tundsta / play-scala-todolist

This is your new Play application

This file will be packaged with your application, when using play dist.

HTML structure

'app/views/index.scala.html' calls 'app/views/main.scala.html' which displays the HTML layout.

Reverse Routing

Generate URLs programmatically from calls to the routes controller

Redirect(routes.Application.tasks())

Data Binding

Binding a form in a view template

@inputText(taskForm("label"))

Binding form data in an Action via the request

def newTask = Action { implicit request =>
    taskForm.bindFromRequest.fold(
      errors => BadRequest(views.html.index(Task.all, errors)),
      label => {
        Task.create(label)
        Redirect(routes.Application.tasks())
      }
    )
  }

fold provides a mechanism to handle errors and success cases

Database Schema Migration

Play evolutions provides an sql script-based mechanism to migrate schemas inline with application development. Migration scripts are versioned '1.sql' '2.sql' etc and support a rollback facility:

# --- !Ups

CREATE SEQUENCE task_id_seq;
CREATE TABLE task (
    id integer NOT NULL DEFAULT nextval('task_id_seq'),
    label varchar(255)
);
 
# --- !Downs
 
DROP TABLE task;
DROP SEQUENCE task_id_seq;