# What does that mean? **URL:** \ **Category:** Meeting Minutes\ **Created:** [May 1, 2021, 4:50am UTC](https://discuss.jsonapi.org/t/what-does-that-mean/2211 "2021-05-01T04:50:28Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![elbi](https://avatars.discourse-cdn.com/v4/letter/e/5fc32e/32.png) [@elbi](https://discuss.jsonapi.org/u/elbi)\ **Post date:** [May 1, 2021, 4:50am UTC](https://discuss.jsonapi.org/t/what-does-that-mean/2211/1 "2021-05-01T04:50:28Z")
[https://jsonapi.org/format/#fetching-relationships](https://jsonapi.org/format/#fetching-relationships) ![image](https://us1.discourse-cdn.com/flex016/uploads/jsonapi/original/1X/7aa72fff534c5e0597c814392333c4068a604f56.png) I still don’t understand. based on the image, if I REQUEST to url ‘/articles/1/relationships/author’ 2 times, then it will return null as the main data? ---
**Author:** ![jelhan](https://sea2.discourse-cdn.com/flex016/user_avatar/discuss.jsonapi.org/jelhan/32/822_2.png) [@jelhan](https://discuss.jsonapi.org/u/jelhan)\ **Post date:** [May 7, 2021, 10:23pm UTC](https://discuss.jsonapi.org/t/what-does-that-mean/2211/2 "2021-05-07T22:23:56Z")
It will either return `{ "data": null }` if the post does not have an author or the resource object representing the author of the post. For the first example that would be the `people` record with ID `"12"`. Assuming that data does not change, it doesn’t make a difference how often you execute the request. A `GET` request should read current data only. It should not have any side effects. ---
**Author:** ![elbi](https://avatars.discourse-cdn.com/v4/letter/e/5fc32e/32.png) [@elbi](https://discuss.jsonapi.org/u/elbi)\ **Post date:** [November 3, 2021, 4:28am UTC](https://discuss.jsonapi.org/t/what-does-that-mean/2211/3 "2021-11-03T04:28:03Z")
thanks bro for you answer