Mutation: Partial updates - send only changed fields

[klausXR]

I'm working on an application that allows two given users to edit the same entity simultaneously and I'm trying to avoid an issue where one overwrites the data of the other.

Scenario:

There is a post edit form on /post/25/edit
The page contains 3 inputs and a save button - Title, Description, Tags

Two users enter the page simultaneously, one updates the title and the other one updates the description.

Case 1: I'm doing partial updates and sending only the updated data to postUpdate mutation. I'm also returning the updated post as a payload and sync the UI after the mutation completes. There is no conflicts, because they didn't update the same field.

Case 2: I'm not doing partial updates and I'm sending the entire post object to the postUpdate mutation. I now have a race condition and a data conflict, since both mutations change all fields. Whats even worse, the mutation succeeds, returning the updated post. I take its data and merge it with the state so that the form updates. One of the users has now lost his changes.

The application that I'm working on is not currently using VueApollo, but I will propose its adoption to my team soon, and if it has a solution for this issue, it would help me out tremendously.

I am sorry if this has already been addressed, if that is the case, would you kindly point me in the right direction?