codeigniter加入電子郵件查詢問題

Question

我的Codeigniter加入查詢不起作用。在一個函數中只是試圖匹配用戶表中的RC代碼並獲取電子郵件，該函數正常工作，下一個目標是匹配文章表中的電子郵件ID並正確獲取文章，但生病嘗試加入用戶表和文章表我需要從用戶表中獲取用戶姓氏&姓氏，我不知道是否正確或不正確，請查看下面的代碼。控制器部分：

public function user_article() 
{ 

    $rc=$_GET['rc']; 
    $data['title'] = "User Article";   
    if ($this->session->userdata ('is_logged_in')){ 
     $data['profile']=$this->model_users->profilefetch(); 
     $data['results']=$this->article_m->u_article($_GET); 
     $this->load->view('sd/header',$data); 
     $this->load->view('sd/user_article', $data); 
     $this->load->view('sd/footer', $data); 
    } 
    else { 

    } 
} 

我的模型：

function u_article($rc) 
    { 
     $query=$this->db->select('email')->where('rc',$rc['rc'])->get('users'); 

     $result=$query->result_array(); 
     if ($query->num_rows() > 0) { 
      $row = $query->row_array(); 
      $array = array ('email' => $row['email'], 'a.status' => '1'); 
      $query1=$this->db->select('a.id,title,a.status,description,image,a.email,tags,postdate,firstname,lastname,rc')->join('users u','u.email = a.email','left')->where($array)->get('articles a'); 

      if ($query1->num_rows() > 0) { 
       foreach ($query1->result() as $row) { 
        $data[] = $row; 
       } 
       return $data; 
      } 
      else {return NULL;} 
     } else {return NULL;} 

    } 

檢查我的代碼，並告訴我，我的錯誤在此先感謝。在查看

錯誤鞋：

A Database Error Occurred 

    Error Number: 1052 

    Column 'email' in where clause is ambiguous 

    SELECT `a`.`id`, `title`, `a`.`status`, `description`, `image`, `a`.`email`, `tags`, `postdate`, `firstname`, `lastname`, `rc` FROM (`articles` a) LEFT JOIN `users` u ON `u`.`email` = `a`.`email` WHERE `email` = 'admin@gmail.com' AND `a`.`status` = '1' 

    Filename: F:\wamp\www\project\system\database\DB_driver.php 

    Line Number: 331 

Answer 1

重構你的代碼。只需複製粘貼並檢查其工作。

控制器：

public function user_article() 
{ 

    $rc = $this->input->get('rc'); 
    $data['title'] = "User Article";   
    if ($this->session->userdata ('is_logged_in')) 
    { 
     $data['profile']=$this->model_users->profilefetch(); 
     $data['results']=$this->article_m->u_article($rc); 
     $this->load->view('sd/header',$data); 
     $this->load->view('sd/user_article', $data); 
     $this->load->view('sd/footer', $data); 
    } 
    else 
    { 

    } 
} 

型號：

function u_article($rc) 
{ 
    $query = $this->db->select('email')->where('rc',$rc)->get('users'); 
    $result = $query->result_array(); 

    if ($query->num_rows() > 0) 
    { 
     $row = $query->row_array(); 
     $array = array ('u.email' => $row['email'], 'a.status' => '1'); 
     $query1 = $this->db->select('a.id,a.title,a.status,a.description,a.image,a.email,a.tags,a.postdate,u.firstname,u.lastname,u.rc')->join('users u','u.email = a.email','left')->where($array)->get('articles a'); 

     if ($query1->num_rows() > 0) 
     { 
      foreach ($query1->result() as $row) 
      { 
       $data[] = $row; 
      } 
      return $data; 
     } 
     else {return NULL;} 
    } else {return NULL;} 
}