[FIX] Presence verifier on lumen

src/DoctrineServiceProvider.php

@@ -54,6 +54,8 @@ public function boot()
                 $this->getConfigPath() => config_path('doctrine.php'),
             ], 'config');
         }
+
+        $this->ensureValidatorIsUsable();
     }
 
     /**
@@ -81,6 +83,26 @@ public function register()
         }
     }
 
+    protected function ensureValidatorIsUsable()
+    {
+        if(!$this->isLumen()) {
+            return;
+        }
+
+        if($this->shouldRegisterDoctrinePresenceValidator()) {
+            // due to weirdness the default presence verifier overrides one set by a service provider
+            // so remove them so we can re add our implementation later
+            unset($this->app->availableBindings['validator']);
+            unset($this->app->availableBindings['Illuminate\Contracts\Validation\Factory']);
+        } else {
+            // resolve the db,
+            // this makes `isset($this->app['db']) == true`
+            // which is required to set the presence verifier
+            // in the default ValidationServiceProvider implementation
+            $this->app['db'];
+        }
+    }
+
     /**
      * Merge config
      */
@@ -202,7 +224,11 @@ protected function registerExtensions()
      */
     protected function registerPresenceVerifierProvider()
     {
-        $this->app->register(PresenceVerifierProvider::class);
+        $this->app->singleton('validator', function () {
+            $this->app->register(PresenceVerifierProvider::class);
+
+            return $this->app->make('validator');
+        });
     }
 
     /**

src/Validation/PresenceVerifierProvider.php

@@ -2,6 +2,7 @@
 
 namespace LaravelDoctrine\ORM\Validation;
 
+use Illuminate\Validation\Factory;
 use Illuminate\Validation\ValidationServiceProvider;
 
 class PresenceVerifierProvider extends ValidationServiceProvider
@@ -13,6 +14,27 @@ class PresenceVerifierProvider extends ValidationServiceProvider
      */
     protected $defer = true;
 
+    /**
+     * Register the validation factory.
+     *
+     * @return void
+     */
+    protected function registerValidationFactory()
+    {
+        $this->app->singleton('validator', function ($app) {
+            $validator = new Factory($app['translator'], $app);
+
+            // The validation presence verifier is responsible for determining the existence of
+            // values in a given data collection which is typically a relational database or
+            // other persistent data stores. It is used to check for "uniqueness" as well.
+            if (isset($app['registry']) && isset($app['validation.presence'])) {
+                $validator->setPresenceVerifier($app['validation.presence']);
+            }
+
+            return $validator;
+        });
+    }
+
     /**
      * Register the database presence verifier.
      *