Parse-server: Make trigger context accessible in all triggers

[AurelienVasseur]

Is your feature request related to a problem? Please describe.
Sometime we need to pass some context to adapt the behavior / action of a trigger.
Currently context is only available on these triggers: beforeSave - afterSave - beforeDelete - afterDelete - beforeFind
See #6459 #6626 #6666

Describe the solution you'd like
It should be possible to pass arguments from all 'actions' (e.g. find, login, liveQuery, etc...) to the triggers.
As I said the logic is already implemented for some of them and the concept seems to have been accepted.
I make sense to be able to use context in all triggers.

query.find( { context: {example: "abc"} } )

// currently we can use context with beforeFind :)
Parse.Cloud.beforeFind("myClass", async (request) => {
    if request.context.example == "abc" {
      // To some particular actions
    }
})

// currently we can't use context with afterFind :(
Parse.Cloud.afterFind("myClass", async (request) => {
    if request.context.example == "abc" {
      // To some particular actions
    }
})

I hope this feature will help a lot of devs ;)

[mtrezza]

Thanks for suggesting.

It surely makes sense to further extend context accessibility. Would you be willing to open a PR? It should be fairly straightforward as the existing context implementation already provides some guidance.

[AurelienVasseur]

Yes I can open a PR to work on it but I'm not an expert parse user so I don't know if I have the capacities to do that.
But I'm totally agree to test and do my first contribution on an amazing open source project ;)

Do you have any documentation for beginner to learn how to work on the project?

[mtrezza]

Sure, the contribution guide explains how to make changes to Parse Server and contribute these changes as pull request.

Feel free to reach out if you need any guidance.

[AurelienVasseur]

@mtrezza I tried to understand what I have to do to implement that and to be honest I'm totally lost. Can someone else work on it because we are going to wait a year if I do? x)

[Moumouls]

@AurelienVasseur i see that you have forker parse-server.

To install the project npm i then you need 2 shells to work on parse server

• First shell: npm run watch since parse server is compiled over babel
• Second shell: npm test spec/TheSpecFileYouWantToWorkOnIt.spec.js

You can also in a spec.js file convert a test from it to fit to tell to the jasmine test framework to focus on a particular test
Then if you run npm test Jasmine will only run the focused test.

I can suggest you to explore RestWrite.js and RestQuery.js files, you will find some trigger code 😉

[AurelienVasseur]

@Moumouls thanks a lot for your help :)
I will try to work on it but I can't guarantee a quick result

[Moumouls]

No problem @AurelienVasseur, just give it a try and advance at your own speed :)

[dblythy]

@AurelienVasseur I have merged a PR for context for afterFind, however I believe context still needs to be added for:

-LiveQuery triggers (context on query.subscribe() could possibly get passed through all LQ events)
-Login triggers (context on Parse.User.logIn())
-File Triggers (context on file.save())

[AurelienVasseur]

@dblythy Thanks a lot 😃 I was a little bit lost

I didn't already find the time to work on it but I will try as fast as possible
I'm also not sure if we can use it with fetch, I will check that when I will work on it