Use 2 versions of a trait to ensure Schema::$connection property is defined ccompatible with each Laravel version

Author: GromNaN

src/Schema/Blueprint.php

@@ -4,11 +4,9 @@
 
 namespace MongoDB\Laravel\Schema;
 
-use Closure;
-use Illuminate\Database\Connection;
-use Illuminate\Database\Schema\Blueprint as SchemaBlueprint;
+use Illuminate\Database\Schema\Blueprint as BaseBlueprint;
 use MongoDB\Collection;
-use ReflectionMethod;
+use MongoDB\Laravel\Connection;
 
 use function array_flip;
 use function implode;
@@ -18,22 +16,18 @@
 use function is_string;
 use function key;
 
-class Blueprint extends SchemaBlueprint
+/** @property Connection $connection */
+class Blueprint extends BaseBlueprint
 {
-    private static bool $hasConnectionInConstructor;
-
-    /**
-     * The MongoDB connection object for this blueprint.
-     */
-    protected Connection $connection;
+    // Import $connection property and constructor for Laravel 12 compatibility
+    use BlueprintLaravelCompatibility;
 
     /**
      * The MongoDB collection object for this blueprint.
-     * Type added in Laravel 12.
      *
      * @var Collection
      */
-    protected Collection $collection;
+    protected $collection;
 
     /**
      * Fluent columns.
@@ -42,28 +36,6 @@ class Blueprint extends SchemaBlueprint
      */
     protected $columns = [];
 
-    /**
-     * Create a new schema blueprint.
-     */
-    public function __construct(Connection $connection, string $collection, ?Closure $callback = null)
-    {
-        // Parent constructor signature was changed in Laravel 12
-        // https://github.com/laravel/framework/commit/f29df4740d724f1c36385c9989569e3feb9422df#diff-68f714a9f1b751481b993414d3f1300ad55bcef12084ec0eb8f47f350033c24bR107
-        self::$hasConnectionInConstructor ??= (new ReflectionMethod(parent::class, '__construct'))->getParameters()[0]->getName() === 'connection';
-
-        if (self::$hasConnectionInConstructor) {
-            // Laravel 12 and after
-            parent::__construct($connection, $collection, $callback);
-        } else {
-            // Laravel 11 and before
-            parent::__construct($collection, $callback);
-        }
-
-        $this->connection = $connection;
-
-        $this->collection = $this->connection->getCollection($collection);
-    }
-
     /** @inheritdoc */
     public function index($columns = null, $name = null, $algorithm = null, $options = [])
     {

src/Schema/BlueprintLaravelCompatibility.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace MongoDB\Laravel\Schema;
+
+use Closure;
+use Illuminate\Database\Connection;
+use Illuminate\Database\Schema\Blueprint as BaseBlueprint;
+
+use function property_exists;
+
+/**
+ * The $connection property and constructor param were added in Laravel 12
+ * We keep the untyped $connection property for older version of Laravel to maintain compatibility
+ * and not break projects that would extend the MongoDB Blueprint class.
+ *
+ * @see https://github.com/laravel/framework/commit/f29df4740d724f1c36385c9989569e3feb9422df#diff-68f714a9f1b751481b993414d3f1300ad55bcef12084ec0eb8f47f350033c24bR107
+ */
+if (! property_exists(BaseBlueprint::class, 'connection')) {
+    /** @internal For compatibility with Laravel 10 and 11 */
+    trait BlueprintLaravelCompatibility
+    {
+        /**
+         * The MongoDB connection object for this blueprint.
+         *
+         * @var Connection
+         */
+        protected $connection;
+
+        public function __construct(Connection $connection, string $collection, ?Closure $callback = null)
+        {
+            parent::__construct($collection, $callback);
+
+            $this->connection = $connection;
+            $this->collection = $connection->getCollection($collection);
+        }
+    }
+} else {
+    /** @internal For compatibility with Laravel 12+ */
+    trait BlueprintLaravelCompatibility
+    {
+        public function __construct(Connection $connection, string $collection, ?Closure $callback = null)
+        {
+            parent::__construct($connection, $collection, $callback);
+
+            $this->collection = $connection->getCollection($collection);
+        }
+    }
+}