Using the addProject API for “Add a project to a task”, is it possible to add the task to multiple projects?
I see the body parameter expects the dat to include the project ID. But, can I simply add multiple project IDs (comma separated) to add the task to multiple projects?
No, sorry, only one project per call here.
Do you happen to know of a simple way to add a task to multiple projects (other than duplicating the call X amount of times)? I’m using Zapier, and was hoping to do some basic code to handle this.
Is it for existing tasks, or for new tasks?
You can create new tasks to multiple projects in 1 call, like this:
POST https://app.asana.com/api/1.1/tasks
{“data”:{“name”:“my task”,“projects”:[“1132891571239348”,“1132891571239350”]}}
If you want to add a maximum of 10 projects to an existing task, you can do it using one single call to the “batch” endpoint.
This would be for existing tasks. Based on a particular dropdown custom field value, I plan to assign the task to a certain set of projects.
E.g.,
Regardless of the conditional aspect, do you have any code samples of using the POST /batch endpoint to set multiple projects to a given task ID?
Hey ! In fact I have an application in vuejs. I use axios for ajax. However, when I make a get to the ASana api, here is the error that the server returns:
Access to XMLHttpRequest at ‘https://app.asana.com/api/1.0/projects’ from origin ‘http://localhost:8000’ has been blocked by CORS policy: Request header field x-csrf-token is not allowed by Access-Control-Allow-Headers in preflight response.
Hi, I have not tested it, but it should look like this, to add task “123” to projects “111” and “222”.
POST /batch
payload:
{
"data": {
"actions": [{
"method": "POST",
"relative_path": "/tasks/123/addProject",
"data": {"project": "111"}
}, {
"method": "POST",
"relative_path": "/tasks/123/addProject",
"data": {"project": "222"}
}
]
}
}
You can add up to 10 action in one single batch. So you can add your task to 10 projects at a time.
Just to make sure it’s clear for @FreshyJon - you’re still doing a separate API method to add to each project, there’s no way around that; but using the batch approach, you only have to go over the wire once (or more accurately, once for every 10 API methods) instead of N times where N is the number of API methods you need to do.
Yeah, this is the code I tried using, via @Frederic_Malenfant’s post example, but Zapier is returning a message of Bad Request
You’re missing the outer “data” element.
Excellent. That made it work. 
