Eloquent - how to add a join in the hasMany relationship? - laravel

Question

I have a typical hasMany method:
public function earmarks() {
return $this->hasMany('App\Earmark');
}
But how do I add a join and some other conditions to this relationship when I use the ->with('earmarks') to retrieve them? I want to add:
->join('locations', 'locations.id', '=', 'earmarks.location')
->select('earmarks.*', 'locations.location AS em_location')
->orderBy('date', 'asc');

Answer 1

OK, figured out I need a closure in my with() clause, like this:
$updated_laptops = Laptop::with([
'earmarks' => function($q) {
$q
->join('locations', 'locations.id', '=', 'earmarks.location')
->select('earmarks.*', 'locations.location AS em_location')
->orderBy('date', 'asc');
}
])->addJoins()->selectListCols()->find($request->IDs)->keyBy('id');

Answer 2

this worked for me
public function earmarks() {
return $this->hasMany('App\Earmark', 'labtop_id', 'id')
->join('locations', 'locations.id', '=', 'earmarks.location')
->select('earmarks.*', 'locations.location AS em_location')
->orderBy('date', 'asc')->get();
}
it can be a attribute in Labtop Model and be serializable in Labtop json object like this :
public function GetEarmarksAttribute() {
return $this->hasMany('App\Earmark', 'labtop_id', 'id')
->join('locations', 'locations.id', '=', 'earmarks.location')
->select('earmarks.*', 'locations.location AS em_location')
->orderBy('date', 'asc')->get();
}
protected $appends = array('earmarks');

Answer 3

When you defined a hasMany method in the Location model (e.g. \App\Models\Location.php)
public function earmarks() {
return $this->hasMany('App\Earmark');
}
You can return a Location object in Controller (e.g. LocationController.php ):
public function show($id)
{
$location = \App\Models\Location::find($id);
return view('locations.show)
->with('location', $location);
}
Then in the view (e.g. locations\show.blade.php), you can retrieve the data like this:
#foreach ($location->earmarks->sortBy('date') as $earmark )
<p>{{ $earmark->attribute_name }}</p>
#endforeach