Question

当我的用户登录活动的模型时。如果用户在更新属于用户标识的行之前已登录。否则应该插入行。

问题：目前它只是更新与之前相同的行。如果用户ID之前没有登录，它应该插入一个新行。

如何修复模型上的问题。

<?php 

class Model_account_activity extends CI_Model {

  public function updateActivity($key, $data) {
      $data['user_id'] = $this->session->userdata('user_id');

      if (isset($data['user_id'])) {
         $user_id = $data['user_id'];
      } else {
         $user_id = 0;
      }

      $query = $this->db->query("UPDATE `" . $this->db->dbprefix . "user_activity` SET 
         `user_id` = '" . (int)$user_id . "', 
         `key` = " . $this->db->escape($key) . ", 
         `data` = " . $this->db->escape(serialize($data)) . ",
         `date_added` = NOW()
      ");

      if ($query == FALSE) {
        $this->addActivity();
        return true;
      } else {
        return false;
      }
   }

    public function addActivity($key, $data) {
      $data['user_id'] = $this->session->userdata('user_id');

      if (isset($data['user_id'])) {
         $user_id = $data['user_id'];
      } else {
         $user_id = 0;
      }

      $this->db->query("INSERT INTO `" . $this->db->dbprefix . "user_activity` SET 
         `user_id` = '" . (int)$user_id . "', 
         `key` = " . $this->db->escape($key) . ", 
         `data` = " . $this->db->escape(serialize($data)) . ",
         `date_added` = NOW()
      ");
   }
}

Answer 1

通过唯一DB或ID从primary key获取结果，然后检查查询结果。如果结果计数为0，则可以插入其他更新。实施例...

$this->db->where('column_name', $user_id); //Unique column or primary_key .It may be $user_id
$query = $this->db->get('table_name');
if($query->num_rows == 0)
{
    //Insert query
}
else
{
    //Update query
}

Answer 2

感谢@Please Wait现在所有工作，我的工作原理如何。

<?php 

class Model_account_activity extends CI_Model {

  public function activity($key, $data) {
   $user_id = $this->session->userdata('user_id');

   $this->db->where('user_id', $user_id);
   $query = $this->db->get('user_activity');

   $data['user_id'] = $this->session->userdata('user_id');

   if (isset($data['user_id'])) {
      $user_id = $data['user_id'];
   } else {
      $user_id = 0;
   }

   if($query->num_rows() == FALSE) {

      $data = array(
        'user_id' => $user_id,
        'key' => $key,
        'data' => serialize($data),
        'date_added' => mdate('%Y-%m-%d %H:%i:%s', now())

      );
      $this->db->insert_id();
      $this->db->insert('user_activity', $data);

   } else {

      $data = array(
        'user_id' => $user_id,
        'key' => $key,
        'data' => serialize($data),
        'date_added' => mdate('%Y-%m-%d %H:%i:%s', now())

      );
      $this->db->where('user_id', $user_id);
      $this->db->update('user_activity', $data);
   }
  }
}

如果不更新，则插入新行

2 个答案: