Update meta_value in wp_postmeta using API

Question

I am trying to update a specific meta_key field using an API. meta_key name is _yoast_seo_redirect. it contains a redirect URL which we give in post options within wordpress.

What I am trying to achieve is, whenever someone hit the url like :

http://yoursite.com/wp-json/post_info/post?id=59&meta_value=www.google.com

it should update the post_id : 59 with meta_value : www.google.com

Write now, I am getting json error while trying to achieve this :

[
{
code: "json_no_route",
message: "No route was found matching the URL and request method"
}
]

Here is my function using which I am trying to achieve :

function get_post_details ($params)
{
    $id = $_GET['id'];
    $meta_value = $_GET['meta_value'];  

    if(update_post_meta( $id, '_yoast_wpseo_redirect', $meta_value ))
    {
        $post['status'] = 'Successfully Updated';
        $post['flag'] = '1';
    }
    else
    {
        $post['status'] = 'Error';
        $post['flag'] = '0';    
    }

    if( empty( $post ) ){
        return null;
    }

    return $post;
}

 // Register the rest route here.

add_action( 'rest_api_init', function () {
    register_rest_route( 'post_info', 'post',array(

            'methods'  => 'GET',
            'callback' => 'get_post_details'

        ));

});

Any help would be appreciated. Thank You !

Answer 1

I can't really recreate the error. Are you sure the script is properly loaded?

function get_post_details ($params)
{
    return rest_ensure_response( 'Hello World, this is the WordPress REST API' );
}

// Register the rest route here.
add_action( 'rest_api_init', function () {
    register_rest_route( 'post_info', 'post',array(
            'methods'  => 'GET',
            'callback' => 'get_post_details'
        ));
});

This gave me the expected response - so the route was correctly registered at

http://www.example.com/wp-json/post_info/post

As for the arguments, as suggested in the REST API docs, you should use $params instead of $_GET. Changing this and adding $post = array(); (so the variable is properly declared), made your code work on my local machine. You should probably check first, if these values are even set, also

function get_post_details ($params)
{
    $id = $params['id'];
    $meta_value = $params['meta_value'];

    $post = array();

    if(update_post_meta( $id, '_yoast_wpseo_redirect', $meta_value ))
    {
        $post['status'] = 'Successfully Updated';
        $post['flag'] = '1';
    }
    else
    {
        $post['status'] = 'Error';
        $post['flag'] = '0';
    }

    if( empty( $post ) ){
        return null;
    }

    return $post;
}

// Register the rest route here.
add_action( 'rest_api_init', function () {
    register_rest_route( 'post_info', 'post',array(
            'methods'  => 'GET',
            'callback' => 'get_post_details'
        ));
});

and the route

http://www.example.com/wp-json/post_info/post?id=21&meta_value=https://www.google.com

If you don't have pretty permalinks enabled, the route may look different!