Fix forceCreate on MorphMany not returning newly created object (#42996)

Author: jamescodium

src/Illuminate/Database/Eloquent/Relations/MorphMany.php

@@ -57,6 +57,6 @@ public function forceCreate(array $attributes = [])
     {
         $attributes[$this->getMorphType()] = $this->morphClass;
 
-        parent::forceCreate($attributes);
+        return parent::forceCreate($attributes);
     }
 }

tests/Database/DatabaseEloquentMorphOneOfManyTest.php

@@ -97,9 +97,11 @@ public function testMorphType()
     public function testForceCreateMorphType()
     {
         $product = MorphOneOfManyTestProduct::create();
-        $product->states()->forceCreate([
+        $state = $product->states()->forceCreate([
             'state' => 'active',
         ]);
+
+        $this->assertNotNull($state);
         $this->assertSame(MorphOneOfManyTestProduct::class, $product->current_state->stateful_type);
     }