[11.x] Prevent blank Helper from Serializing Eloquent Models (#53911)

* Prevent jsonSerialize model blank helper

* styleci

src/Illuminate/Support/helpers.php

@@ -2,6 +2,7 @@
 
 use Illuminate\Contracts\Support\DeferringDisplayableValue;
 use Illuminate\Contracts\Support\Htmlable;
+use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Env;
 use Illuminate\Support\Fluent;
@@ -61,6 +62,10 @@ function blank($value)
             return false;
         }
 
+        if ($value instanceof Model) {
+            return false;
+        }
+
         if ($value instanceof Countable) {
             return count($value) === 0;
         }

tests/Support/SupportHelpersTest.php

@@ -7,6 +7,7 @@
 use Countable;
 use Error;
 use Illuminate\Contracts\Support\Htmlable;
+use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\Env;
 use Illuminate\Support\Optional;
 use Illuminate\Support\Sleep;
@@ -75,6 +76,19 @@ public function testBlank()
         $this->assertTrue(blank($object));
     }
 
+    public function testBlankDoesntJsonSerializeModels()
+    {
+        $model = new class extends Model
+        {
+            public function jsonSerialize(): mixed
+            {
+                throw new RuntimeException('Model should not be serialized');
+            }
+        };
+
+        $this->assertFalse(blank($model));
+    }
+
     public function testClassBasename()
     {
         $this->assertSame('Baz', class_basename('Foo\Bar\Baz'));