Added a select modifier closure parameter

[pine3ree]

Allows to send more complex queries (for example aggregate fields on joined tables) to the paginator using a simple closure without resorting to DbSelect (parent class) adapter.

[samsonasik]

it will conflict with it #4427 that already merged into develop

[pine3ree]

What about adding a \Closure private property $selectModifier to the adapter and a setter method setSelectModifier(\Closure $selectModifier) to achieve the same result without conflicting with #4427 ?

UPDATE
or even simpler a method modifySelect(\Closure $selectModifier)) which alter the $select property direclty using a closure

[samsonasik]

ping @ralphschindler

[ralphschindler]

I'm having trouble fully understanding your use case, can you elaborate on what kind of things your closure would be doing?

[pine3ree]

@ralphschindler
Never mind, I just needed a way to be able to modify the paginator select. But it turned out that using the DbSelect adapter was a better solution.

i'm closing discussion now.