def submit(id: PostId) = Action { implicit request =>
    postContentForm.bindFromRequest.fold(
      formWithErrors => BadRequest(views.html.posts.edit(id, formWithErrors)),
      postContent => {
        commit(PostEdited(id, postContent))
        Redirect(routes.PostsController.show(id)).flashing("info" -> "Post saved.")
      })
  }