We-Eat/server/app/com/weEat/migrations/RestoreFromFile.scala

package com.weEat.migrations

import com.weEat.models.Collectable
import org.mongodb.scala.MongoDatabase
import scala.io.Source
import scala.concurrent.Future
import scala.reflect.ClassTag
import play.api.libs.json.{Reads,Json}
import scala.jdk.StreamConverters._

case class RestoreFromFile[T](
  f: Source,
  col: Collectable[T]
)(implicit
  tag: ClassTag[T],
  reads: Reads[Seq[T]]
) extends Migration {
  def execute(db: MongoDatabase) = db.getCollection[T](col.collectionName)
    .insertMany(Json.parse(f.mkString).as[Seq[T]])
    .toFuture()
}