如何使用代码点火器删除数据库中的活动记录

Question

控制器：

public function delete()
{
    $id=$this->uri->segment(3);
    $this->book_model->deletepost($id);
    $data['books']=$this->book_model->getposts();
    $this->load->view('showbooks',$data);
}

模型：

public function getposts()
{
  $posts=$this->db->get('books');
  $books=array();
  foreach ($posts->result() as $row) 
  {
    $books=array(
      'book_id' => $row->bookid,
      'book_name' => $row->booktitle,
      'book_author' => $row->bookauthor,
      'book_year' => $row->bookyear,
      'book_isbn' => $row->bookisbn,
      'book_publisher' => $row->bookpublisher
    );
  }
  return $books;
}

public function deletepost($id)
{
  $this->db->where('id',$id);
  $this->db->delete('books');
}

问题是我无法删除记录。这是错误：Unknown column 'id' in 'where clause'

DELETE FROM `books` WHERE `id` = 0

Answer 1

当您收到帖子时，列名称为book_id. 当您删除是id. 所以也许你需要把它改成book_id.

同样$this->uri->segment(3)在这种情况下将返回 null，因为function delete()没有参数。更多详情请阅读此处

但我会做出一些改变：

控制器：

public function delete()
{
    $id=$this->uri->segment(3); // Try to write any id here, or in function put parameter
    $this->book_model->deletepost($id);
    $data['books']=$this->book_model->getposts();
    $this->load->view('showbooks',$data);
}

模型：

public function getposts() {
  return $this->db->get('books')->result_array();
}

public function deletepost($id) {
  $this->db->where('book_id',$id); // I change id with book_id
  $this->db->delete('books');
}