Add more relation events

[mjauvin]

Fixes: octobercms/october#4561

[Rike-cz]

One thing to attach/detach event. I thought that it was written previously like you can halt whole procedure through false value returned on before*** event. It's not possible now?

And do you plan to implement HasOneOrMany, AttachOneOrMany, MorphOneOrMany?

[mjauvin]

One thing to attach/detach event. I thought that it was written previously like you can halt whole procedure through false value returned on before*** event. It's not possible now?

@LukeTowers requested this to be changed. The way to halt these is to throw an exception now.

And do you plan to implement HasOneOrMany, AttachOneOrMany, MorphOneOrMany?

For which events? I thought you said you were now thinking this was not required, did I read that wrong?

ref.

And here is the question. To have inversional events for these relationships or to call inversional counterparts above when needed? When needed means add/remove methods where relationship arises.
If is it good idea to have them here too (I don't think so now)...

[Rike-cz]

@mjauvin I was thinking, but last word has @LukeTowers. Can you tell us, what do you think about HasOneOrMany, AttachOneOrMany, MorphOneOrMany events, @LukeTowers? Useless?

Edit: I thought about two approaches to HasOneOrMany etc. and definitelly yes, add/remove-events is good and more clean idea.

[mjauvin]

This is ready guys.

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[mjauvin]

Can this be added to Milestone 1.1.2?

[LukeTowers]

Will add it to 1.1.3 instead

[daftspunk]

Still some work needed on this, in particular, adherence to the developer guide and before events should halt to meet continuity with the rest of the platform

Overall looks good though, will be available in next release. Thanks @mjauvin 🙏