diff --git a/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php b/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
index 289770375f94..5f2ec2dab7b9 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
@@ -210,14 +210,18 @@ public function withCount($relations)
 
             $query->callScope($constraints);
 
-            $query->mergeConstraintsFrom($relation->getQuery());
+            $query = $query->mergeConstraintsFrom($relation->getQuery())->toBase();
+
+            if (count($query->columns) > 1) {
+                $query->columns = [$query->columns[0]];
+            }
 
             // Finally we will add the proper result column alias to the query and run the subselect
             // statement against the query builder. Then we will return the builder instance back
             // to the developer for further constraint chaining that needs to take place on it.
             $column = $alias ?? Str::snake($name.'_count');
 
-            $this->selectSub($query->toBase(), $column);
+            $this->selectSub($query, $column);
         }
 
         return $this;
diff --git a/src/Illuminate/Database/Eloquent/FactoryBuilder.php b/src/Illuminate/Database/Eloquent/FactoryBuilder.php
index 0fc522c1a109..7f4eccaa9da8 100644
--- a/src/Illuminate/Database/Eloquent/FactoryBuilder.php
+++ b/src/Illuminate/Database/Eloquent/FactoryBuilder.php
@@ -313,7 +313,7 @@ protected function stateAttributes($state, array $attributes)
     protected function expandAttributes(array $attributes)
     {
         foreach ($attributes as &$attribute) {
-            if (is_callable($attribute) && ! is_string($attribute)) {
+            if (is_callable($attribute) && ! is_string($attribute) && ! is_array($attribute)) {
                 $attribute = $attribute($attributes);
             }
 
diff --git a/src/Illuminate/Database/Eloquent/Model.php b/src/Illuminate/Database/Eloquent/Model.php
index 80c59cbd4b72..c6243e82ef5b 100644
--- a/src/Illuminate/Database/Eloquent/Model.php
+++ b/src/Illuminate/Database/Eloquent/Model.php
@@ -1372,7 +1372,7 @@ public function resolveRouteBinding($value)
      */
     public function getForeignKey()
     {
-        return Str::snake(class_basename($this)).'_'.$this->primaryKey;
+        return Str::snake(class_basename($this)).'_'.$this->getKeyName();
     }
 
     /**
diff --git a/src/Illuminate/Database/Query/Builder.php b/src/Illuminate/Database/Query/Builder.php
index 2bbddfd066f9..1025915ed919 100755
--- a/src/Illuminate/Database/Query/Builder.php
+++ b/src/Illuminate/Database/Query/Builder.php
@@ -279,8 +279,6 @@ public function selectSub($query, $as)
     protected function parseSubSelect($query)
     {
         if ($query instanceof self) {
-            $query->columns = [$query->columns[0]];
-
             return [$query->toSql(), $query->getBindings()];
         } elseif (is_string($query)) {
             return [$query, []];
diff --git a/src/Illuminate/Database/Query/Grammars/MySqlGrammar.php b/src/Illuminate/Database/Query/Grammars/MySqlGrammar.php
index 8dff604ae6c3..8f4f81d0fcee 100755
--- a/src/Illuminate/Database/Query/Grammars/MySqlGrammar.php
+++ b/src/Illuminate/Database/Query/Grammars/MySqlGrammar.php
@@ -9,6 +9,13 @@
 
 class MySqlGrammar extends Grammar
 {
+    /**
+     * The grammar specific operators.
+     *
+     * @var array
+     */
+    protected $operators = ['sounds like'];
+
     /**
      * The components that make up a select clause.
      *
diff --git a/src/Illuminate/Http/Resources/ConditionallyLoadsAttributes.php b/src/Illuminate/Http/Resources/ConditionallyLoadsAttributes.php
index 300305564ebe..e6f70a098251 100644
--- a/src/Illuminate/Http/Resources/ConditionallyLoadsAttributes.php
+++ b/src/Illuminate/Http/Resources/ConditionallyLoadsAttributes.php
@@ -16,6 +16,8 @@ protected function filter($data)
     {
         $index = -1;
 
+        $numericKeys = array_values($data) === $data;
+
         foreach ($data as $key => $value) {
             $index++;
 
@@ -26,16 +28,7 @@ protected function filter($data)
             }
 
             if (is_numeric($key) && $value instanceof MergeValue) {
-                return $this->merge($data, $index, $this->filter($value->data));
-            }
-
-            if (($value instanceof PotentiallyMissing && $value->isMissing()) ||
-                ($value instanceof self &&
-                $value->resource instanceof PotentiallyMissing &&
-                $value->isMissing())) {
-                unset($data[$key]);
-
-                $index--;
+                return $this->merge($data, $index, $this->filter($value->data), $numericKeys);
             }
 
             if ($value instanceof self && is_null($value->resource)) {
@@ -43,7 +36,7 @@ protected function filter($data)
             }
         }
 
-        return $data;
+        return $this->removeMissingValues($data, $numericKeys);
     }
 
     /**
@@ -52,20 +45,42 @@ protected function filter($data)
      * @param  array  $data
      * @param  int  $index
      * @param  array  $merge
+     * @param  bool  $numericKeys
      * @return array
      */
-    protected function merge($data, $index, $merge)
+    protected function merge($data, $index, $merge, $numericKeys)
     {
-        if (array_values($data) === $data) {
-            return array_merge(
+        if ($numericKeys) {
+            return $this->removeMissingValues(array_merge(
                 array_merge(array_slice($data, 0, $index, true), $merge),
-                $this->filter(array_slice($data, $index + 1, null, true))
-            );
+                $this->filter(array_values(array_slice($data, $index + 1, null, true)))
+            ), $numericKeys);
         }
 
-        return array_slice($data, 0, $index, true) +
+        return $this->removeMissingValues(array_slice($data, 0, $index, true) +
                 $merge +
-                $this->filter(array_slice($data, $index + 1, null, true));
+                $this->filter(array_slice($data, $index + 1, null, true)));
+    }
+
+    /**
+     * Remove the missing values from the filtered data.
+     *
+     * @param  array  $data
+     * @param  bool  $numericKeys
+     * @return array
+     */
+    protected function removeMissingValues($data, $numericKeys = false)
+    {
+        foreach ($data as $key => $value) {
+            if (($value instanceof PotentiallyMissing && $value->isMissing()) ||
+                ($value instanceof self &&
+                $value->resource instanceof PotentiallyMissing &&
+                $value->isMissing())) {
+                unset($data[$key]);
+            }
+        }
+
+        return $numericKeys ? array_values($data) : $data;
     }
 
     /**
diff --git a/src/Illuminate/View/Compilers/Concerns/CompilesHelpers.php b/src/Illuminate/View/Compilers/Concerns/CompilesHelpers.php
index 4edd61f475ee..979cadc560cf 100644
--- a/src/Illuminate/View/Compilers/Concerns/CompilesHelpers.php
+++ b/src/Illuminate/View/Compilers/Concerns/CompilesHelpers.php
@@ -25,6 +25,17 @@ protected function compileDd($arguments)
         return "<?php dd{$arguments}; ?>";
     }
 
+    /**
+     * Compile the "dump" statements into valid PHP.
+     *
+     * @param  string  $arguments
+     * @return string
+     */
+    protected function compileDump($arguments)
+    {
+        return "<?php dump{$arguments}; ?>";
+    }
+
     /**
      * Compile the method statements into valid PHP.
      *
diff --git a/tests/Database/DatabaseQueryBuilderTest.php b/tests/Database/DatabaseQueryBuilderTest.php
index ac5b228302e2..02ca507f9f38 100755
--- a/tests/Database/DatabaseQueryBuilderTest.php
+++ b/tests/Database/DatabaseQueryBuilderTest.php
@@ -1449,10 +1449,11 @@ public function testAggregateWithSubSelect()
             return $results;
         });
         $builder->from('users')->selectSub(function ($query) {
-            $query->from('posts')->select('foo')->where('title', 'foo');
+            $query->from('posts')->select('foo', 'bar')->where('title', 'foo');
         }, 'post');
         $count = $builder->count();
         $this->assertEquals(1, $count);
+        $this->assertEquals('(select "foo", "bar" from "posts" where "title" = ?) as "post"', $builder->columns[0]->getValue());
         $this->assertEquals(['foo'], $builder->getBindings());
     }
 
@@ -1940,6 +1941,14 @@ public function testSqlServerLimitsAndOffsets()
         $this->assertEquals('select * from (select *, row_number() over (order by [email] desc) as row_num from [users]) as temp_table where row_num between 11 and 20', $builder->toSql());
     }
 
+    public function testMySqlSoundsLikeOperator()
+    {
+        $builder = $this->getMySqlBuilder();
+        $builder->select('*')->from('users')->where('name', 'sounds like', 'John Doe');
+        $this->assertEquals('select * from `users` where `name` sounds like ?', $builder->toSql());
+        $this->assertEquals(['John Doe'], $builder->getBindings());
+    }
+
     public function testMergeWheresCanMergeWheresAndBindings()
     {
         $builder = $this->getBuilder();
diff --git a/tests/Integration/Database/EloquentFactoryBuilderTest.php b/tests/Integration/Database/EloquentFactoryBuilderTest.php
index 3553b02d9436..395b652d5e76 100644
--- a/tests/Integration/Database/EloquentFactoryBuilderTest.php
+++ b/tests/Integration/Database/EloquentFactoryBuilderTest.php
@@ -42,6 +42,7 @@ protected function getEnvironmentSetUp($app)
             return [
                 'name' => $faker->name,
                 'status' => 'active',
+                'tags' => ['Storage', 'Data'],
                 'user_id' => function () {
                     return factory(FactoryBuildableUser::class)->create()->id;
                 },
@@ -80,6 +81,7 @@ public function setUp()
         Schema::create('servers', function ($table) {
             $table->increments('id');
             $table->string('name');
+            $table->string('tags');
             $table->integer('user_id');
             $table->string('status');
         });
@@ -134,6 +136,7 @@ public function creating_models_with_callable_states()
         $callableServer = factory(FactoryBuildableServer::class)->states('callable')->create();
 
         $this->assertEquals('active', $server->status);
+        $this->assertEquals(['Storage', 'Data'], $server->tags);
         $this->assertEquals('callable', $callableServer->status);
     }
 
@@ -208,6 +211,7 @@ class FactoryBuildableServer extends Model
     public $table = 'servers';
     public $timestamps = false;
     protected $guarded = ['id'];
+    public $casts = ['tags' => 'array'];
 
     public function user()
     {
diff --git a/tests/Integration/Http/ResourceTest.php b/tests/Integration/Http/ResourceTest.php
index f8d2f1c0d26d..5b52520ac61d 100644
--- a/tests/Integration/Http/ResourceTest.php
+++ b/tests/Integration/Http/ResourceTest.php
@@ -4,9 +4,11 @@
 
 use Orchestra\Testbench\TestCase;
 use Illuminate\Support\Facades\Route;
+use Illuminate\Http\Resources\MergeValue;
 use Illuminate\Pagination\LengthAwarePaginator;
 use Illuminate\Tests\Integration\Http\Fixtures\Post;
 use Illuminate\Tests\Integration\Http\Fixtures\Author;
+use Illuminate\Http\Resources\ConditionallyLoadsAttributes;
 use Illuminate\Tests\Integration\Http\Fixtures\PostResource;
 use Illuminate\Tests\Integration\Http\Fixtures\Subscription;
 use Illuminate\Tests\Integration\Http\Fixtures\PostCollectionResource;
@@ -521,4 +523,139 @@ public function test_original_on_response_is_collection_of_model_when_collection
             $this->assertTrue($response->getOriginalContent()->contains($post));
         });
     }
+
+    public function test_leading_merge_value_is_merged_correctly()
+    {
+        $filter = new class {
+            use ConditionallyLoadsAttributes;
+
+            public function work()
+            {
+                return $this->filter([
+                    new MergeValue(['First', 'Second']),
+                    'Taylor',
+                    'Mohamed',
+                    new MergeValue(['Adam', 'Matt']),
+                    'Jeffrey',
+                    new MergeValue(['Abigail', 'Lydia']),
+                ]);
+            }
+        };
+
+        $results = $filter->work();
+
+        $this->assertEquals([
+            'First', 'Second', 'Taylor', 'Mohamed', 'Adam', 'Matt', 'Jeffrey', 'Abigail', 'Lydia',
+        ], $results);
+    }
+
+    public function test_merge_values_may_be_missing()
+    {
+        $filter = new class {
+            use ConditionallyLoadsAttributes;
+
+            public function work()
+            {
+                return $this->filter([
+                    new MergeValue(['First', 'Second']),
+                    'Taylor',
+                    'Mohamed',
+                    $this->mergeWhen(false, ['Adam', 'Matt']),
+                    'Jeffrey',
+                    new MergeValue(['Abigail', 'Lydia']),
+                ]);
+            }
+        };
+
+        $results = $filter->work();
+
+        $this->assertEquals([
+            'First', 'Second', 'Taylor', 'Mohamed', 'Jeffrey', 'Abigail', 'Lydia',
+        ], $results);
+    }
+
+    public function test_initial_merge_values_may_be_missing()
+    {
+        $filter = new class {
+            use ConditionallyLoadsAttributes;
+
+            public function work()
+            {
+                return $this->filter([
+                    $this->mergeWhen(false, ['First', 'Second']),
+                    'Taylor',
+                    'Mohamed',
+                    $this->mergeWhen(true, ['Adam', 'Matt']),
+                    'Jeffrey',
+                    new MergeValue(['Abigail', 'Lydia']),
+                ]);
+            }
+        };
+
+        $results = $filter->work();
+
+        $this->assertEquals([
+            'Taylor', 'Mohamed', 'Adam', 'Matt', 'Jeffrey', 'Abigail', 'Lydia',
+        ], $results);
+    }
+
+    public function test_all_merge_values_may_be_missing()
+    {
+        $filter = new class {
+            use ConditionallyLoadsAttributes;
+
+            public function work()
+            {
+                return $this->filter([
+                    $this->mergeWhen(false, ['First', 'Second']),
+                    'Taylor',
+                    'Mohamed',
+                    $this->mergeWhen(false, ['Adam', 'Matt']),
+                    'Jeffrey',
+                    $this->mergeWhen(false, (['Abigail', 'Lydia'])),
+                ]);
+            }
+        };
+
+        $results = $filter->work();
+
+        $this->assertEquals([
+            'Taylor', 'Mohamed', 'Jeffrey',
+        ], $results);
+    }
+
+    public function test_nested_merges()
+    {
+        $filter = new class {
+            use ConditionallyLoadsAttributes;
+
+            public function work()
+            {
+                return $this->filter([
+                    $this->mergeWhen(true, [['Something']]),
+                    [
+                        $this->mergeWhen(true, ['First', $this->mergeWhen(true, ['Second'])]),
+                        'Third',
+                    ],
+                    [
+                        'Fourth',
+                    ],
+                ]);
+            }
+        };
+
+        $results = $filter->work();
+
+        $this->assertEquals([
+            [
+                'Something',
+            ],
+            [
+                'First', 'Second', 'Third',
+            ],
+            [
+                'Fourth',
+            ],
+        ], $results);
+    }
 }
diff --git a/tests/View/Blade/BladeHelpersTest.php b/tests/View/Blade/BladeHelpersTest.php
index c22e6508637d..9df79cec08a7 100644
--- a/tests/View/Blade/BladeHelpersTest.php
+++ b/tests/View/Blade/BladeHelpersTest.php
@@ -10,5 +10,6 @@ public function testEchosAreCompiled()
         $this->assertEquals('<?php echo method_field(\'patch\'); ?>', $this->compiler->compileString("@method('patch')"));
         $this->assertEquals('<?php dd($var1); ?>', $this->compiler->compileString('@dd($var1)'));
         $this->assertEquals('<?php dd($var1, $var2); ?>', $this->compiler->compileString('@dd($var1, $var2)'));
+        $this->assertEquals('<?php dump($var1, $var2); ?>', $this->compiler->compileString('@dump($var1, $var2)'));
     }
 }