diff --git a/app/org/elastic4play/database/DBCreate.scala b/app/org/elastic4play/database/DBCreate.scala
index 9d3032e..4dc2fdf 100644
--- a/app/org/elastic4play/database/DBCreate.scala
+++ b/app/org/elastic4play/database/DBCreate.scala
@@ -1,29 +1,24 @@
 package org.elastic4play.database
 
-import javax.inject.{ Inject, Singleton }
-
-import scala.concurrent.{ ExecutionContext, Future }
-import scala.util.{ Failure, Success, Try }
+import javax.inject.{Inject, Singleton}
 
 import akka.stream.scaladsl.Sink
-
-import play.api.Logger
-import play.api.libs.json.{ JsNull, JsObject, JsString, JsValue }
-import play.api.libs.json.JsValue.jsValueToJsLookup
-
-import org.elasticsearch.action.index.IndexResponse
-import org.elasticsearch.transport.RemoteTransportException
-
-import com.sksamuel.elastic4s.ElasticDsl.{ bulk, index }
+import com.sksamuel.elastic4s.ElasticDsl.{bulk, index}
 import com.sksamuel.elastic4s.IndexAndTypes.apply
 import com.sksamuel.elastic4s.IndexDefinition
 import com.sksamuel.elastic4s.source.JsonDocumentSource
 import com.sksamuel.elastic4s.streams.RequestBuilder
-
-import org.elastic4play.{ CreateError, Timed }
 import org.elastic4play.models.BaseEntity
+import org.elastic4play.{ConflictError, CreateError, InternalError}
+import org.elasticsearch.action.index.IndexResponse
 import org.elasticsearch.index.engine.DocumentAlreadyExistsException
-import org.elastic4play.ConflictError
+import org.elasticsearch.transport.RemoteTransportException
+import play.api.Logger
+import play.api.libs.json.JsValue.jsValueToJsLookup
+import play.api.libs.json.{JsNull, JsObject, JsString, JsValue}
+
+import scala.concurrent.{ExecutionContext, Future}
+import scala.util.{Failure, Success, Try}
 
 /**
  * Service lass responsible for entity creation
@@ -171,14 +166,15 @@ class DBCreate @Inject() (
    * Class used to build index definition based on model name and attributes
    * This class is used by sink (ElasticSearch reactive stream)
    */
-  private class AttributeRequestBuilder(modelName: String) extends RequestBuilder[JsObject] {
+  private class AttributeRequestBuilder() extends RequestBuilder[JsObject] {
     override def request(attributes: JsObject): IndexDefinition = {
       val docSource = JsonDocumentSource(JsObject(attributes.fields.filterNot(_._1.startsWith("_"))).toString)
       val id = (attributes \ "_id").asOpt[String]
       val parent = (attributes \ "_parent").asOpt[String]
       val routing = (attributes \ "_routing").asOpt[String] orElse parent orElse id
+      val modelName = (attributes \ "_type").asOpt[String].getOrElse(throw InternalError("The entity doesn't contain _type attribute"))
       addId(id).andThen(addParent(parent)).andThen(addRouting(routing)) {
-        index into db.indexName → modelName doc docSource update true
+        index.into(db.indexName → modelName).doc(docSource).update(true)
       }
     }
   }
@@ -186,5 +182,5 @@ class DBCreate @Inject() (
   /**
    * build a akka stream sink that create entities
    */
-  def sink(modelName: String): Sink[JsObject, Future[Unit]] = db.sink(new AttributeRequestBuilder(modelName))
+  def sink(): Sink[JsObject, Future[Unit]] = db.sink(new AttributeRequestBuilder())
 }
\ No newline at end of file
diff --git a/app/org/elastic4play/services/MigrationSrv.scala b/app/org/elastic4play/services/MigrationSrv.scala
index 3da0a8d..34c3d8b 100644
--- a/app/org/elastic4play/services/MigrationSrv.scala
+++ b/app/org/elastic4play/services/MigrationSrv.scala
@@ -1,21 +1,21 @@
 package org.elastic4play.services
 
-import javax.inject.{ Inject, Singleton }
+import javax.inject.{Inject, Singleton}
 
 import akka.NotUsed
 import akka.stream.Materializer
-import akka.stream.scaladsl.{ Sink, Source }
+import akka.stream.scaladsl.{Sink, Source}
 import com.sksamuel.elastic4s.ElasticDsl.search
 import com.sksamuel.elastic4s.IndexesAndTypes.apply
 import org.elastic4play.InternalError
 import org.elastic4play.database._
 import play.api.Logger
 import play.api.libs.json.JsValue.jsValueToJsLookup
-import play.api.libs.json._
 import play.api.libs.json.Json.toJsFieldJsValueWrapper
+import play.api.libs.json._
 
-import scala.concurrent.{ ExecutionContext, Future }
-import scala.util.{ Failure, Success }
+import scala.concurrent.{ExecutionContext, Future}
+import scala.util.{Failure, Success}
 
 case class MigrationEvent(modelName: String, current: Long, total: Long) extends EventMessage
 case object EndOfMigrationEvent extends EventMessage
@@ -118,7 +118,7 @@ class MigrationSrv @Inject() (
         eventSrv.publish(MigrationEvent(modelName, current.toLong, total))
         entity
       }
-      .runWith(dbcreate.sink(modelName))
+      .runWith(dbcreate.sink())
     r.onComplete { x ⇒
       println(s"migrateEntity($modelName) has finished : $x")
     }
@@ -164,6 +164,7 @@ class MigrationSrv @Inject() (
   }
 
   def isMigrating: Boolean = !migrationProcess.isCompleted
+  def isReady: Boolean = dbindex.indexStatus && !migrationProcess.isCompleted
 }
 /* Operation applied to the previous state of the database to get next version */
 trait Operation extends ((String ⇒ Source[JsObject, NotUsed]) ⇒ (String ⇒ Source[JsObject, NotUsed]))