multi connections system

src/Model.php

@@ -7,13 +7,14 @@ class Model
     protected mixed $values;
     protected array $updated;
     protected string $table;
+    protected string $connection = "default";
     protected string $pk;
-    private Db $db;
+    private ?Db $db;
     private bool $new;
 
     public function __construct()
     {
-        $this->db = Db::getInstance();
+        $this->db = null;
         $this->new = true;
         $this->values = array();
         $this->updated = array();
@@ -43,6 +44,17 @@ class Model
         return $this;
     }
 
+    public function getConnection()
+    {
+        return $this->connection;
+    }
+
+    public function setConnection($connection)
+    {
+        $this->connection = $connection;
+        return $this;
+    }
+
     public function fillData(mixed $data): self
     {
         $this->values = $data;
@@ -53,6 +65,7 @@ class Model
 
     public function save(): bool
     {
+        $this->db = Db::getInstance($this->connection);
         $ret = false;
         $qb = $this->newQueryBuilder();
         if ($this->new) {
@@ -84,7 +97,7 @@ class Model
 
     public function newQueryBuilder(): QueryBuilder
     {
-        return new QueryBuilder($this->table, $this->pk);
+        return new QueryBuilder($this->table, $this->pk, $this->connection);
     }
 
     public function __set($name, $value): void