在哪里设置配置选项？ boot（）或register（）？ singleton（）或bind（）

Question

Suppose I have a price_list option that I set in to null in the app.php file:

'price_list' => null,

price_list should be set based on some conditions when my app is run. for example if logged in user has administrator role then I should fetch appropriate value from a price_list table:

if (Some Condition){
     $pricelist  = fetch from price_list table
     Config::set('price_list' ,$price_list);
}

So here, I found that to do that I should use a service provider and then do all those functionalities as mentioned in this Answer. But I do not know which approach is right to use boot or register method and singleton or bind method?

Answer 1

As mentioned in the documentation, you should never attempt to register any event listeners, routes, or any other piece of functionality within the register method.
Otherwise, the boot fits exactly your needs, which is called after all other service providers have been registered.
so you can do something like:

if (\Auth::user()->isAdmin()) { //you can make the function in the model, here just an example
    config()->set('price_list', 'blablabla);
}