Cannot create batch work items using batch operations in TFS - tfs

Question

I am getting below errors while trying to create workitems with batch creation method
Error 1
"Message":"No MediaTypeFormatter is available to read an object of type 'JsonBatchHttpRequest' from content with media type 'application/json-patch+json'."
Error 2
{"count":1,"value":{"Message":"One or more errors occurred."}}
I have referred to this documentation https://www.visualstudio.com/en-us/docs/integrate/api/wit/batch from Microsoft . and my question on stackoverflaw Create Large Amount of Work Items in TFS Using Javascript REST API
I have tried to send data as below methods
"json: x"
"body: x:"
"body:JSON.stringify(x)"
"json:[body:x]"
I have tried both "application/json-patch+json" and "application/json"(recommended as MIcrosoft documentation) as Content-Types
I have tired both Post (recommended as MIcrosoft documentation) and Patch methods
There is no references available for this error hence I have sucked at this point.What could be possibly wrong here please help..
public batchOperation( ):q.Promise<boolean>{
let deferred = q.defer<boolean>();
try {
var batchCreateUrl = this.collectionURL+"/_apis/wit/$batch?api-version=1.0";
var x= {
method:"PATCH",
uri:"/VSTS_TFS_Test/_apis/wit/workItems/$Bug?api-version=1.0",
headers:{
"Content-Type":"application/json-patch+json"
},
body:[
{ "op":"add",
"path": "/fields/System.Tags",
"value":"tg;tg1;tg2"
},
{
"op": "add",
"path": "/fields/System.Title",
"value": "Some Title Text "
},
{
"op": "add",
"path": "/fields/System.Description",
"value":"this is description"
}
]
}
var options = {
url: batchCreateUrl,
username: this.username,
password: this.password,
domain: this.domain,
method: 'PATCH',
headers: {
'Content-Type': 'application/json-patch+json'
},
body: x
};
httpntlm.patch(options, function(err,res) {
if(err) {
return deferred.reject(false);}
else{
console.log("Patch Complete");
console.log(res.body);
deferred.resolve(true);
}
});
} catch (error) {
console.log("Failed to Perform Batch Operation ")
deferred.reject(false);
}
return deferred.promise;
}

Answer 1

You need to use "application/json" as Content-Types and the post method just like the tutorial of Microsoft documentation described.
Since you are using httpntlm, you can include the following options:
json: if you want to send json directly (content-type is set to
application/json)
files: an object of files to upload (content-type is set to
multipart/form-data; boundary=xxx)
body: custom body content you want to send. If used, previous
options will be ignored and your custom body will be sent.
(content-type will not be set)
Source Link
If you are using body, your previous options will be ignored(content-type will lose), this may cause the issue. Give a try with directly using json.