Automatically generating storage setter

Question

When declaring storage items inside the runtime, we can automatically generate getters to query that storage item, for example (https://docs.substrate.io/v3/runtime/storage/#declaring-`storage-items`)`:

#[pallet::storage]
#[pallet::getter(fn some_primitive_value)]
pub(super) type SomePrimitiveValue<T> = StorageValue<_, u32, ValueQuery>;

Is there a simple way to generate a setter in the same way? While a simple setter is likely undesirable on all storage items, it would be handy to have a shorthand way to set storage values from root or signed accounts:

#[pallet::root_setter(fn some_primitive_value)]
#[pallet::signed_setter(fn some_primitive_value)]

Answer 1

There is not a way with our macros, and generally I would suggest not even to use this feature.

When you include #[pallet::getter(fn some_primitive_value)] all that is happening is the generation of the following function:

fn some_primitive_value() -> u32 {
    SomePrimitiveValue::<T>::get()
}

So really you have not saved much code writing, and you have created some macro magic abstraction.

Similarly, if you wanted to write a "setter", you can just write:

fn set_some_primitive_value(value: u32) {
    SomePrimitiveValue::<T>::put(value)
}