使用Atk4从数据库加载数据

Question

To be hones working with Atk4 is a great adventure for such a rookie as I am. and now i have really a problem i can't solve by myself. I have two tables in MySQL database. The first one is named user (id, username, email) and the second one is named trips (id, user_id, name). I have made a login and register form for users. I want a logged user to be able to see it's own trips. I used to make this thing for its profile information using the following code:

<?php
class page_userprofile extends Page{
    function init(){
    parent::init();
    $this->api->auth->check();
    $model = $this->add('Model_user');
    $this->add('FormAndSave')->setModel($model)->loadData($this->api->auth->get('id'));

}
}

I have to do something similar with Model_trips but I do not know what. i have tried with that example from Atk4 website:

// Traverse foreign keys. Automatically loads proper model and data
$company=$emp->getRef('company_id');

This is the last code I have written:

<?php
class page_mytrips extends Page{
    function init(){
    parent::init();

    $this->api->auth->check();
    $model = $this->add('Model_trips');
    $this->add('FormAndSave')->setModel($model)->loadData($this->getRef('user_id'));

 }
}

Answer 1

You are very close:

$model = $this->add('Model_trips');
$model->setMasterField('user_id', $this->api->auth->get('id'));

Afterwards you can use model inside CRUD, MVCGrid, MVCForm or MVCLister, the following rule will apply:

• When listing, only trips belonging to current user will be shown
• When adding, user_id will be set to current user's id

Sometimes I add function:

class Model_User extends Model_Table {
    function getTrips(){
         return $this->add('Model_trips')
              ->setMasterField('user_id',$this->get('id'));
    }
}

Then you can make use the following.

$model = $this->add('Model_user')->loadData($user_id)->$getTrips();

Handy if you want to see other users trips.