[5.4] fix eloquent collection contains issue (#19568)

* fix eloquent collection contains issue

* use $model->is($key) instead

* remove useless code

Author: storyn26383

src/Illuminate/Database/Eloquent/Collection.php

@@ -83,7 +83,11 @@ public function contains($key, $operator = null, $value = null)
             return parent::contains(...func_get_args());
         }
 
-        $key = $key instanceof Model ? $key->getKey() : $key;
+        if ($key instanceof Model) {
+            return parent::contains(function ($model) use ($key) {
+                return $model->is($key);
+            });
+        }
 
         return parent::contains(function ($model) use ($key) {
             return $model->getKey() == $key;

tests/Database/DatabaseEloquentCollectionTest.php

@@ -45,18 +45,35 @@ public function testContainsWithMultipleArguments()
     public function testContainsIndicatesIfModelInArray()
     {
         $mockModel = m::mock('Illuminate\Database\Eloquent\Model');
-        $mockModel->shouldReceive('getKey')->andReturn(1);
+        $mockModel->shouldReceive('is')->with($mockModel)->andReturn(true);
+        $mockModel->shouldReceive('is')->andReturn(false);
         $mockModel2 = m::mock('Illuminate\Database\Eloquent\Model');
-        $mockModel2->shouldReceive('getKey')->andReturn(2);
+        $mockModel2->shouldReceive('is')->with($mockModel2)->andReturn(true);
+        $mockModel2->shouldReceive('is')->andReturn(false);
         $mockModel3 = m::mock('Illuminate\Database\Eloquent\Model');
-        $mockModel3->shouldReceive('getKey')->andReturn(3);
+        $mockModel3->shouldReceive('is')->with($mockModel3)->andReturn(true);
+        $mockModel3->shouldReceive('is')->andReturn(false);
         $c = new Collection([$mockModel, $mockModel2]);
 
         $this->assertTrue($c->contains($mockModel));
         $this->assertTrue($c->contains($mockModel2));
         $this->assertFalse($c->contains($mockModel3));
     }
 
+    public function testContainsIndicatesIfDiffentModelInArray()
+    {
+        $mockModelFoo = m::namedMock('Foo', 'Illuminate\Database\Eloquent\Model');
+        $mockModelFoo->shouldReceive('is')->with($mockModelFoo)->andReturn(true);
+        $mockModelFoo->shouldReceive('is')->andReturn(false);
+        $mockModelBar = m::namedMock('Bar', 'Illuminate\Database\Eloquent\Model');
+        $mockModelBar->shouldReceive('is')->with($mockModelBar)->andReturn(true);
+        $mockModelBar->shouldReceive('is')->andReturn(false);
+        $c = new Collection([$mockModelFoo]);
+
+        $this->assertTrue($c->contains($mockModelFoo));
+        $this->assertFalse($c->contains($mockModelBar));
+    }
+
     public function testContainsIndicatesIfKeyedModelInArray()
     {
         $mockModel = m::mock('Illuminate\Database\Eloquent\Model');