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introdurre join della tabella relationship
Posted by: stefano searedone
Date: December 05, 2011 03:03PM

Sera a tutti, spero che possiate risolvermi questo immenso problema

ho 4 tabelle

users
messages
comments
relationship

e una functions ..

la functions originale è questa e tutto funziona


<?php

class Wall_Updates {

public $perpage = 10; // Uploads perpage



// Updates
public function Updates($uid,$lastid)
{
// More Button
$morequery="";
if($lastid)
$morequery=" and M.msg_id<'".$lastid."' ";
// More Button End

$query = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created, U.username,M.uploads FROM messages M, users U WHERE M.uid_fk=U.uid and M.uid_fk='$uid' $morequery order by M.msg_id desc limit " .$this->perpage) or die(mysql_error());

while($row=mysql_fetch_array($query))
$data[]=$row;
return $data;

}
// Updates
public function Total_Updates($uid)
{

$query = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created, U.username,M.uploads FROM messages M, users U WHERE M.uid_fk=U.uid and M.uid_fk='$uid' $morequery order by M.msg_id ") or die(mysql_error());
$data=mysql_num_rows($query);
return $data;

}

//Comments
public function Comments($msg_id,$second_count)
{
$query='';
if($second_count)
$query="limit $second_count,2";
$query = mysql_query("SELECT C.com_id, C.uid_fk, C.comment, C.created, U.username FROM comments C, users U WHERE C.uid_fk=U.uid and C.msg_id_fk='$msg_id' order by C.com_id asc $query") or die(mysql_error());
while($row=mysql_fetch_array($query))
$data[]=$row;
if(!empty($data))
{
return $data;
}
}


//Avatar Image
//From database
public function Profile_Pic($uid)
{
$query = mysql_query("SELECT profile_pic FROM `users` WHERE uid='$uid'") or die(mysql_error());
$row=mysql_fetch_array($query);
if(!empty($row['profile_pic']))
{
$profile_pic_path=$base_url.'profile_pic/';
$data= $profile_pic_path.$row['profile_pic'];
return $data;
}
else
{
$data="icons/default.jpg";
return $data;
}
}
// Gravatar Image
public function Gravatar($uid)
{
$query = mysql_query("SELECT email FROM `users` WHERE uid='$uid'") or die(mysql_error());
$row=mysql_fetch_array($query);
if(!empty($row))
{
$email=$row['email'];
$lowercase = strtolower($email);
$imagecode = md5( $lowercase );
$data="http://www.gravatar.com/avatar.php?gravatar_id=$imagecode";;
return $data;
}
else
{
$data="default.jpg";
return $data;
}
}

//Insert Update
public function Insert_Update($uid, $update,$uploads)
{
$update=mysql_real_escape_string($update);
$time=time();
$ip=$_SERVER['REMOTE_ADDR'];
$query = mysql_query("SELECT msg_id,message FROM `messages` WHERE uid_fk='$uid' order by msg_id desc limit 1") or die(mysql_error());
$result = mysql_fetch_array($query);

if ($update!=$result['message']) {
$uploads_array=explode(',',$uploads);
$uploads=implode(',',array_unique($uploads_array));
$query = mysql_query("INSERT INTO `messages` (message, uid_fk, ip,created,uploads) VALUES (N'$update', '$uid', '$ip','$time','$uploads')") or die(mysql_error());
$newquery = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created, U.username FROM messages M, users U where M.uid_fk=U.uid and M.uid_fk='$uid' order by M.msg_id desc limit 1 ");
$result = mysql_fetch_array($newquery);

return $result;
}
else
{
return false;
}


}

//Delete update
public function Delete_Update($uid, $msg_id)
{
$query = mysql_query("DELETE FROM `comments` WHERE msg_id_fk = '$msg_id' and uid_fk='$uid' ") or die(mysql_error());
$query = mysql_query("DELETE FROM `messages` WHERE msg_id = '$msg_id' and uid_fk='$uid'") or die(mysql_error());
return true;

}

//Image Upload
public function Image_Upload($uid, $image)
{
//Base64 encoding
$path="uploads/";
$img_src = $path.$image;
$imgbinary = fread(fopen($img_src, "r"), filesize($img_src));
$img_base = base64_encode($imgbinary);
$ids = 0;
$query = mysql_query("insert into user_uploads (image_path,uid_fk)values('$image' ,'$uid')") or die(mysql_error());
$ids = mysql_insert_id();
return $ids;
}

//get Image Upload
public function Get_Upload_Image($uid,$image)
{
if($image)
{
$query = mysql_query("select id,image_path from user_uploads where image_path='$image'") or die(mysql_error());
}
else
{
$query = mysql_query("select id,image_path from user_uploads where uid_fk='$uid' order by id desc ") or die(mysql_error());
}

$result = mysql_fetch_array($query);

return $result;
}

//Id Image Upload
public function Get_Upload_Image_Id($id)
{
$query = mysql_query("select image_path from user_uploads where id='$id'") or die(mysql_error());
$result = mysql_fetch_array($query);

return $result;
}

//Insert Comments
public function Insert_Comment($uid,$msg_id,$comment)
{
$comment=mysql_real_escape_string($comment);

$time=time();
$ip=$_SERVER['REMOTE_ADDR'];
$query = mysql_query("SELECT com_id,comment FROM `comments` WHERE uid_fk='$uid' and msg_id_fk='$msg_id' order by com_id desc limit 1 ") or die(mysql_error());
$result = mysql_fetch_array($query);

if ($comment!=$result['comment']) {
$query = mysql_query("INSERT INTO `comments` (comment, uid_fk,msg_id_fk,ip,created) VALUES (N'$comment', '$uid','$msg_id', '$ip','$time')") or die(mysql_error());
$newquery = mysql_query("SELECT C.com_id, C.uid_fk, C.comment, C.msg_id_fk, C.created, U.username FROM comments C, users U where C.uid_fk=U.uid and C.uid_fk='$uid' and C.msg_id_fk='$msg_id' order by C.com_id desc limit 1 ");
$result = mysql_fetch_array($newquery);

return $result;
}
else
{
return false;
}

}

//Delete Comments
public function Delete_Comment($uid, $com_id)
{
$query = mysql_query("DELETE FROM `comments` WHERE uid_fk='$uid' and com_id='$com_id'") or die(mysql_error());
return true;

}



}

?>


se aggiungo la relazione con la tabella relationship che serve a far si che i post, postati si vedano solo dagli amici che sono amici di chi posta, un po' il meccanismo di facebook ..

CREATE TABLE IF NOT EXISTS `relationship` (
`id` int(10) NOT NULL AUTO_INCREMENT,
`user_1` bigint(20) NOT NULL,
`user_2` bigint(20) NOT NULL,
`amico` enum('S','N') NOT NULL DEFAULT 'N',
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=67 ;

--
-- Dump dei dati per la tabella `relationship`
--

INSERT INTO `relationship` (`id`, `user_1`, `user_2`, `amico`) VALUES
(12, 54, 57, 'S'),
(9, 54, 57, 'S'),
(8, 54, 55, 'S'),
(7, 54, 58, 'N'),
(65, 55, 54, 'S'),
(66, 54, 61, 'S');


in questo modo tutto funziona ma come mi logo con un'altro utente vedo il post postato dal mio amico ripetuto per tutti gli utenti registrati come se fosse un refuso ...

<?php


class Wall_Updates {

public $perpage = 100; // Uploads perpage



// Updates
public function Updates($uid,$lastid)
{
// More Button
$morequery="";
if($lastid)
$morequery=" and M.msg_id<'".$lastid."' ";
// More Button End

$query = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created, U.username, M.uploads FROM messages M, users U WHERE M.uid_fk='$uid' AND M.uid_fk = U.uid OR M.uid_fk IN ( SELECT user_1 FROM relationship AS R WHERE R.user_2 = '$uid' AND R.amico = 'S' ) OR M.uid_fk IN ( SELECT user_2 FROM relationship AS R WHERE R.user_1 = '$uid' AND R.amico = 'S') $morequery order by M.msg_id desc limit " .$this->perpage) or die(mysql_error());

while($row=mysql_fetch_array($query))
$data[]=$row;

return $data;


}


// Updates
public function Total_Updates($uid)
{

$query = mysql_query("SELECT M.msg_id, M.uid_fk, M.message, M.created, U.username, M.uploads FROM messages M, users U WHERE M.uid_fk = U.uid AND M.uid_fk='$uid' AND M.uid_fk = U.uid OR M.uid_fk IN ( SELECT user_1 FROM relationship AS R WHERE R.user_2 = '$uid' AND R.amico = 'S' ) OR M.uid_fk IN ( SELECT user_2 FROM relationship AS R WHERE R.user_1 = '$uid' AND R.amico = 'S') $morequery order by M.msg_id ") or die(mysql_error());

$data=mysql_num_rows($query);
return $data;

}


Allora mi sono detto faccio una join, ma non riesco a capire come mai mi da' sempre un errore , ho provato così ma l'errore è questo:

Unknown column 'messages.usersuid' in 'on clause'

$query = mysql_query( "SELECT * FROM
messages INNER JOIN users ON (messages.usersuid=user.uid )
INNER JOIN relationship ON ( messages.relationshipid = relationship.id AND user_2 = '$uid' )
OR messages.uid_fk IN
( messages.relationshipid = relatioship.id AND user_1 = '$uid' )
WHERE
messages.uid_fk='$uid' AND relationship.user_1 = 'S' AND relationship.user_2 = 'S' $morequery order by M.msg_id desc limit " .$this->perpage) or die(mysql_error());

Help spero che qualcuno mi aiuto è un mese che provo e riprovo

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introdurre join della tabella relationship
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December 05, 2011 03:03PM


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