How to use WP_Query to get nested values of an object? - wordpress

Question

I have searched a lot online with no luck on searching nested values
lets say i have a users array
[
{
id: 0,
billing: {
phone: "999999"
}
},
{
id: 1,
billing: {
phone: "777777"
}
}
]
I want to use WP_Query to filter by phone number is it possible to do that ? and how ?
function get_customers(WP_REST_Request $request) {
$param = $request['phone'];
$args = array(
'post_type' => 'customer',
'posts_per_page' => 1,
'meta_query' => array(
'key' => 'billing.phone',
'value' => $param,
'compare' => '='
)
);
$customers = new WP_Query($args);
return $customers->posts;
}
add_action( 'rest_api_init', function() {
register_rest_route('rc/v1', 'customers/(?P<phone>\d+)', [
'methods' => 'GET',
'callback' => 'get_customers'
]);
});

Answer 1

First, your meta_query syntax is wrong it's should be inside one more array check here and If your post meta key is 'billing.phone' then the below code will work fine.
function get_customers( WP_REST_Request $request ) {
$param = $request['phone'];
$args = array(
'post_type' => 'customer',
'posts_per_page' => 1,
'meta_query' => array(
array(
'key' => 'billing.phone',
'value' => $param,
'compare' => '='
)
)
);
$customers = new WP_Query($args);
return $customers->posts;
}
add_action( 'rest_api_init', function() {
register_rest_route('rc/v1', 'customers/(?P<phone>\d+)', [
'methods' => 'GET',
'callback' => 'get_customers'
]);
});