According to the Asana API documentation it should be possible to remove a parent from a subtask, so the subtask becomes a normal task:
Creating a subtask is the same as a creating an normal task, but instead of specifying a workspace you must specify a parent task. Each task can only have a single parent and you can use the setParent endpoint to add or remove a parent from an existing task.
However it's not clear to me how i can remove a parent with this endpoint. I've tried the following things as the body of the request
parent=0
=> 400 bad request {"errors":[{"message":"parent: Not an ID: 0"}]}
null
=> 400 bad request {"errors":[{"message":"Could not parse request data, invalid JSON"}]}
parent={subtaskid}
=> 500 error (makes sense that you can't add a subtask as parent of itself, but shouldn't be a 500 error I think) {"errors":[{"message":"Server Error","phrase":"14 orange apes run smoothly"}]}
parent=
=> 400 bad request {"errors":[{"message":"parent: Not an ID: "}]}
Is this at all possible, and if so, how?
(I work at Asana.) Have you tried parent=null?