嗨，我正在尝试从类型安全激活器模板运行 hello-slick 示例，当它作为我自己的 sbt 项目运行时，它给了我错误，我只是复制粘贴代码，但它给了我错误
这是我的代码
HelloSlick.scala
import scala.slick.driver.H2Driver.simple._
// The main application
object HelloSlick extends App {
// The query interface for the Suppliers table
val suppliers: TableQuery[Suppliers] = TableQuery[Suppliers]
// the query interface for the Coffees table
val coffees: TableQuery[Coffees] = TableQuery[Coffees]
// Create a connection (called a "session") to an in-memory H2 database
val db = Database.forURL("jdbc:h2:mem:hello", driver = "org.h2.Driver")
db.withSession { implicit session =>
// Create the schema by combining the DDLs for the Suppliers and Coffees
// tables using the query interfaces
(suppliers.ddl ++ coffees.ddl).create
/* Create / Insert */
// Insert some suppliers
suppliers += (101, "Acme, Inc.", "99 Market Street", "Groundsville", "CA", "95199")
suppliers += ( 49, "Superior Coffee", "1 Party Place", "Mendocino", "CA", "95460")
suppliers += (150, "The High Ground", "100 Coffee Lane", "Meadows", "CA", "93966")
// Insert some coffees (using JDBC's batch insert feature)
val coffeesInsertResult: Option[Int] = coffees ++= Seq (
("Colombian", 101, 7.99, 0, 0),
("French_Roast", 49, 8.99, 0, 0),
("Espresso", 150, 9.99, 0, 0),
("Colombian_Decaf", 101, 8.99, 0, 0),
("French_Roast_Decaf", 49, 9.99, 0, 0)
)
val allSuppliers: List[(Int, String, String, String, String, String)] =
suppliers.list
// Print the number of rows inserted
coffeesInsertResult foreach { numRows =>
println(s"Inserted $numRows rows into the Coffees table")
}
/* Read / Query / Select */
// Print the SQL for the Coffees query
println("Generated SQL for base Coffees query:\n" + coffees.selectStatement)
// Query the Coffees table using a foreach and print each row
coffees foreach { case (name, supID, price, sales, total) =>
println(" " + name + "\t" + supID + "\t" + price + "\t" + sales + "\t" + total)
}
/* Filtering / Where */
// Construct a query where the price of Coffees is > 9.0
val filterQuery: Query[Coffees, (String, Int, Double, Int, Int)] =
coffees.filter(_.price > 9.0)
println("Generated SQL for filter query:\n" + filterQuery.selectStatement)
// Execute the query
println(filterQuery.list)
/* Update */
// Construct an update query with the sales column being the one to update
val updateQuery: Query[Column[Int], Int] = coffees.map(_.sales)
// Print the SQL for the Coffees update query
println("Generated SQL for Coffees update:\n" + updateQuery.updateStatement)
// Perform the update
val numUpdatedRows = updateQuery.update(1)
println(s"Updated $numUpdatedRows rows")
/* Delete */
// Construct a delete query that deletes coffees with a price less than 8.0
val deleteQuery: Query[Coffees,(String, Int, Double, Int, Int)] =
coffees.filter(_.price < 8.0)
// Print the SQL for the Coffees delete query
println("Generated SQL for Coffees delete:\n" + deleteQuery.deleteStatement)
// Perform the delete
val numDeletedRows = deleteQuery.delete
println(s"Deleted $numDeletedRows rows")
/* Selecting Specific Columns */
// Construct a new coffees query that just selects the name
val justNameQuery: Query[Column[String], String] = coffees.map(_.name)
println("Generated SQL for query returning just the name:\n" +
justNameQuery.selectStatement)
// Execute the query
println(justNameQuery.list)
/* Sorting / Order By */
val sortByPriceQuery: Query[Coffees, (String, Int, Double, Int, Int)] =
coffees.sortBy(_.price)
println("Generated SQL for query sorted by price:\n" +
sortByPriceQuery.selectStatement)
// Execute the query
println(sortByPriceQuery.list)
/* Query Composition */
val composedQuery: Query[Column[String], String] =
coffees.sortBy(_.name).take(3).filter(_.price > 9.0).map(_.name)
println("Generated SQL for composed query:\n" +
composedQuery.selectStatement)
// Execute the composed query
println(composedQuery.list)
/* Joins */
// Join the tables using the relationship defined in the Coffees table
val joinQuery: Query[(Column[String], Column[String]), (String, String)] = for {
c <- coffees if c.price > 9.0
s <- c.supplier
} yield (c.name, s.name)
println("Generated SQL for the join query:\n" + joinQuery.selectStatement)
// Print the rows which contain the coffee name and the supplier name
println(joinQuery.list)
/* Computed Values */
// Create a new computed column that calculates the max price
val maxPriceColumn: Column[Option[Double]] = coffees.map(_.price).max
println("Generated SQL for max price column:\n" + maxPriceColumn.selectStatement)
// Execute the computed value query
println(maxPriceColumn.run)
/* Manual SQL / String Interpolation */
// Required import for the sql interpolator
import scala.slick.jdbc.StaticQuery.interpolation
// A value to insert into the statement
val state = "CA"
// Construct a SQL statement manually with an interpolated value
val plainQuery = sql"select SUP_NAME from SUPPLIERS where STATE = $state".as[String]
println("Generated SQL for plain query:\n" + plainQuery.getStatement)
// Execute the query
println(plainQuery.list)
}
}
表.scala
import scala.slick.driver.H2Driver.simple._
import scala.slick.lifted.{ProvenShape, ForeignKeyQuery}
// A Suppliers table with 6 columns: id, name, street, city, state, zip
class Suppliers(tag: Tag)
extends Table[(Int, String, String, String, String, String)](tag, "SUPPLIERS") {
// This is the primary key column:
def id: Column[Int] = column[Int]("SUP_ID", O.PrimaryKey)
def name: Column[String] = column[String]("SUP_NAME")
def street: Column[String] = column[String]("STREET")
def city: Column[String] = column[String]("CITY")
def state: Column[String] = column[String]("STATE")
def zip: Column[String] = column[String]("ZIP")
// Every table needs a * projection with the same type as the table's type parameter
def * : ProvenShape[(Int, String, String, String, String, String)] =
(id, name, street, city, state, zip)
}
// A Coffees table with 5 columns: name, supplier id, price, sales, total
class Coffees(tag: Tag)
extends Table[(String, Int, Double, Int, Int)](tag, "COFFEES") {
def name: Column[String] = column[String]("COF_NAME", O.PrimaryKey)
def supID: Column[Int] = column[Int]("SUP_ID")
def price: Column[Double] = column[Double]("PRICE")
def sales: Column[Int] = column[Int]("SALES")
def total: Column[Int] = column[Int]("TOTAL")
def * : ProvenShape[(String, Int, Double, Int, Int)] =
(name, supID, price, sales, total)
// A reified foreign key relation that can be navigated to create a join
def supplier: ForeignKeyQuery[Suppliers, (Int, String, String, String, String, String)] =
foreignKey("SUP_FK", supID, TableQuery[Suppliers])(_.id)
}
构建.sbt
name :="hellos"
version :="1.0"
scalaVersion := "2.11.1"
mainClass in Compile := Some("HelloSlick")
libraryDependencies ++= List(
"com.typesafe.slick" %% "slick" % "2.1.0",
"org.slf4j" % "slf4j-nop" % "1.6.4",
"com.h2database" % "h2" % "1.3.170"
)
resolvers += "typesafe" at "http://repo.typesafe.com/typesafe/releases/"
当我将它作为 sbt 项目运行时，它给了我以下错误
[error] /opt/progrmas/sbt/hellos/src/main/scala/HelloSlick.scala:60: wrong number of type arguments for slick.driver.H2Driver.simple.Query, should be 3
[error] val filterQuery: Query[Coffees, (String, Int, Double, Int, Int)] =
[error] ^
[error] /opt/progrmas/sbt/hellos/src/main/scala/HelloSlick.scala:72: wrong number of type arguments for slick.driver.H2Driver.simple.Query, should be 3
[error] val updateQuery: Query[Column[Int], Int] = coffees.map(_.sales)
[error] ^
[error] /opt/progrmas/sbt/hellos/src/main/scala/HelloSlick.scala:86: wrong number of type arguments for slick.driver.H2Driver.simple.Query, should be 3
[error] val deleteQuery: Query[Coffees,(String, Int, Double, Int, Int)] =
[error] ^
[error] /opt/progrmas/sbt/hellos/src/main/scala/HelloSlick.scala:101: wrong number of type arguments for slick.driver.H2Driver.simple.Query, should be 3
[error] val justNameQuery: Query[Column[String], String] = coffees.map(_.name)
[error] ^
[error] /opt/progrmas/sbt/hellos/src/main/scala/HelloSlick.scala:112: wrong number of type arguments for slick.driver.H2Driver.simple.Query, should be 3
[error] val sortByPriceQuery: Query[Coffees, (String, Int, Double, Int, Int)] =
[error] ^
[error] /opt/progrmas/sbt/hellos/src/main/scala/HelloSlick.scala:124: wrong number of type arguments for slick.driver.H2Driver.simple.Query, should be 3
[error] val composedQuery: Query[Column[String], String] =
[error] ^
[error] /opt/progrmas/sbt/hellos/src/main/scala/HelloSlick.scala:137: wrong number of type arguments for slick.driver.H2Driver.simple.Query, should be 3
[error] val joinQuery: Query[(Column[String], Column[String]), (String, String)] = for {
[error] ^
[error] 7 errors found
[error] (compile:compile) Compilation failed
[error] Total time: 15 s, completed Aug 25, 2014 1:20:34 AM
>
请帮助我是 slick 的新手 我只是从教程中获得帮助并得到了这些错误它甚至不是我自己的代码这里是模板的链接 http://typesafe.com/activator/template/hello-slick