Expose mongoose.Query._pre as public

[stalniy]

Do you want to request a feature or report a bug?

feature

What is the current behavior

mongoose.Query._pre undocumented and private

What is the expected behavior?

mongoose.Query._pre documented and public

Why?

I’m an author of casl (permission management system) and I wrote a plugin for mongoose which adds accessibleBy static method to model. This method returns accessible records from db based on user permissions.

There are cases when I can predict that there is no such records in db and instead of sending dummy query that returns no results, I’d like to throw an error that user doesn’t have permissions.

I can use pre exec hook on query to achieve this but currently it’s private and I don’t want to use private method which eventually may disappear without any notice in release

[stalniy]

looks like I can just patch Query.exec method. As far as I see it's used as a gate for all db queries, right?

[vkarpov15]

This is something we've been wanting to do for a while. We will look into this for our next minor release.