Merge branch 'ahmedsayedabdelsalam/7.x' into 7.x

Author: taylorotwell

src/Illuminate/Database/Eloquent/Collection.php

@@ -629,4 +629,30 @@ public function getQueueableConnection()
 
         return $connection;
     }
+
+    /**
+     * Get the Eloquent query builder from the collection.
+     *
+     * @return Illuminate\Database\Eloquen\Builder
+     *
+     * @throws \LogicException
+     */
+    public function toQuery()
+    {
+        $model = $this->first();
+
+        if (! $model) {
+            throw new LogicException('Unable to create query for empty collection.');
+        }
+
+        $class = get_class($model);
+
+        if ($this->filter(function ($model) use ($class) {
+            return ! $model instanceof $class;
+        })->isNotEmpty()) {
+            throw new LogicException('Unable to create query for collection with mixed types.');
+        }
+
+        return $model->newModelQuery()->whereKey($this->modelKeys());
+    }
 }

tests/Database/DatabaseEloquentCollectionTest.php

@@ -2,6 +2,7 @@
 
 namespace Illuminate\Tests\Database;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Collection;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\Collection as BaseCollection;
@@ -455,6 +456,30 @@ public function testEmptyCollectionStayEmptyOnFresh()
         $c = new Collection;
         $this->assertEquals($c, $c->fresh());
     }
+
+    public function testCanConvertCollectionOfModelsToEloquentQueryBuilder()
+    {
+        $one = m::mock(Model::class);
+        $one->shouldReceive('getKey')->andReturn(1);
+
+        $two = m::mock(Model::class);
+        $two->shouldReceive('getKey')->andReturn(2);
+
+        $c = new Collection([$one, $two]);
+
+        $mocBuilder = m::mock(Builder::class);
+        $one->shouldReceive('newModelQuery')->once()->andReturn($mocBuilder);
+        $mocBuilder->shouldReceive('whereKey')->once()->with($c->modelKeys())->andReturn($mocBuilder);
+        $this->assertInstanceOf(Builder::class, $c->toQuery());
+    }
+
+    public function testConvertingEmptyCollectionToQueryThrowsException()
+    {
+        $this->expectException(LogicException::class);
+
+        $c = new Collection;
+        $c->toQuery();
+    }
 }
 
 class TestEloquentCollectionModel extends Model