// Product model
public function stockValueSum()
{
return $this->hasMany('Stock')->sum('value');
}
then
Product::find($id)->stockValueSum();
will return sum of related 'value' columns on 'Stock' model's table
Mind though that you can't eager load this value with the above method. For doing this you would have to do some join
Last updated
1 year ago.
$product = Product::with(array('stock' => function($query) {
$query->sum('value');
}))->where('id', '=', $id)->first();
Last updated
1 year ago.
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