不唯一 table/alias：'siswa' 错误编号：1066 Codeigniter

Question

我的脚本有错误，我只想显示 siswa 详细数据

Error Number: 1066

Not unique table/alias: 'siswa'

SELECT * FROM (kelas, siswa) JOIN siswa ON siswa.kelas_id = kelas.id WHERE nis = '1001'

Filename: C:/xampp/htdocs/konsultasi/system/database/DB_driver.php

Line Number: 691

我的控制器：

public function siswa_detail($id)
  {
    $detail = $this->m_datas->detail_data($id);
    $data['detail'] = $detail;

    $this->load->view('templates/header');
    $this->load->view('v_bk/view_siswa_detail', $data);
    $this->load->view('templates/footer');
  }

我的模特：

public function detail_data($id = NULL)
    {
        $this->db->select('*');
        $this->db->from('siswa');
        $this->db->join('kelas', 'siswa.kelas_id = kelas.id');
        $query = $this->db->get_where('siswa', array('nis' => $id))->row();
        return $query;
    }

Answer 1

你必须删除 $this->db->from('siswa')

    public function detail_data($id = NULL)
    {
        $this->db->select('*');
        $this->db->join('kelas', 'siswa.kelas_id = kelas.id');
        $query = $this->db->get_where('siswa', array('nis' => $id))->row();
        return $query;
    }

并且最好在join中插入'left'或'right'。

$this->db->join('kelas', 'siswa.kelas_id = kelas.id', 'left');

不唯一 table/alias：'siswa' 错误编号：1066 Codeigniter

Not unique table/alias: 'siswa' Error Number: 1066 Codeigniter

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