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io.getquill.context.qzio

ImplicitSyntax

object ImplicitSyntax

Use to provide run(myQuery) calls with a context implicitly saving the need to provide things multiple times. For example in JDBC:

case class MyQueryService(ds: DataSource) {
  import Ctx._
  implicit val env = Implicit(Has(ds))

  val joes = Ctx.run(query[Person].filter(p => p.name == "Joe")).implicitly
  val jills = Ctx.run(query[Person].filter(p => p.name == "Jill")).implicitly
  val alexes = Ctx.run(query[Person].filter(p => p.name == "Alex")).implicitly
}

Normally you would have to do a separate provide for each clause:

val joes = Ctx.run(query[Person].filter(p => p.name == "Joe")).provide(Has(ds))
val jills = Ctx.run(query[Person].filter(p => p.name == "Jill")).provide(Has(ds))
val alexes = Ctx.run(query[Person].filter(p => p.name == "Alex")).provide(Has(ds))

For other contexts e.g. Cassandra the functionality is identical.

case class MyQueryService(cs: CassandraZioSession) {
  import Ctx._
  implicit val env = Implicit(cs)

  def joes = Ctx.run { query[Person].filter(p => p.name == "Joe") }.implicitly
  def jills = Ctx.run { query[Person].filter(p => p.name == "Jill") }.implicitly
  def alexes = Ctx.run { query[Person].filter(p => p.name == "Alex") }.implicitly
}
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  1. final case class Implicit[R](env: R) extends Product with Serializable

    A new type that indicates that the value R should be made available to the environment implicitly.

  2. implicit final class ImplicitSyntaxOps[R, E, A] extends AnyVal

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