AbstractMetric.php

<?php

namespace MyNamespace\YouTube;

use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;

/**
 * @ODM\Document(db="analytics", collection="youtube")
 * @ODM\InheritanceType("SINGLE_COLLECTION")
 * @ODM\DiscriminatorField("type")
 * @ODM\DiscriminatorMap({
 *     "video" = "VideoMetric",
 *     "channel" = "ChannelMetric"
 * })
 */
abstract class AbstractMetric
{
    /**
     * @ODM\Id(strategy="none")
     */
    protected $id;

    /**
     * @ODM\Field(name="id", type="string")
     *
     * @var string
     */
    protected $elementId;

    /**
     * @ODM\Field(name="timestamp", type="date")
     *
     * @var \DateTime
     */
    protected $time;
}

ChannelMetric.php

<?php

namespace MyNamespace\YouTube;

use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;

/**
 * @ODM\Document
 */
class ChannelMetric extends AbstractMetric
{
    /**
     * @ODM\EmbedOne(name="data", targetDocument="ChannelMetricData")
     *
     * @var ChannelMetricData
     */
    public $data;
}

ChannelMetricData.php

<?php

namespace MyNamespace\YouTube;

use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;

/**
 * @ODM\EmbeddedDocument
 */
class ChannelMetricData
{
    /**
     * @ODM\Field(name="account", type="string")
     *
     * @var string
     */
    protected $account;

    /**
     * @ODM\Field(name="title", type="string")
     *
     * @var string
     */
    protected $title;

    /**
     * @ODM\Field(name="subscribers", type="int")
     *
     * @var integer
     */
    protected $subscribers;

    /**
     * @ODM\Field(name="channel_views", type="int")
     *
     * @var integer
     */
    protected $channelViews;

    /**
     * @ODM\Field(name="upload_views", type="int")
     *
     * @var integer
     */
    protected $uploadViews;

    /**
     * @ODM\Field(name="uploads", type="int")
     *
     * @var integer
     */
    protected $uploads;
}

VideoMetric.php

<?php

namespace MyNamespace\YouTube;

use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;

/**
 * @ODM\Document
 */
class VideoMetric extends AbstractMetric
{
    /**
     * @ODM\EmbedOne(name="data", targetDocument="VideoMetricData")
     *
     * @var VideoMetricData
     */
    public $data;
}

VideoMetricData.php

<?php

namespace MyNamespace\YouTube;

use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;

/**
 * @ODM\EmbeddedDocument
 */
class VideoMetricData
{
    /**
     * @ODM\Field(name="id", type="string")
     */
    protected $id;

    /**
     * @ODM\Field(name="account", type="string")
     *
     * @var string
     */
    protected $account;

    /**
     * @ODM\Field(name="title", type="string")
     *
     * @var string
     */
    protected $title;

    /**
     * @ODM\Field(name="views", type="int")
     *
     * @var integer
     */
    protected $views;

    /**
     * @ODM\Field(name="likes", type="int")
     *
     * @var integer
     */
    protected $likes;

    /**
     * @ODM\Field(name="dislikes", type="int")
     *
     * @var integer
     */
    protected $dislikes;

    /**
     * @ODM\Field(name="comments", type="int")
     *
     * @var integer
     */
    protected $comments;
}