((10L, 1L), (20L, 2L), (30L, 3L), (100L, 1L), (200L, 2L), (300L, 3L)))
)
}
def testCountWithUnion = {
case class Delivery(id: Long, dname: String, messageId: Long, sentAt: Long)
case class Message(id: Long, mname: String, mbody: String)
class Deliveries(tag: Tag) extends Table[Delivery](tag, "d2") {
val id = column[Long]("delivery_id")
val dname = column[String]("dname")
val messageId = column[Long]("message_id")
val sentAt = column[Long]("sent_at")
def * = (id, dname, messageId, sentAt) <> (Delivery.tupled, Delivery.unapply)
}
class Messages(tag: Tag) extends Table[Message](tag, "m2") {
val id = column[Long]("message_id")
val mname = column[String]("mname")
val mbody = column[String]("mbody")
def * = (id, mname, mbody) <> (Message.tupled, Message.unapply)
}
def leftSide = {
(for {
d <- TableQuery[Deliveries]
m <- TableQuery[Messages] if d.messageId === m.id
} yield (d, m))
.filter { case (d, m) => d.sentAt >= 1400000000L }
}
def rightSide = {
(for {
d <- TableQuery[Deliveries]
m <- TableQuery[Messages] if d.messageId === m.id
} yield (d, m))
.filter { case (d, m) => d.sentAt < 1400000000L }
}
val query =
leftSide.union(rightSide).length
DBIO.seq(
TableQuery[Deliveries].schema.create,
TableQuery[Messages].schema.create,
mark("q", query.result).map(_ shouldBe 0)
)
}
def testCountWithUnionAndSort = {
case class Delivery(id: Long, dname: String, sentAt: Long)
class Deliveries(tag: Tag) extends Table[Delivery](tag, "d") {
val id = column[Long]("delivery_id")
val dname = column[String]("dname")
val sentAt = column[Long]("sent_at")
def * = (id, dname, sentAt) <> (Delivery.tupled, Delivery.unapply)
}
def leftSide = {
TableQuery[Deliveries].filter(_.sentAt >= 1400000000L)
}
def rightSide = {
TableQuery[Deliveries].filter(_.sentAt < 1400000000L)
}
val query =
leftSide.union(rightSide).sortBy(_.id.desc).length
DBIO.seq(
TableQuery[Deliveries].schema.create,
mark("q", query.result).map(_ shouldBe 0)
)
}
def testMappedUnion = {
class T(tag: Tag) extends Table[(String, Int, String, Int)](tag, "t".withUniquePostFix) {
def a = column[String]("a")
def b = column[Int]("b")
def c = column[String]("c")
def d = column[Int]("d")
def e = column[String]("e")
def * = (a, b, c, d)
override def create_* = collectFieldSymbols((*, e).shaped.toNode)
}
val ts = TableQuery[T]
val q1 = ts.filter(_.a === "a") ++ ts.filter(_.e === "e")
DBIO.seq(
ts.schema.create,
ts.map(f => (f.a, f.b, f.c, f.d, f.e)) += (("a", 1, "c", 3, "e")),
q1.result.map(_ shouldBe Vector(("a",1,"c",3), ("a",1,"c",3)))
)
}
def testInUnion = {
class T(tag: Tag) extends Table[(String, Int)](tag, "t") {
def id = column[String]("id")
def data = column[Int]("data")
def * = (id, data)
}
val ts = TableQuery[T]
val q1 = ts.filter(_.data.in((ts.filter(_.id === "a") ++ ts.filter(_.id === "c")).map(_.data)))
DBIO.seq(
ts.schema.create,
ts.map(f => (f.id, f.data)) ++= Seq(("a", 1), ("b", 2), ("c", 1), ("d", 1)),
q1.result.map(_ shouldBe Vector(("a", 1), ("c", 1), ("d", 1)))
)
}
}