喂,
我写了一个查询,我想显示当前用户未关注的用户列表,但我只显示2条记录,而当我删除限制时,它显示了除我关注的用户之外的所有用户很好,但是我不知道为什么我将限制设为5时只显示2个用户,所以前3个用户没有显示是因为它是我遵循的脚本,所以我无法正确解释但是,我感谢您的评论,因此我可以做出更多相应的解释
<?php
$sql = $this->db->limit(5);
$sql = $this->db->get('users');
foreach($sql->result() as $data):
$sql1 = $this->db->get_where('followers', array('user_id' => $data->id));
$sql2 = $this->db->get_where('followers', array('user_id' => $data->id, 'follower_id' => $user_id));
if($sql2->num_rows() != 0):
echo $data->username;
endif;
endforeach;
?>
表结构关注者
id(int)
user_id(int)
follower_id(int)
表结构用户
id(int)
username(varchar)
email(varchar)
password(varchar)
最佳答案
<?php
$this->db->start_cache();
$sql = $this->db->limit(5);
$this->db->stop_cache();
$sql = $this->db->get('users');
$this->db->flush_cache();
foreach($sql->result() as $data):
$this->db->start_cache();
$sql1 = $this->db->get_where('followers', array('user_id' => $data->id));
$this->db->flush_cache();
$this->db->start_cache();
$sql2 = $this->db->get_where('followers', array('user_id' => $data->id, 'follower_id' => $user_id));
$this->db->flush_cache();
if($sql2->num_rows() != 0):
echo $data->username;
endif;
endforeach;
?>