修正游标查询时json字段未正确解析的问题

Author: yunwuxin

src/db/PDOConnection.php

@@ -662,6 +662,12 @@ public function getCursor(BaseQuery $query, string $sql, $model = null, $conditi
         // 返回结果集
         while ($result = $this->PDOStatement->fetch($this->fetchType)) {
             if ($model) {
+                // JSON数据处理
+                $options = $query->getOptions();
+                if (!empty($options['json'])) {
+                    $query->jsonModelResult($result);
+                }
+
                 yield $model->newInstance($result, $condition);
             } else {
                 yield $result;