Fix: When using SelectPlus with a relationship in index, it creates a N+1 problem.

[HenriqueSPin]

This pull request prevents redundant database queries when displaying SelectPlus in index fields. Currently, an extra query is executed per line due to repeated loading of relationships, even when eager loading is utilized with $with. This update ensures that relationships are only loaded if they have not been previously loaded, optimizing performance.

[HenriqueSPin]

Hello, @ralphschindler ! Can you please take a look at this? Many thanks for considering my request.

[ralphschindler]

Hi! I was looking at this last week, is there a reason you closed?

[HenriqueSPin]

I thought that it was going nowhere. I can reopen it if it will be considered. Should I?

[HenriqueSPin]

@ralphschindler Here it is.
I will open another PR with a fix that properly emits the attribute-x-change event on the event bus, so we can have fields depending on this field.

[HenriqueSPin]

@ralphschindler Is there something missing? Do you need more context?

[gustavocaiano]

@ralphschindler please take a look, also waiting on this.

[ralphschindler]

Hi @HenriqueSPin,

I opened the demo app included, and attempted to replicated the problem (I also added laravel-debugbar to view queries. How can I see the problem you're reporting? What steps do I take? I assume I should be looking at the statesVisited relation on the Person model?