MongoDB sort works only on a section of the collection

I have a PHP-MongoDB project. I'm using:

• CodeIgniter
• PHP MongoDB Driver
• Xampp
• The MongoDB Connector from vvvlad

I have a problem with the sorting method.

I have this collection (notice the ['order'] property):

[4d642296bb3dfde40c000002] => Array
    (
        [_id] => MongoId Object
            (
                [$id] => 4d642296bb3dfde40c000002
            )

        [project_id] => 4d642296bb3dfde40c000001
        [parent_id] => 4d642296bb3dfde40c000001
        [version] => 0
        [title] => Introducción
        [body] => Introducción Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        [order] => 0
    )

[4d642296bb3dfde40c000003] => Array
    (
        [_id] => MongoId Object
            (
                [$id] => 4d642296bb3dfde40c000003
            )

        [project_id] => 4d642296bb3dfde40c000001
        [parent_id] => 4d642296bb3dfde40c000001
        [version] => 0
        [title] => Marco Contextual
        [body] => Marco Contextual Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        [order] => 2
    )

[4d642296bb3dfde40c000004] => Array
    (
        [_id] => MongoId Object
            (
                [$id] => 4d642296bb3dfde40c000004
            )

        [project_id] => 4d642296bb3dfde40c000001
        [parent_id] => 4d642296bb3dfde40c000001
        [version] => 0
        [title] => Marco Conceptual
        [body] => Marco Conceptual Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        [order] => 3
    )

[4d642296bb3dfde40c000005] => Array
    (
        [_id] => MongoId Object
            (
                [$id] => 4d642296bb3dfde40c000005
            )

        [project_id] => 4d642296bb3dfde40c000001
        [parent_id] => 4d642296bb3dfde40c000001
        [version] => 0
        [title] => Capitulo I
        [body] => Capitulo I Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        [order] => 4
    )

[4d642296bb3dfde40c000006] => Array
    (
        [_id] => MongoId Object
            (
                [$id] => 4d642296bb3dfde40c000006
            )

        [project_id] => 4d642296bb3dfde40c000001
        [parent_id] => 4d642296bb3dfde40c000001
        [version] => 1
        [title] => Capitulo II
        [body] => Capitulo II Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        [order] => 5
    )

[4d642296bb3dfde40c000007] => Array
    (
        [_id] => MongoId Object
            (
                [$id] => 4d642296bb3dfde40c000007
            )

        [project_id] => 4d642296bb3dfde40c000001
        [parent_id] => 4d642296bb3dfde40c000001
        [version] => 0
        [title] => Conclusión
        [body] => Conclusión Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        [order] => 6
    )

[4d6422a7bb3dfde40c000008] => Array
    (
        [_id] => MongoId Object
            (
                [$id] => 4d6422a7bb3dfde40c000008
            )

        [project_id] => 4d642296bb3dfde40c000001
        [parent_id] => 4d642296bb3dfde40c000001
        [v开发者_如何学运维ersion] => 0
        [title] => i1
        [body] => New Lorem Ipsum
        [order] => 1
    )

That I get from this:

function get_entries(){

    $project_id = key($this->projects_model->get_project());

    $data=array(
        'project_id' => $project_id
    );

    return $this->mdb->get(
        $this->mdb->sinapsisDB->entries,
        $data,
        array('order'=>1)
    );
}

As you can see I'm trying to sort the results using the ['order'] attribute, but the returned array is not sorted that way, is noteworthy that the first 6 indexes are created on a loop all at the same time, and the last one (that is not in order) is created later by a function that searches the desired order for the new entry and make the necessary ['order'] operations to make them fit in place.

At first I thought that the 'get' method from the vvvlad connector was not working but the same happens when I try

db.entries.find().sort({$order:1})

in the Mongo Client

I think this has some relation with 'indexed values' but I don't undestand why this simple sorting method does not work.

Thanks in advance for you time :)

I just ran the following test on Mongo and everything looks correct:

db.foo.drop()
db.foo.insert( { text : "blah", order : 1 } )
db.foo.insert( { text : "bl", order : 0 } )
db.foo.insert( { text : "blahblah", order : 2 } )
printjson(db.foo.find().sort( { order : 1 } ).toArray())

I am not familiar with vvvlad's code but there is definitely a problem with your shell example.

db.entries.find().sort({$order:1})

The $order is incorrect (no $).

Are you sure that vvvlad's code supports sorting?