Pull Request

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• Link this pull request to an issue.

Issue

Closes: #9431

Approach

I added a beforeLiveQueryEvent trigger which allows the user to modify the updated object before it is passed to the LiveQuery server (via PubSub). It is a cloned version of the object so it won't modify the one passed to the afterSave trigger.

I've added an option which I'm not really convinced. You can set the context of the request to req.context.preventLiveQuery === true to prevent the publish to be made by the Parse Server and so limiting some network and CPU consumption depending on some business logic.

Tasks

• Add tests
• Add changes to documentation (guides, repository pages, code comments)
• Add security check
• Add new Parse Error codes to Parse JS SDK