Update existing issue field data in JIRA using rest api

[Hari Prasath P]

I have created a rest api to access an issue in JIRA. If I edit value of a field and save it using a button click, how to update the new value in that corresponding issue replacing the old value?

I have viewed the following links regarding editing and updating issues, but do not have idea how to access them.

1) Editing issue
2) Updating issue

Have added a sample code using PUT in request as follows,

AP.require(['request'], function(request) {
 request({
 url: 'https://mysite.atlassian.net/rest/api/2/issue/XYZ-5',
 type: 'PUT',
 data: {
 "fields": {"assignee":{"name":"harry"}}
 },
 success: function(response) {
 alert("success");
 document.location.reload();
 },
 error: function (response) {
 alert('fail... ');
 }
 });
 });

But I get an error 403 - as no permission to access.

Can anyone help me with a basic example for updating values in an issue?

[Nic Brough -Adaptavist-]

It looks to me like your code is not logging you in.  Without a login, you don't have permission to updates the issue.

[Hari Prasath P]

I am using the same procedure to get the issue details using request and also able to access fields using the below code,

AP.require(['request'], function(request) {
 request({
 url: 'https://mysite.atlassian.net/rest/api/2/issue/XYZ-5',
 type: 'GET',
 success: function(response) {
 alert("success");
},
 error: function (response) {
 alert('fail... ');
 }
 });
});

[Nic Brough -Adaptavist-]

Again, your code does not appear to log in, so it has no permission to do things.

[Hari Prasath P]

Using the above code GET method worked for me, only POST didn't work. So, can you please help me working with Edit Issues using POST method with a basic example.