[8.x] Fix Doctrine type mappings creating too many connections

src/Illuminate/Database/Connection.php

@@ -177,6 +177,13 @@ class Connection implements ConnectionInterface
      */
     protected $doctrineConnection;
 
+    /**
+     * Type mappings that should be registered with new Doctrine connections.
+     *
+     * @var array
+     */
+    protected $doctrineTypeMappings = [];
+
     /**
      * The connection resolvers.
      *
@@ -1007,6 +1014,12 @@ public function getDoctrineConnection()
                 'driver' => method_exists($driver, 'getName') ? $driver->getName() : null,
                 'serverVersion' => $this->getConfig('server_version'),
             ]), $driver);
+
+            foreach ($this->doctrineTypeMappings as $name => $type) {
+                $this->doctrineConnection
+                    ->getDatabasePlatform()
+                    ->registerDoctrineTypeMapping($type, $name);
+            }
         }
 
         return $this->doctrineConnection;
@@ -1035,9 +1048,7 @@ public function registerDoctrineType(string $class, string $name, string $type):
             Type::addType($name, $class);
         }
 
-        $this->getDoctrineSchemaManager()
-            ->getDatabasePlatform()
-            ->registerDoctrineTypeMapping($type, $name);
+        $this->doctrineTypeMappings[$name] = $type;
     }
 
     /**

src/Illuminate/Database/DatabaseManager.php

@@ -2,12 +2,14 @@
 
 namespace Illuminate\Database;
 
+use Doctrine\DBAL\Types\Type;
 use Illuminate\Database\Connectors\ConnectionFactory;
 use Illuminate\Support\Arr;
 use Illuminate\Support\ConfigurationUrlParser;
 use Illuminate\Support\Str;
 use InvalidArgumentException;
 use PDO;
+use RuntimeException;
 
 /**
  * @mixin \Illuminate\Database\Connection
@@ -49,6 +51,13 @@ class DatabaseManager implements ConnectionResolverInterface
      */
     protected $reconnector;
 
+    /**
+     * The custom Doctrine column types.
+     *
+     * @var array
+     */
+    protected $doctrineTypes = [];
+
     /**
      * Create a new database manager instance.
      *
@@ -207,16 +216,46 @@ protected function setPdoForType(Connection $connection, $type = null)
     }
 
     /**
-     * Register custom Doctrine types from the configuration with the connection.
+     * Register custom Doctrine types with the connection.
      *
      * @param  \Illuminate\Database\Connection  $connection
      * @return void
      */
     protected function registerConfiguredDoctrineTypes(Connection $connection): void
     {
         foreach ($this->app['config']->get('database.dbal.types', []) as $name => $class) {
-            $connection->registerDoctrineType($class, $name, $name);
+            $this->registerDoctrineType($class, $name, $name);
+        }
+
+        foreach ($this->doctrineTypes as $name => [$type, $class]) {
+            $connection->registerDoctrineType($class, $name, $type);
+        }
+    }
+
+    /**
+     * Register a custom Doctrine type.
+     *
+     * @param  string  $class
+     * @param  string  $name
+     * @param  string  $type
+     * @return void
+     *
+     * @throws \Doctrine\DBAL\DBALException
+     * @throws \RuntimeException
+     */
+    public function registerDoctrineType(string $class, string $name, string $type): void
+    {
+        if (! class_exists('Doctrine\DBAL\Connection')) {
+            throw new RuntimeException(
+                'Registering a custom Doctrine type requires Doctrine DBAL (doctrine/dbal).'
+            );
         }
+
+        if (! Type::hasType($name)) {
+            Type::addType($name, $class);
+        }
+
+        $this->doctrineTypes[$name] = [$type, $class];
     }
 
     /**