longevity

A Persistence Framework for Scala and NoSQL

View project on GitHub

using the query dsl

To get started using the query DSL, we will look at a simple example of finding all blog posts for a blog. You simply need to import the query DSL from your persistent type:

import longevity.persistence.PState
import scala.concurrent.Future

val blog: Blog = getBlogFromSomewhere()

import BlogPost.queryDsl._

val allPosts: Future[Vector[PState[BlogPost]]] = repo.queryToVector(
  BlogPost.props.blogUri eqs blog.blogUri)

If you don’t want the DSL wildcard imports to infect other parts of your program, it is quite easy to localize them:

import longevity.persistence.PState
import scala.concurrent.Future

val blog: Blog = getBlogFromSomewhere()

val allPosts: Future[Vector[PState[BlogPost]]] = repo.queryToVector {
  import BlogPost.queryDsl._
  BlogPost.props.blogUri eqs blog.blogUri
}
prev: queries
up: queries
next: query filters