Scala 22param 限制试图找到解决方法，但仍然用于理解而不是 Slick 中的普通 SQL

# 使用Scala解决Slick中的22个参数限制问题

scala
import slick.ast._
trait TupleOpsExtension {
  implicit def tupleOps[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23]
  (t: (Rep[A1], Rep[A2], Rep[A3], Rep[A4], Rep[A5], Rep[A6], Rep[A7], Rep[A8], Rep[A9], Rep[A10], Rep[A11], Rep[A12], Rep[A13], Rep[A14], Rep[A15], Rep[A16], Rep[A17], Rep[A18], Rep[A19], Rep[A20], Rep[A21], Rep[A22], Rep[A23])): TupleOps23[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23] =
    new TupleOps23(t)
}
class TupleOps23[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23]
  (val value: (Rep[A1], Rep[A2], Rep[A3], Rep[A4], Rep[A5], Rep[A6], Rep[A7], Rep[A8], Rep[A9], Rep[A10], Rep[A11], Rep[A12], Rep[A13], Rep[A14], Rep[A15], Rep[A16], Rep[A17], Rep[A18], Rep[A19], Rep[A20], Rep[A21], Rep[A22], Rep[A23]))
  extends AnyVal {
  def map[T](f: A23 => T): Rep[T] = {
    val t = value
    f(t._23)
  }
}

scala
import slick.lifted.TableQuery
import slick.jdbc.MySQLProfile.api._
case class MyTable23(
  field1: Int, field2: String, field3: Double, field4: Boolean,
  // ... (省略其他字段)
  field23: Long
)
class MyTable23Table(tag: Tag) extends Table[MyTable23](tag, "my_table_23") {
  def field1 = column[Int]("field1")
  def field2 = column[String]("field2")
  def field3 = column[Double]("field3")
  def field4 = column[Boolean]("field4")
  // ... (省略其他字段)
  def field23 = column[Long]("field23")
  def * = (field1, field2, field3, field4, field5, field6, field7, field8, field9, field10, field11, field12, field13, field14, field15, field16, field17, field18, field19, field20, field21, field22, field23).mapTo[MyTable23]
}
val myTable23Query = TableQuery[MyTable23Table]
val result = myTable23Query.filter(_.field1 === 42).map(_.field23).result.headOption
// 打印查询结果
result.onComplete {
  case Success(value) => println(s"Result: $value")
  case Failure(exception) => println(s"Query failed with exception: $exception")
}