tag friend on a Post - tags

Question

Hello I'm trying to taga friend in a wall post with officials graph api.
As reported on documentation
message_tags
Objects tagged in the message (Users, Pages, etc) (Requires access_token)
object containing fields whose names are the indexes to where objects are mentioned in the message field; each field in turn is an
array containing an object with id, name, offset, and length fields,
where length is the length, within the message field, of the object
mentioned
var array = {'data':{'id':XXXXXXXXXX, 'name':'Friend name','offset':0,'length':11}};
Facebook.code.WallPost({
"access_token" : Titanium.App.Properties.getString('access_token'),
"message" : $("#post_message").val(),
"message_tags" : array
});
Facebook.code.WallPost is a custom javascript function to post.
WallPost : function(data) {
$.ajax({
type : "POST",
dataType : "json",
url : "https://graph.facebook.com/me/feed",
data : data,
success : function(data) {
alert("posted");
},
error : function(data) {
alert("not posted");
}
});
}
With my code post has been published but without tag!
Someone can help me?
Thank you, Stefano

Answer 1

The story_tags field contains information about the people and pages tagged in the story, and is in exactly the same format as the existing message_tags field on the Post object. For example:
{
. . .
"story": "Dhiren Patel likes Marmot.",
"story_tags": {
"19": [
{
"id": 101961456910,
"name": "Marmot",
"offset": 19,
"length": 6
}
],
"0": [
{
"id": 1207059,
"name": "Dhiren Patel",
"offset": 0,
"length": 12
}
]
},
. . .
}
Each tag within the story_tags field is indexed by its offset to where the object is referenced within the story field.
More info: https://developers.facebook.com/blog/post/592/

Answer 2

its a readonly object. Try :
FB.api('/me/posts', { limit: 3 }, function(response) {
for (var i=0, l=response.length; i<l; i++) {
var post = response[i];
if (post.message) {
alert('Message: ' + post.message);
} else if (post.attachment && post.attachment.name) {
alert('Attachment: ' + post.attachment.name);
}
}
});
And set a breakpoint and read the response object, it contains the message_tags.
/J