2dsphere indexes get re-created everytime

[buffcode]

Bug Report

Q	A
BC Break	no
Version	2.5.x

Summary

Indexes of type 2dsphere are always re-created.

Current behavior

Because the server-side options contain a 2dsphereIndexVersion a mismatch is caused when comparing index options.

How to reproduce

/**
 * @ODM\Document
 * @ODM\Index(keys={"coordinatesWith2DIndex"="2d"})
 * @ODM\Index(keys={"coordinatesWithSphereIndex"="2dsphere"})
 */
class GeoIndexDocument
{
    /**
     * @ODM\Id
     *
     * @var string|null
     */
    public $id;

    /** @ODM\Field(type="hash") */
    public $coordinatesWith2DIndex;

    /** @ODM\Field(type="hash") */
    public $coordinatesWithSphereIndex;
}

For debugging purposes add the following code to \Doctrine\ODM\MongoDB\SchemaManager::updateDocumentIndexes, right before $collection->dropIndex(...):

dump('Dropping index ' . $mongoIndex['name'] . ' on ' . $documentName);

Run:

$ bin/console doctrine:mongodb:schema:update
Dropping index coordinates_2dsphere on GeoIndexDocument
Updated indexes for all classes
Updated validation for all classes

Expected behavior

Do not drop/re-create 2dsphere indexes

[alcaeus]

Fixed in #2575.