I finded a data my mongodb database. I want be update a array's field this data.
My data is here:
http://paste.ubuntu.com/8447715/
I want will find this data and update home adress. I am trying:
$Data = array(
'$set' => array(
'address.name' => 'home'
)
); <br>
$users->update(array('username' => 'micheal', 'address.name' => 'hame') ,$Data);
What's wrong ?
My english is bad,sorry
You need to use the $ operator to update the address that matches the selection;
$Data = array(
'$set' => array(
'address.$.name' => 'home'
)
);
$users->update(array('username' => 'micheal', 'address.name' => 'hame') ,$Data);
Related
In mongo shell the query:
db.collections.distinct('user_id');
simply gives the distinct documents.
I am working on phalcon and there is no option like
Collections::distinct()
So how do i query distinct in phalcon. Please help me
Perhaps Phalcon's answer in the forum could help: https://forum.phalconphp.com/discussion/6832/option-for-function-distinct-phalconmvccollection
They suggest using aggregations:
$data = Article::aggregate(
array(
array(
'$project' => array('category' => 1)
),
array(
'$group' => array(
'_id' => array('category' => '$category'),
'id' => array('$max' => '$_id')
)
)
)
);
i am working on mongodb & php & want to retrive data based on multiple conditions.
I want to retrive forms whose form_status is both Active & Draft only
My query is:
$formData = $formInfo->find(array('team_id' => $_GET['id'], '$and' =>array('form_status' => 'Active','form_status' => 'Draft')));
It is not working. What could be the right syntax in PHP??
The $and operator takes a "real array" of documents as it's argument. In PHP you wrap the array to produce that kind of syntax:
$formData = $formInfo->find(
array(
'team_id' => $_GET['id'],
'$and' => array(
array( 'form_status' => 'Active' ),
array( 'form_status' => 'Draft' )
)
)
);
Note that this really woudn't make any sense unless "form_status" is actually and array itself. In which case the $all operator is a much cleaner approach:
$formData = $formInfo->find(
array(
'team_id' => $_GET['id'],
'form_status' => array(
'$all' => array( 'Active', 'Draft' )
)
)
);
And again if this field was not an array then you really meant $or but that can also be more clearly written for the same field with $in:
$formData = $formInfo->find(
array(
'team_id' => $_GET['id'],
'form_status' => array(
'$in' => array( 'Active', 'Draft' )
)
)
);
So $all is to $and what $in is to $or, but just allows you to use the same field without specifying the full document form
I have some difficulty in getting Mongodb aggregate to work. It keeps giving me null. Please help. Below are the codes written in php. Thanks.
What I want to do is to sum up the values of 2 fields, Requests and Responses, between 2 particular dates
try {
$mongodb = new MongoClient("mongodb://ad:pass2word1#localhost");
$database = $mongodb->selectDB('backend');
$collection = new MongoCollection($database, 'RequestSummary');
$pipeline = array(
array(
'$group' => array(
'_id' => array(
'request' => array('$sum' => '$Requests'),
'response' => array('$sum' => '$Responses')
)
)
),
array(
'$match' => array(
'RequestDate' => array(
'$gte' => intval($_SESSION['range_from']),
'$lte' => intval($_SESSION['range_to'])
)
)
)
);
$collection->aggregate($pipeline);
var_dump($g);
} catch (MongoConnectionException $exc) {
echo $exc->getTraceAsString();
}
The _id of your $group can't contain aggregation operators like $sum. Those sums need to be defined as fields at the same level as _id. If you don't want to group on a specific field you can use NULL for the _id like this:
array(
'$group' => array(
'_id' => NULL,
'request' => array('$sum' => '$Requests'),
'response' => array('$sum' => '$Responses')
)
),
I am trying to use the aggregation function to display info in a chart. For this example, a document in the collection looks like this (excluding unnecessary fields for this query):
{
'locid' : <someid>, #Reference to a city & state collection
'collat' : <dateobj>, #a date object when this entry was saved
'pid' : <someid>, #Reference to a person collection
'pos' : <int> #Value I am interested in matching with location & date
}
So I basically start with a pid. I use this as my first $match parameter to limit the amount of data that gets thrown into the pipeline.
array(
'$match' => array(
'pid' => new \MongoId($pid)
)
),
So now that I have selected the correct pid, I tell it I only want/need certain fields:
array(
'$project' => array(
'pos' => 1,
'collat' => 1,
'locid' => 1
)
),
The second match is to say I only care about these locations right now ($ids contains an array of locid):
array(
'$match' => array(
'locid' => array('$in' => $ids)
)
),
And finally, I am saying group all the returned documents by collat and locid
array(
'$group' => array(
'_id' => array(
'locid' => '$locid',
'collat' => '$collat'
)
)
)
While the query completes OK and returns data, I am not getting the pos field back, it is only returning the locid and collat.
Questions
Isn't that what $project is for? I use it to tell the driver what fields I want returned?
Once I get the pos field returning as well, how can I tell the driver I only want the lowest value for each locid & collat combo pair? So say there are two entries for that date, location, and person: 4 & 8. I only care about pos=4
My end goal is to create a line chart with the X-Axis as the dates (from collat) and the Y-Axis will be the pos field, and each line will plot individual locid data.
Here is the entire parameters being sent to the aggregation driver.
$ops = array(
array(
'$match' => array(
'pid' => new \MongoId($pid)
)
),
array(
'$project' => array(
'pos' => 1,
'collat' => 1,
'locid' => 1
)
),
array(
'$match' => array(
'locid' => array('$in' => $ids)
)
),
array(
'$group' => array(
'_id' => array(
'locid' => '$locid',
'collat' => '$collat'
)
)
)
);
$out = $myCollection->aggregate($ops);
Update This is the way I got it to group & return pos without throwing an error. I need to spot check it though to make sure it's actually returning the correct values though.
array(
'$group' => array(
'_id' => array(
'locid' => '$locid',
'collat' => '$collat'
),
array('$min' => '$pos')
)
)
Aggregation query is like an SQL statement group by. You are telling {$group} what field(s) you want to 'GROUP BY' but you are not telling it how you want to aggregate the grouped information.
The {$group} you want is probably something like:
{$group : { _id : { locid: "$locid", collat: "$collat"},
pos : {$min : "$pos"}
}
}
I need to query mongodb with something like this:
("something" < X OR "something" = "nll")
AND
("someother">X OR "someother"= "nll") AND z=$z AND s=1
I've tried a few things, but can't get it to work, this is what I've tried:
find(
array(
'$or'=>array(array("something"=>array("$le",$X)),array("something"=>"nll")),
'$or'=>array(array("someother"=>array("$ge",$X)),array("someother"=>"nll"))
))
But that's getting me the OR overwritten, so I'm lost on that...
After diggin a bit more, I assembled this code that seems to be what I need, but doesn't work either:
find( array('$and'=>array( array( '$or' => array( array("something"=>array('$gte'=>$X)),array("something"=>"nll"))), array('$or' => array( array("someother"=>array('$lte'=>$X)),array("someother"=>"nll")))),"Z"=>$z, "s"=>"1");
But this doesn't work as it returns zero results and I know for sure that there are more than 2 items that match on the db. (100% certain)
$range = array('$and' => array(
array('$or' => array(
array("something" => array( "$lte" => $X)),
array("something" => "null")),
array('$or' => array(
array("someother" => array("$gte" => $X)),
array("someother" => "null"))
));