refactor(model): remove default 'id' from dbIgnoreSave list

src/Libs/Model.php

@@ -31,7 +31,7 @@ class Model
     /**
      * @var array Attributes to ignore when saving to the database.
      */
-    protected static array $dbIgnoreSave = ['id'];
+    protected static array $dbIgnoreSave = [];
 
     /**
      * @var array Attributes that should be explicitly saved, even if private/protected.
@@ -480,12 +480,8 @@ class Model
 
         $set = [];
         foreach ($atts as $key => $value) {
-            if ($value !== null) {
-                $set[] = "$key=:$key";
-                static::$dbQueryVariables[':' . $key] = $value;
-            } else {
-                $set[] = "$key=NULL";
-            }
+            $set[] = "$key=:$key";
+            static::$dbQueryVariables[':' . $key] = $value;
         }
 
         $table = static::table();
@@ -511,11 +507,9 @@ class Model
         static::$dbQueryVariables = [];
 
         foreach ($atts as $key => $value) {
-            if (isset($value)) {
-                $into[] = "$key";
-                $values[] = ":$key";
-                static::$dbQueryVariables[":$key"] = $value;
-            }
+            $into[] = "$key";
+            $values[] = ":$key";
+            static::$dbQueryVariables[":$key"] = $value;
         }
 
         $table = static::table();
@@ -523,7 +517,7 @@ class Model
         static::query($sql);
 
         $pk = static::$dbPrimaryKey;
-        $this->$pk = $db->lastInsertId();
+        $this->$pk ??= $db->lastInsertId();
         $this->markAsSaved();
     }