Facebook Mutual Friends API - facebook

Question

Using the Facebook Graph API (v2.4), I can't seem to access any information about mutual friends, not even the total count.
Here's my graph query (User ID changed for privacy purposes):
https://graph.facebook.com/v2.4/123456789?fields=context.fields(mutual_friends)
The result I get is:
{
"context": {
"id": "dXNlcl9jb250ZAXh0OgGQBqWf9ZAHMZA1yjZBJZABsMDkDORNsle8wkS8Acci9r4FsOdyRVl1TSGSXAsofmlaWYS05piSZCV9F1QwNNs0L9XpNuGLAaLyMk8Fnaiwyxpm5shUZD"
},
"id": "123456789"
}
I tried using FB's iOS SDK to make the same query as well, but got the same result.
Any suggestions?

Answer 1

The all_mutual_friends, mutual_friends, and three_degree_mutual_friends context edges of the Social Context API were deprecated on April 4, 2018 and immediately started returning empty data sets. They have now been fully removed.

Answer 2

The {user_id} must be another user of your app, and the user access token you MUST use is from another user of your app.
Then
GET /{user_id}?fields=context{mutual_friends}&access_token={other_users_access_token}
should work and give results, if both users gave your app the user_friends permission.
See
https://developers.facebook.com/docs/graph-api/reference/user-context#Reading
https://developers.facebook.com/docs/graph-api/reference/user-context/mutual_friends/

Answer 3

function aa_mutl_frnd(x, row)
{
FB.init({
appId : '<?php echo get_option('_fb_apps_id');?>', //Facebook apps id using theme option
cookie : true, // enable cookies to allow the server to access
// the session
xfbml : true, // parse social plugins on this page
version : 'v2.5' // use graph api version 2.5
});
FB.getLoginStatus(function(response) {
if (response.status === 'connected') {
var accessToken = response.authResponse.accessToken;
console.log(':acc_tk:'+accessToken);
//////////////////////////////////////////////////////////
var data={
'action': 'wq_accss_tkn_gnrt',
'ddt' : accessToken
}
$.post('<?php echo admin_url('admin-ajax.php'); ?>', data, function (response) {
console.log(':acc_tk2:'+response);
FB.api(
"/"+x+"",
{
"fields": "context.fields(all_mutual_friends)",
//"access_token": '',
"appsecret_proof": response,
},
function (response) {
console.log(response);
}
);
});
////////////////////////////////////
}
});
}
/// ajax part /////
add_action('wp_ajax_wq_accss_tkn_gnrt', 'wq_accss_tkn_gnrt');
add_action('wp_ajax_nopriv_wq_accss_tkn_gnrt', 'wq_accss_tkn_gnrt');
function wq_accss_tkn_gnrt() {
echo hash_hmac('sha256',$_POST['ddt'],'app_secret');;
die();
}