Query for all tasks in specific workspace that are not completed - asana

Question

I have the following cURL cmd running which returns all tasks for a specific userID within a specific workspaceID, but the "completed=false" part of the cmd doesn't influence the data returned. I am trying to exclude all "completed" tasks. Everything else is working as I expected. Below is the current cmd string and a snippet of the data returned back. As you can see one of the returned tasks indicates "completed" is true while the other indicates false.
Anyone see what I may be missing? Thanks in advance for your help.
cURL cmd:
curl -u <api-key>: "https://app.asana.com/api/1.0/tasks?workspace=<workspace>&assignee=<teamMemberId>&completed=false&opt_fields=name,assignee,assignee_status,notes,created_at,modified_at,completed_at,due_on,completed&opt_pretty"
output (partial)
{
"data": [
{
"id": <ID>,
"created_at": "2014-03-11T03:34:52.002Z",
"modified_at": "2014-03-11T23:33:07.544Z",
"name": "<nameoftask>",
"notes": "",
"assignee": {
"id": <ID>
},
"completed": true,
"assignee_status": "upcoming",
"completed_at": "2014-03-11T23:33:06.729Z",
"due_on": "2014-03-11"
},
{
"id": <ID>,
"created_at": "2014-03-11T23:33:07.196Z",
"modified_at": "2014-03-11T23:33:07.196Z",
"name": "<nameoftask>",
"notes": "",
"assignee": {
"id": ID>
},
"completed": false,
"assignee_status": "upcoming",
"completed_at": null,
"due_on": "2014-03-14"
},

Answer 1

TL;DR: You want completed_since=now, not completed=false.
The GET /tasks endpoint doesn't take a parameter completed - it does however take completed_since, which can take a timestamp (as provided by JS's .toISOString()) or the string "now". It always includes incomplete tasks. This is documented in the API Docs on Tasks (specifically the section on "Querying for tasks").
We're looking to improve the way you can filter tasks, but for right now what's documented there is all there is.