Update Task using Graph API - Postman : IF-Match header must be specified issue

Question

HI

I am trying to update a task using postman. I have used this body from Microsoft documentation.

PATCH https://graph.microsoft.com/v1.0/planner/tasks/{task-id}  
Content-type: application/json  
Prefer: return=representation  
If-Match: W/"JzEtVGFzayAgQEBAQEBAQEBAQEBAQEBAWCc="  
  
{  
  "assignments": {  
    "fbab97d0-4932-4511-b675-204639209557": {  
      "@odata.type": "#microsoft.graph.plannerAssignment",  
      "orderHint": "N9917 U2883!"  
    }  
  },  
  "appliedCategories": {  
    "category3": true,  
    "category4": false  
  }  
}  

When i sent it in postman, it showed this below error

{  
    "error": {  
        "code": "",  
        "message": "The If-Match header must be specified for this kind of request.",  
        "innerError": {  
            "date": "2022-09-06T05:32:39",  
            "request-id": "7b55c7bc-d09a-498c-b8be-66338427cfa3",  
            "client-request-id": "7b55c7bc-d09a-498c-b8be-66338427cfa3"  
        }  
    }  
}  

I have entered the If-Match header in the Headers section of Postman and also in the body. (Refer the below image)

I don't know where else to update the If-Match header content

Answer 1

Hi @Anonymous ,

It appears you are using etag in wrong format, If-Match: W/"JzEtVGFzayAgQEBAQEBAQEBAQEBAQEBAWCc=" ideally you should be using in this format If-Match: "JzEtVGFzayAgQEBAQEBAQEBAQEBAQEBAWCc=".

You can also refer to a similar post >> Graph - The If-Match header must be specified for this kind of request

Hope this helps.
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