Plugin now not returning "_value" on custom fields

Hi,

I’m a mobile app developer that was using your plugin to export news and events from a wordpress site. My client has updated the theme on their site and the plugin is no longer exporting the custom_fields values. e.g. There is a custom field call “news_image” that’s an image id, I used to “news_image” (the id) and “news_image_value” (the URL), now I’m just getting “news_image”. The same is happening with custom_field dates.

I can’t find where the “_value” stuff is added? It is easy to add this to the plugin’s code but this added code will disappear with an updated.

Any help to either add my own code that’s plugin-update-safe OR why the plugin has stopped returning “_value” fields would be great.

Thanks
Dave

https://wordpress.org/plugins/json-api/