Merge pull request #32 from teamones-open/dev_weijer

fixed: 优化验证是否唯一方法由 count 改成 find

Author: weijer

src/think/Validate.php

@@ -1033,9 +1033,9 @@ public function unique($value, $rule, array $data = [], string $field = ''): boo
             $currentModel->where($where);
         }
 
-        $resData = $currentModel->count();
+        $existData = $currentModel->find();
 
-        if ($resData > 0) {
+        if (!empty($existData)) {
             return false;
         }