在laravel中加载时，关系数组为null

Question

I am having issues getting the relationship array back when eager loading in laravel 4. for example:

controller:

         foreach (Apps::with('extra')->get() as $app)
         {
                 print_r($app->toArray());//returns array but my relationship array at the bottom  says null
                echo $app->extra; //this will show my relationship details

        }

model:

class Apps extends Eloquent
{
    protected $connection = 'mysql_2';
    protected $table = 'apps';
    public $timestamps = false;
    protected $primaryKey = 'name';


     public function host()
     {
           return $this->belongsTo('Hosts','name');
     }

     public function extra()
     {
            $this->primaryKey='app_ip';
           return $this->hasone('Extra','ip');
     }

  //other functions below.......

}

class Extra extends Eloquent
{
    protected $connection = 'mysql_3';
    protected $table = 'extra';
    public $timestamps = false;
    protected $primaryKey = 'ip';

    public function app(){
            return $this->belongsTo('Apps', 'app_ip');
}

mysql:

My mysql tables were not created through laravel they were previously existent. the app_ip column in the Apps table relates to the ip column in the extra table. it is a 1 to 1 relationship and I have specified the primary key in the relationship function. I am getting relationships back so I know that it is working.

I am able to get relationship data back when I call the function directly, but it does not show the relationship data when I try and print the full array. The main goal is to be able to return both the relationship columns and the app columns in one response.

Answer 1

You need to do this:

$apps = Apps::all();
$apps->load('extra');
foreach ($apps as $app)
{
   print_r($app->toArray()); // prints your relationship data as well
}

Answer 2

What you have should work and iterating through the collection or using ->load() to eager load shouldn't make a difference. Are you using the visible restriction on your models? If so you will need to include the relationships.

class Apps extends Eloquent {

    protected $visible = array(
        'id',
        'name',
        'created_at',
        'extra', // Make the relationship 'visible'
    );

    public function extra()
    {
        return $this->hasMany('Extra');
    }

}