How to get order items ids to get some product meta data?
<p>I'm trying to extract item meta value from Woocommerce's orders by using:</p>

<pre><code>$data = wc_get_order_item_meta( $item, '_tmcartepo_data', true );
</code></pre>

<p>However, I can't find a way to get order_item_id as the first parameter (using get_items)</p>

<pre><code>global $woocommerce, $post, $wpdb;
$order = new WC_Order($post-&gt;ID);
$items = $order-&gt;get_items(); 

foreach ( $items as $item ) {
    $item_id = $item['order_item_id']; //???
    $data = wc_get_order_item_meta( $item_id, '_tmcartepo_data', true );
    $a = $data[0]['value'];
    $b = $data[1]['value'];
    echo $a;
    echo $b;
}
</code></pre>

<p>And I mean this order item_id (1 and 2)</p>

<p><a href="http://i.stack.imgur.com/8OJ7U.jpg" rel="noreferrer">Order_item_id in database - Image</a></p>

<p>How can I don that?</p>

<p>Thanks.</p>