发生错误时，codeigniter 4 未显示 mysql 完整查询答案

【问题标题】：codeigniter 4 not showing mysql full query when error occured发生错误时，codeigniter 4 未显示 mysql 完整查询
【发布时间】：2021-10-14 11:32:04
【问题描述】：

发生错误时如何显示完整的查询字符串。我的查询如下

    $builder = $this->table("$this->table");
    $builder->select("usr_lock");
    $builder->where("usr_lock >= '" . date('Y-m-d H:i:s') . "'");
    $builder->where($this->primarykey, $user_id);
    $r = $builder->get()->rowArray();
    echo "<br>Error: " . $builder->error();
    echo "<br>Last Query: " . $builder->getLastQuery();
    return $r['usr_lock'];

执行此操作时，错误显示为You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '= '1'' at line 4 。要了解错误，我需要获得完整的查询。所以我使用了$builder->getLastQuery()。但它不执行。页面看起来像

【问题讨论】：

标签： php mysql codeigniter-4

【解决方案1】：

在执行$builder->get()之前使用$builder->getCompiledSelect()

    $builder = $this->table("$this->table");
    $this->db_debug = FALSE;
    $builder->select("usr_lock");
    $builder->where("usr_lock >= '" . date('Y-m-d H:i:s') . "'");
    $builder->where($this->primarykey, $user_id);
    echo "<br>Last Query: " . $builder->getCompiledSelect(false);
    exit();

【讨论】：