由于查询,人们在聊天页面上显示了两次 [英] people are shown twice on the chat page because of query
问题描述
我正在尝试使用 php 制作一个 facebook 风格的聊天页面.但是我在显示旧对话时遇到问题.您知道 facebook 左侧边栏显示对话,当您创建新消息时,用户可以在他的消息页面上看到您的消息.问题:当我向某人发送消息时,他们会从左侧边栏中看到我的消息两次.我还从左侧边栏中看到了两次我的消息.
I am trying to make a facebook style chat page using php. But i have a problem to showing old conversations. You know that facebook left sidebar showing conversations and when you create new message user can see your message on his message page. PROBLEM: when i send message to someone they see my message two times from the left sidebar. Also i see my message two times from the left sidebar.
我创建了这个 SQLfiddle
I have created this SQLfiddle
这里是我的查询函数:
public function ChatUserList($uid){
$uid = mysqli_real_escape_string($this->db,$uid);
$ChatUserListQuery = mysqli_query($this->db,"SELECT DISTINCT C.to_user_id,
C.from_user_id,U.user_name, U.user_fullname
FROM chat C INNER JOIN users U
ON U.userid = C.from_user_id WHERE U.userid = '$uid'
AND (C.from_user_id = '$uid' OR C.to_user_id = '$uid')")
or die(mysqli_error($this->db));
while($row=mysqli_fetch_array($ChatUserListQuery)) {
// Store the result into array
$data[]=$row;
}
if(!empty($data)) {
// Store the result into array
return $data;
}
}
注意:$uid
是登录用户 ID.像 $uid = '2';
Note: The $uid
is loged in user id. Like $uid = '2';
我像这样在屏幕上打印出来.
And I print it on the screen like this.
$ConversationUserList = $Get->ChatUserList($uid);
if($ConversationUserList){
foreach($ConversationUserList as $cData){
$conversationUserID = $cData['to_user_id'];
$conversationUserAvatar = $Get->UserAvatar($conversationUserID, $base_url);
$conversationLastMessage = $Get->ChatLastMessage($uid,$conversationUserID);
$conversationUserFullName = $Get->UserFullName($conversationUserID);
$conversationUserName = $Get->GetUserName($conversationUserID);
if($conversationUserID == $uid){
$conversationUserID = $cData['from_user_id'];
$conversationUserAvatar = $Get->UserAvatar($conversationUserID, $base_url);
$conversationLastMessage = $Get->ChatLastMessage($uid,$conversationUserID);
$conversationUserFullName = $Get->UserFullName($conversationUserID);
$conversationUserName = $Get->GetUserName($conversationUserID);
}
$time = $conversationLastMessage['message_created_time'];
$conversationLastMessageTime = date("c", $time);
$getConversationLastMessage = $conversationLastMessage['message_text'];
echo '
<!---->
<li class="_5l-3 _1ht1 _1ht2 getuse" data-id="'.$conversationUserID.'" data-user="'.$conversationUserName.'">
<img src="'.$conversationUserAvatar.'" class="img_avatar">
<span>
<abbr class="_1ht7 timeago" id="time'.$conversationUserID.'" title="'.$conversationLastMessageTime.'">
'.$conversationLastMessageTime.'</abbr>
</span>
<span class="_1qt5 _5l-3">
<span class="txt_st12" id="msg'.$conversationUserID.'">
'.htmlcode($getConversationLastMessage).'
</span>
</span>
</li> ';
}
}
推荐答案
行为正常,但您应该限制为 1 并按时间排序以选择最近的消息.
The behavior is normal, but you should limit by 1 and sort by time to select the most recent message.
同样在你的 SQL 小提琴中,我猜你在用户和用户之间混淆.
Also in your SQL fiddle I guess you're mixing up from user and to user.
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