Use createIfNotExsists in Slick 3.3.0

Slick 3.3.0 is out and Lagom should move to it.

That will allow us to update the docs.

The example code:

def createTable = {
    MTable.getTables.flatMap { tables =>
      if (!tables.exists(_.name.name == postSummaries.baseTableRow.tableName)) {
        postSummaries.schema.create
      } else {
        DBIO.successful(())
      }
    }.transactionally
  }

as seen here:

https://www.lagomframework.com/documentation/current/scala/ReadSideSlick.html#Slick-Read-Side-support

Can be replacted by:

def createTable = postSummaries.schema.createIfNotExists

[alternegro]

createIfNotExists still tries to create indexes even if the tables exist

[ASchmidt84]

@leozilla I will try it. I think their is only a small change. At the underlying library (slick) could be added “if not exists” to the index creation process. That will also prevent of this bug.