How to execute a query on tin-can statements? - tin-can-api

Question

I am using Learning Locker (Learning Record Store).
I succeed inserting statements to it via the REST API.
But I did not succeed fetching statements from it.
How do I preform a query on statements? REST API?

Answer 1

I used tinCanPhp library. This is how you establish a connection with the Learning Locker database and query it in PHP. For example:
$lrs = new TinCan\RemoteLRS(
'endpoint/public/data/xAPI/',
'1.0.1',
'username',
'key'
);
$actor = new TinCan\Agent(
[ 'mbox' => 'mailto:dikla#gmail.com' ]
);
$verb = new TinCan\Verb(
[ 'id' => 'http://adlnet.gov/expapi/verbs/progressed' ]
);
$activity = new TinCan\Activity(
[ 'id' => 'http://game.t-shirt' ]
);
$statement = new TinCan\Statement(
[
'actor' => $actor,
'verb' => $verb,
'object' => $activity,
]
);
//get All Actor activity by his unique id
function getAllActorActivity($actorUri){
global $lrs;
$actor = new TinCan\Agent(
[ 'mbox' => $actorUri ]//actorUri should look like this 'mailto:dikla#gmail.com'
);
$answer=$lrs->queryStatements(['agent' => $actor]);
return $answer;
}

Answer 2

If it's via javascript you can use the ADL xAPI Wrapper. It simplifies communication with an LRS... https://github.com/adlnet/xAPIWrapper#get-statements
In general you do a GET request on endpoint /statements... try just that first and see if you get a json response with a "statements" and a "more" property. Then if that works, you can narrow down results with filters. See the spec for the details and options. https://github.com/adlnet/xAPI-Spec/blob/master/xAPI.md#stmtapiget
try that curl command.. it should return a statement result albeit from the ADL LRS...
curl --user tom:1234 GET https://lrs.adlnet.gov/xapi/statements