I have several templates in my play/scala project.
I want to get access to the currently logged in user in my main template.
(so that I can put a Welcome 'username' text on the top of the page on all templates not only the "logged in pages")
I could put a parameter in my main template:
#(user: User)
But I have several templates that reference to the main template that doesn't have access to the logged in user. Pages like about, contact etc.
The only templates that have access to the logged in user is the "logged in" pages. Like user profile, user settings. From there, I can pass the logged in User object to the main template. But from the other pages I can't.
If I make the parameter "user" in main template as an optional parameter it will be problems anyway since I'm going to use the logged in users data on all pages if a user is logged in.
How could I solve this?
Please tell me if you need more input.
You would need to use session to store id which you can use to identify the user, for example use user email as an id, from any action in controller retrieve user from db base on this id stored in session and pass 'username' as an Option to template, use option in case there is no logged in user, like this:
def about = Action { implicit request =>
val username:Option[String] = User.findUserName(request.session.get(userSession))
Ok(views.html.Applications.about(username)
}
example of about template, just pass username to main template
#(username:Option[String])
#main(username) {
// your content
}
example of main template display username if it is defined
#(username: Option[String])(content: Html)
#if(username.isDefined) {
<p> username.get</p>
}
If I understand you correctly, you need this:
Controller (Application.scala):
object Application extends Controller {
def index = Action {
val user = "smth" //assign your user name here
val parameter = "another parameter"
Ok(views.html.yourTemplate(user, parameter))
}
}
Template (yourTemplate.scala.html):
#(user: String, parameter: String)
<!--main template wrapping yourTemplate-->
#main("Welcome") {
<p>Hello, #user</p>
}
Related
I use dektrium user registration form.
registration link generates domain.com/user/register link
but it's not base user model, this module is located inside vendor/dektrium folder.
Now in base controllers folder I have UsersController with view action.
and after finishing registration I want to start view action of UsersController to view users page.
This is registration module code
public function actionRegister()
{
if (!$this->module->enableRegistration) {
throw new NotFoundHttpException;
}
$model = $this->module->manager->createRegistrationForm();
if ($model->load(\Yii::$app->request->post()) && $model->register()) {
return $this->redirect(array('users/'.$model->username));
}
return $this->render('register', [
'model' => $model
]);
}
As you can see I've put there this code
return $this->redirect(array('users/'.$model->username));
Which is supposed to take user to it's own page at domain.com/users/username.
But unfortunatelly url is forming in the following way
domain.com/user/users/username
How can I fix this problem and direct user to domain.com/users/username page ?
Add an extra / in front of the users redirect. it should be
return $this->redirect(array('/users/'.$model->username));
Or you should actually create the url the proper way, that would be the best way to do this, but I do not know the way you have your rules set up so I cannot help you there. I am just guessing here but it should be:
return $this->redirect(array('users/view, 'username' => $model->username));
In this way you are using your url manager, not just hardcoding the url. In the future if you decide to change the link it will be much easier (replace just the url line in your config) and not go in files to change it.
I'm trying to implement a user login form, I want to achieve:
when username doesn't exist in DB, return a flash message with previous
form data prefilled.
if any server side validation errors happened, return back to previous page, with old data pre-filled, display the errors
messages along side.
The problem now is, if I use flash scope, I need to use Redirect after post, but this will lose the pre-filled data.
If I use any status other than Redirect, I can't put data into flash scope.
What did I missing?
Don't use a Redirect for a failed login. You can return the same Form back to the login view with extra errors attached to it.
Something like this:
loginForm.bindFromRequest.fold(
formWithErrors => views.html.login(formWithErrors),
credentials => {
if(authenticate(credentials)) // dummy implementation
Redirect(controllers.Application.index)
else
BadRequest(views.html.login(loginForm.fill(credentials).withGlobalError("Incorrect login credentials")))
}
)
Then your view signature would look something like this:
#(loginForm: Form[Credentials])
#* Displays the first global error from the form, if any. *#
#loginForm.globalError.map{error =>
<h3>#error.message</h3>
}
And you'd pre-fill the form with values as before (I hope).
If there are multiple global errors, you can access them with globalErrors as it will access a Seq[FormError] instead of Option[FormError].
You can also attach errors to specific Form keys.
loginForm.withError("email", "I don't like your email.")
And would access them similarly:
#loginForm.error("email").map{ error =>
#error.message
}
You are using wrong concept, take a look to the Handling form submission doc, section: Validating a form in an Action
If form contains errors you are returning BadRequest (not Redirect)
If form IS valid anyway next check (i.e. DB query) returns an error you should do exactly the same thing as in formWithErrors so render the view passing incoming form to it (userData)
Finally if everything's OK, you can make your operation and redirect the user i.e. to main page or something...
Pseudo code (basing on doc):
def userPost = Action { implicit request =>
userForm.bindFromRequest.fold(
formWithErrors => {
BadRequest(views.html.user(formWithErrors))
},
userData => {
// Check whatever you need...
if (afterCheckSomethingIsWrong){
// if something's wrong fill the `userForm` with `userData` and render the same view again...
// You can use flash scope here i.e. for placing error message
BadRequest(views.html.user(userForm.fill(userData))).flashing("error" -> "The account doesn't exist")
} else {
// if everything is OK, redirect to some page, outside the form handling process, i.e. main page
Redirect(routes.Application.index).flashing("success" -> "Fine you're logged now")
}
}
)
}
I have two tables : Users & Profiles. A user has one profile (1:1), a profile can be affected to many users, each profile has many modules, each module has many actions.
I'm sending this object from an asmx to a aspx page using a direct service call.
I got an error because of lazy loading ... so I disabled the lazy loading.
this.Configuration.LazyLoadingEnabled = false;
this works fine, I got my user, with the profile null.
To build the menu tree I have to retrieve the profile. I included It :
User user = new User();
using (cduContext db = new cduContext())
{
// get the user
string encryptedPassword = Encryption.Encrypt(password);
user = (from u in db.Users
where u.UserName.Equals(login) &&
u.Password.Equals(encryptedPassword)
select u).FirstOrDefault();
// Include the users profile
user = db.Users.Include("Profile").FirstOrDefault();
}
return user;
I got this error in the javascript call function :
A circular reference was detected while serializing an object of type 'CDU.Entities.Models.User'.
When I made a quick watch on the user object, in asmx ( before sending it ) , I found, that the profile has included the list of the users who had this pofile, each user has his profile loaded ... etc
Any idea please ?
Note, your code should look like this:
using (cduContext db = new cduContext())
{
// get the user
string encryptedPassword = Encryption.Encrypt(password);
var user = from u in db.Users
where u.UserName.Equals(login) &&
u.Password.Equals(encryptedPassword)
select u;
// Include the users profile
return user.Include("Profile").FirstOrDefault();
}
In your code, you were throwing away the first query by overwriting it with the second. And there was no valid reason to create a blank user.
To address your problem, you're going to have make a decision on what you don't want to serialize. In your case, you probably don't want to serialize Profile.Users
You don't mention what serializer you're using. I'm assuming you're using the DataContract serializer?
EDIT:
You would mark your Profile.Users object with the [IgnoreDataMember] Attribute.
I have a web application in Play. The web application consists of several pages. In every page there is a small flag that enables the user to change the language (locale) from german to english and back.
I handle this with a redirect to referer:
def referer(implicit request: Request[AnyContent]) =
request.headers.get(REFERER).getOrElse(mainUrl)
def locale(l: String) = Authenticated { user =>
implicit request =>
Redirect(referer).withCookies(Cookie(LANG, if (l == "de" || l == "en") l else "de"))
}
It is working fine. Well, at least for GET requests.
I have a specific page where the user has to input data in a form. This form is then POSTed to the server. Were errors found, the form is displayed again with the error messages, as usual. Now, if the user wants to change the language (by clicking on the flag), the redirect to referer does not work, because it tries to use a GET request, and Play complains that a GET route does not exist for this method (which is true).
I am solving this by caching the form and defining another method where the form is taken from the cache:
# User data is POSTed to the server
POST /create/insert controllers.MyCreate.insert()
# After a redirect the cached form is displayed again
GET /create/insert controllers.MyCreate.insertGet()
It works, but I don't like this solution. It does not seem normal to have to create another entry in the routes and another method just to adress this problem. I would need to add this hack for every POST route in my application!
Is there a more elegant solution to this?
You could change it into something like this (untested):
def changeLang(lang:String, returnUri:String) = Action {
Redirect(returnUri)
.withCookies(Cookie(LANG, if (lang == "de" || lang == "en") lang else "de"))
}
In you template you would output the route to changeLang in the link, you can get the uri via the request
#routes.Application.changeLang("en", request.uri).url
I suggest you make request implicit in your action and define it as implicit in your template so you don't need to pass it on to each template.
// in the controller
def myUrl = Action { implicit request =>
Ok(views.html.myTemplate("something"))
}
// in the template
#(title:String)(implicit request:play.api.mvc.RequestHeader)
Edit
As for the POST requests, it common (for these types of framework) to have POST requests simple handle stuff and then redirect to another page. The usual flow is like this:
Form submits to a handler
Handler does something with the form information
Handler redirects to a page
An example:
// Hooked up to a GET route
def edit(id:Long) = Action {
// render the view with a form that displays the element with given id
// if the flash scope contains validation information, use that in display
}
// Hooked up to a POST route
def editHandler = Action {
// validate the form
// if validation succeeds
// persist the object
// redirect to edit
// else
// put the form information into the flash scope
// put any validation messages into the flash scope
// redirect to edit
}
If you do not want to use this flow you need to have both a GET and POST route anyway. The user might do a page reload on the resulting page.
I am a newbie to Zend and creating a simple signup form but which has many fields. So I want to create a confirm page after the user signup action.
this is how my flow goes:
signup -> confirm ->success/error
My main reason for having a separate confirm form page is the data fields are so many so the user must go through to make sure they are all correctly filled.
using forms signup and confirm (with field disabled), I want to know if there is a way to pass the data from the signup form to confirm form?
Please any helpful ideas and suggestions welcomed
;)
public function signupAction()
{
$users = new Application_Model_Users();
$form = new Application_Form_RegistrationForm();
$this->view->form=$form;
if($this->getRequest()->isPost()){
if($form->isValid($_POST)){
$data = $form->getValues();
//some checks before sending data to confirm page
//not sure how the data can be passed to the confirm page from here
$this->_redirect('auth/confirmsignup');
}
}
}
public function confirmsignupAction()
{
$users = new Application_Model_Users();
$form = new Application_Form_ConfirmRegistrationForm();
$this->view->form=$form;
if($this->getRequest()->isPost()){
if($form->isValid($_POST)){
$data = $form->getValues();
//some checks before
unset($data['confirmPassword']);
$users->insert($data);
$this->_redirect('auth/login');
}
}
}
When redirecting, you will lose the POST data, unless:
You store it in session in signup and then read in confirmsignup
You don't redirect at all. Instead, after first submit check for existence of special data in your form, it may be a random token like hash of session id etc., but not easily guessable like "confirm=1". If the token does not exist, add a hidden field with this token to your form and show it to the user again in the same action, with data filled in - this will be the confirmation phase. If you have a POST in signup again, you will receive the token and by checking it exists, you will know this is the second submit with confirmation and you may proceed with the signup. I hope I didn't overcomplicate this.