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How to implement like query in mongodb


How to implement like query in mongodb

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How to implement like query in mongodb
Tag : node.js , By : Moe Skeeto
Date : January 12 2021, 07:00 PM

With these it helps I want to make a query with multiple conditions but the like query is not working: , Try something like this:
availableColors : new Regex('/.*'+req.query.color+'.*/')

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How do I implement search filter query using mongodb?


Tag : php , By : Ben Brown
Date : December 01 2020, 05:00 PM
around this issue As a solution to above mentioned issue please try executing following code snippet
    $lang_id = 2;
    $format = ''; //user not selected
    $status = ''; //user not selected
    $filter=array();
    if(!empty($lang_id))
    {
      $filter['language']=$lang_id;
    }
    if(!empty($format))
    {
      $filter['format']=$format;
    }
    if(!empty($status))
    {
      $filter['status']=$status;
    }

    $request =  $collection->find($filter);

How to implement MongoDB nested $elemMatch Query in C#


Tag : chash , By : jumpingmattflash
Date : March 29 2020, 07:55 AM
wish of those help Well, honestly writing queries in C# are bit tricky but you can always play a trick.
var bsonQuery = "{'Details.a':{$elemMatch:{$elemMatch:{DeviceName : /.*Name0.*/}}}}";
var filter = MongoDB.Bson.Serialization.BsonSerializer.Deserialize<BsonDocument>(bsonQuery);

var result = col.FindSync (filter).ToList();

How to implement MongoDB query in Laravel 5?


Tag : mongodb , By : user121405
Date : March 29 2020, 07:55 AM
this one helps. Perform raw expressions on the internal MongoCollection object to run the aggregation:
$result = DB => collection('PMS')->raw(function ($collection){
    return $collection->aggregate(array(
        array( '$match' => array( "PanelID" => "A00898" ) ),
        array( '$project' => array( 'EventTS' => 1, 'MainsPower' => 1 ) ),
        array(
            '$unwind' => array(
                'path' => "$MainsPower",
                'includeArrayIndex' => "arrayIndex",
                'preserveNullAndEmptyArrays' => true
            )
        ),
        array(
            '$project' => array(
                '_id' => 0,
                'MainsPower' => 1,
                'timestamp' => array(
                    "$add" => array(
                        "$EventTS",
                        array( "$multiply" => array( 60000, "$arrayIndex" ) )
                    )
                )
            )
        )
    ));
});

Query MongoDB to implement typheahead in ui


Tag : mongodb , By : ugufugu
Date : March 29 2020, 07:55 AM
I hope this helps you . I am trying to query my MongoDB to find all the matching name fields in the documents of my collection from the typeahead of my angular ui, I have to display the contents of the matched documents in table format, I referred few docs and wrote this API, when I try to test in Advanced REST client , it displays connection timed out, can anyone suggest me where I am going wrong? My API code , no need nested function searchEnterprise(). just use it
var search = function(req, res){
    var name = req.params.name;

    // can also use $regex like bellow line
    //enterprise.find({'name': {$options:'i', $regex: name }}, or
    // enterprise.find({"name": '/'+ name + '/i'}

    enterprise.find({'name': {$options:'i', $regex: name }},function(err, data){
        if (err){
            console.log('err',err);
            return res.status(400).send({msg: "error"});
        } else {
            console.log(data);
            return res.json(data); 
            // or
            //return res.status(200).send(data);
        }
   });
};

module.exports = {
     searchEnterprise : search
};

How to implement query schema on mongodb for ecommerce in C#


Tag : chash , By : Lathentar
Date : March 29 2020, 07:55 AM
seems to work fine Very nice question. Since you can't know the type being a future implementation and such, then you can only go with detail/value implementation.
Instead of attributes, your list could contain a data structure like this:
public class ProductDetail {
    public DetailType Type;
    public string Value;
}
`[{ Type: 1, Value: "4k"}]`
public class ProductDetail {
    public string Type;
    public string Value;
}

`[{ Type: "Resolution", Value: "4k"}]`
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