Get object from form with errors in play framework 2.0

Question

I am getting an error when I try to extract a user from a form with validation errors.

I have the following route configured in my routes file:

GET     /users/:user            controllers.UsersController.viewUser(user: models.User)
GET     /users/:user/edit       controllers.UsersController.editUser(user: models.User)

This is fine at this point, and I can render a link to the user view from my scala templates:

routes.UsersController.viewUser(myUserObject)

My problem is that in my user edition form I need to get myUserObject from a Form[User] object. What I am currently doing is:

routes.UsersController.viewUser(userForm.get)

However, when the userForm has any errors, the get method raises an exception, as shown in the documentation .

The approach I have taken is passing an additional User parameter to the scala view, together with the Form[User] parameter I was passing up to now, I mean,

userEdit.render(user, userForm)

instead of just

userEdit.render(userForm)

However, I would like to know if there is a more suitable solution that does not involve including an additional parameter.

Answer 1

The documentation states that you can prefill a form with existing data:

val filledForm = userForm.fill(User("Bob", 18))

Given the preexisting User , it should be trivial to adapt to your example.