I'm using the WooCommerce REST API (http://woocommerce.github.io/woocommerce-rest-api-docs/#introduction) and are able to download Customers, Orders etc successfully.
My customer has added some custom fields to the checkout page, e.g.:
po_number
accounts_email
I would like to be able to GET these custom fields when requesting an ORDER, e.g.:
/wp-json/wc/v1/orders/4568
At the moment none of the custom fields are returned when I GET an Order. I've tried adding
?filter[meta]=true
to the request URL but that doesn't make any difference. Is there a way I can modify the GET URL to include all custom fields? Couldn't find any reference in the REST API docs to custom fields.
I have struggled like you did, but then it turns out using the newer v2 REST API solves the issue for me. So instead of:
/wp-json/wc/v1/orders/4568
I now use:
/wp-json/wc/v2/orders/4568
And custom fields will be included in the response with the key meta_data, even with those hidden fields starting with _.
来源：https://stackoverflow.com/questions/42100572/woocommerce-rest-api-get-custom-fields-for-order