致命错误：调用未定义的方法CI_DB_mysql_driver :: group_start（）

Question

我正在开发codeigniter php web应用程序。我有这样的错误：

  

致命错误：在第31行的C：\ wamp \ www \ ci_sock \ application \ models \ customer_m.php中调用未定义的方法CI_DB_mysql_driver :: group_start（）

如何解决这个问题。我的d => (d.IsNullable && (d.ColumnType != typeof(string)) && (d.ColumnType.IsValueType)) ? type.MakeGenericType(new[] { d.ColumnType }) : d.ColumnType); 代码如下：

PHP

这样有31行foreach ($this->column_search as $item) // loop column { if($_POST['search']['value']) // if datatable send POST for search { if($i===0) // first loop { $this->db->group_start(); // open bracket. query Where with OR clause better with bracket. because maybe can combine with other WHERE with AND. $this->db->like($item, $_POST['search']['value']); } else { $this->db->or_like($item, $_POST['search']['value']); } if(count($this->column_search) - 1 == $i) //last loop $this->db->group_end(); //close bracket } $i++; } 。

请帮我解决这个问题。

Answer 1

我有解决此问题的方法，请将您的代码更改为以下内容：

if($_POST['search']['value']) // if datatable send POST for search
            {

                if($i===0) // first loop
                {
                    // $this->db->group_start(); // open bracket. query Where with OR clause better with bracket. because maybe can combine with other WHERE with AND.
                    $this->db->like($item, $_POST['search']['value']);
                }
                else
                {
                    $this->db->or_like($item, $_POST['search']['value']);
                }

                if(count($this->column_search) - 1 == $i); //last loop
                    // $this->db->group_end(); //close bracket


            }

Answer 2

试试这种方式。

$this->db->group_start();
$this->db->or_group_start(); 
foreach ($this->column_search as $item) // loop column 
    {
        if($_POST['search']['value']) // if datatable send POST for search
        {
                    $this->db->or_like($item, $_POST['search']['value']);
        }
    }
   $this->db->or_group_end();
   $this->db->group_end();

注意：此时我无法检查执行此代码