2.6 - Encapsulating Relationship Logic in the Model

app/Concert.php

@@ -33,4 +33,15 @@ class Concert extends Model
     {
         return $this->hasMany(Order::class);
     }
+
+    public function orderTickets($email, $ticketQuantity)
+    {
+        $order = $this->orders()->create(['email' => $email]);
+
+        foreach (range(1, $ticketQuantity) as $i) {
+            $order->tickets()->create([]);
+        }
+
+        return $order;
+    }
 }

app/Http/Controllers/ConcertOrdersController.php

@@ -18,16 +18,8 @@ class ConcertOrdersController extends Controller
     public function store($concertId)
     {
         $concert = Concert::find($concertId);
-        $ticketQuantity = request('ticket_quantity');
+        $this->paymentGateway->charge(request('ticket_quantity') * $concert->ticket_price, request('payment_token'));
-        $amount = $ticketQuantity * $concert->ticket_price;
+        $order = $concert->orderTickets(request('email'), request('ticket_quantity'));
-        $token = request('payment_token');
-        $this->paymentGateway->charge($amount, $token);
-
-        $order = $concert->orders()->create(['email' => request('email')]);
-
-        foreach (range(1, $ticketQuantity) as $i) {
-            $order->tickets()->create([]);
-        }
 
         return response()->json([], 201);
     }

tests/unit/ConcertTest.php

@@ -53,4 +53,15 @@ class ConcertTest extends TestCase
         $this->assertTrue($publishedConcerts->contains($publishedConcertB));
         $this->assertFalse($publishedConcerts->contains($unpublishedConcert));
     }
+
+    /** @test */
+    function can_order_concert_tickets()
+    {
+        $concert = factory(Concert::class)->create();
+
+        $order = $concert->orderTickets('jane@example.com', 3);
+
+        $this->assertEquals('jane@example.com', $order->email);
+        $this->assertEquals(3, $order->tickets()->count());
+    }
 }