i am trying to write a text file using scala in play - scala

Question

i have attached my codes
Application (controller)
package controllers
import play.api._
import play.api.mvc._
import play.api.data._
import play.api.data.Forms._
import models.Task
import java.io._
object Application extends Controller {
val taskForm = Form(
tuple(
"id" -> number,
"label" -> nonEmptyText(minLength = 4),
"add" -> nonEmptyText
)
)
def index = Action {
Redirect(routes.Application.tasks)
}
def tasks = Action {
Ok(views.html.index(Task.all(),taskForm))
}
def showTask= Action {
Ok(views.html.test(Task.all(), taskForm))
}
def newTask = Action { implicit request =>
taskForm.bindFromRequest.fold(
errors => BadRequest(views.html.index(Task.all(), errors)),
{
case(id,label,add) => {
Task.create(id,label,add)
Redirect(routes.Application.showTask)
}
}
)
}
def deleteTask(id: Int) = Action {
Task.delete(id)
Redirect(routes.Application.showTask)
}
}
Task(model)
package models
import anorm._
import anorm.SqlParser._
import play.api.db._
import play.api.Play.current
case class Task(id: Int, label: String,add:String)
object Task {
val task = {
get[Int]("id") ~
get[String]("label") ~
get[String]("add") map {
case id~label~add => Task(id, label,add)
}
}
def all(): List[Task] = DB.withConnection { implicit c =>
SQL("select * from task").as(task *)
}
def create(id:Int , label: String, add:String) {
DB.withConnection { implicit c =>
SQL("insert into task (id,label,add) values ({id},{label},{add})").on(
'id -> id ,
'label -> label ,
'add -> add
).executeUpdate()
}
}
def delete(id:Int) {
DB.withConnection { implicit c =>
SQL("delete from task where id = {id}").on(
'id -> id
).executeUpdate()
}
}
}
I have no idea where to declare the writer function .please help me with the syntax also, I need to write the form elements into a text file .. Thankx in advance

Answer 1

Assuming that you want to append the text whenever a new task is added (i.e. newTask is invoked by Play).
You can define a helper function in object Application and use this helper method in your newTask method.
object Application extends Controller {
//...
import java.io.FileWriter
val filePath = """ path to file """
def writingToFile(str: String) = {
val fw = new FileWriter(filePath, true)
try {
fw.write(str)
} finally {
fw.close()
}
}
def newTask = Action { implicit request =>
taskForm.bindFromRequest.fold(
errors => BadRequest(views.html.index(Task.all(), errors)),
{
case(id,label,add) => {
/* Call the helper function to append to the file */
writingToFile(s"id : $id, label : $label, add : $add \n")
Task.create(id,label,add)
Redirect(routes.Application.showTask)
}
}
)
}
//..
}
Likewise when other methods are invoked you may append to the file in similar fashion.
Hope it helps :)