php mongodb '$or' regex search - php

Question

i'm trying to query mongodb "videos" collection to find results by "title" or "tags" fields... it keeps returning 0 results even when i search for terms i know are in the title and/or tags... any help would be appreciated
<?php
$user_query = preg_replace("/[[:blank:]]+/"," ", $_GET['q']);
$arr_query = explode(' ', $user_query);
foreach ($arr_query as $q) {
$title[] = '/'. $q .'/i';
$tags[] = '/'. $q .'/i';
}
$who=array(
'$or' => array(
array('$in' => array('$regex' => $title)),
array('$in' => array('$regex' => $tags))
)
);
$vids=$videos->find($who);
?>

Answer 1

You need to specify some fields for your $in:
$who=array('$or' => array(
array('somefield' => array('$in' => array(new MongoRegex($title)))),
array('otherotherfield' => array('$in' => array(new MongoRegex($tags))))
));
So it works by saying saying: if some field is in a range of some values
http://docs.mongodb.org/manual/reference/operator/in/
Edit
That might still not work because of the embedded $regex. If this is the case then you can try:
$who=array('$or' => array(
array('somefield' => new MongoRegex($title)),
array('otherotherfield' => new MongoRegex($tags))
));
Edit
If either of those queries don't work you can do:
$who = array('$or' => array());
foreach($arr_query as $q){
$who['$or'][] = array('title' => new MongoRegex("/^$q/"));
$who['$or'][] = array('tags' => new MongoRegex("/^$q/"));
}
Something like that should work, again it is untested but if my memory serves me right that should do it.
Another edit
This works perfectly for me:
$mongo = new Mongo();
$db = $mongo->tstvid;
$videos = $db->videos;
$videos->insert(array('title' => 'test1', 'tags' => array('h','h')));
$videos->insert(array('title' => 'test2', 'tags' => array('h','h')));
$videos->insert(array('title' => 'test3', 'tags' => array('h','h')));
$videos->insert(array('title' => 'tst3', 'tags' => array('h','test')));
$user_query = preg_replace("/[[:blank:]]+/"," ", "test");
$arr_query = explode(' ', $user_query);
if (count($arr_query) > 1) {
$who = array(
'$or' => array()
);
foreach ($arr_query as $q) {
$who['$or'][] = array('title' => new MongoRegex("/^". $q ."/i"));
$who['$or'][] = array('title' => new MongoRegex("/^". $q ."/i"));
}
} else {
$regex=new MongoRegex("/^". $user_query ."/i");
$tregex=new MongoRegex("/^". $user_query ."/i");
$who=array(
'$or' => array(
array('title' => $regex),
array('tags' => $tregex)
)
);
}
$vids=$videos->find($who);
$results="";
$i=0;
foreach($vids as $vid){
$results .= "<li>".$vid['title']."</li>\n";
$i++;
}
if($i==0){
$results="<em>No results found</em>";
}
echo $results;
And it outputs:
test1
test2
test3
tst3
So I am unsure what is wrong but I would recommend double checking your script is breaking up the keywords right and the schema is being searched right by issuing these queries in the console as well.
It should be noted I also tried this with:
$user_query = preg_replace("/[[:blank:]]+/"," ", "test h");
And it worked as well.

Answer 2

$search_string = preg_replace("/[^A-Za-z0-9]/", " ", $_GET['q']);
$search_string = $search_string;
//Connecting mongoDB
$dbhost = 'localhost';
$dbname = 'yourdbname';
$port = '27017';
$m = new MongoClient();
$db = $m->$dbname;
if($m){
// select a collection
$videos = $db->videos;
// search for title and tags
$searchQuery = array(
'$or' => array(
array(
'title' => array(
'$regex' => $search_string,
),
),
array(
'tags' => array(
'$regex' => $search_string,
),
),
)
);
$cursor = $videos->find($searchQuery);
foreach ($cursor as $doc) {
var_dump($doc);
//or what ever you want
//var_dump($doc['title']);
}
else{
echo "Collection videos cant select :( <br>";die();
}
Thinks this will help. :D