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use associated iterator types for InspectEnumerable (#12389)

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* use associated iterator types for InspectEnumerable

* Update frame/uniques/src/impl_nonfungibles.rs

Co-authored-by: parity-processbot <>
Co-authored-by: Bastian Köcher <git@kchr.de>
This commit is contained in:
benluelo
2022-11-02 19:31:04 -04:00
committed by GitHub
parent 84167bd7d4
commit 34915840f3
3 changed files with 42 additions and 16 deletions
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substrate/frame/uniques/src/impl_nonfungibles.rs
+15 -8
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@@ -19,6 +19,7 @@
use super::*;
use frame_support::{
storage::KeyPrefixIterator,
traits::{tokens::nonfungibles::*, Get},
BoundedSlice,
};
@@ -155,25 +156,31 @@ impl<T: Config<I>, I: 'static> Transfer<T::AccountId> for Pallet<T, I> {
}
impl<T: Config<I>, I: 'static> InspectEnumerable<T::AccountId> for Pallet<T, I> {
type CollectionsIterator = KeyPrefixIterator<<T as Config<I>>::CollectionId>;
type ItemsIterator = KeyPrefixIterator<<T as Config<I>>::ItemId>;
type OwnedIterator =
KeyPrefixIterator<(<T as Config<I>>::CollectionId, <T as Config<I>>::ItemId)>;
type OwnedInCollectionIterator = KeyPrefixIterator<<T as Config<I>>::ItemId>;
/// Returns an iterator of the collections in existence.
///
/// NOTE: iterating this list invokes a storage read per item.
fn collections() -> Box<dyn Iterator<Item = Self::CollectionId>> {
Box::new(CollectionMetadataOf::<T, I>::iter_keys())
fn collections() -> Self::CollectionsIterator {
CollectionMetadataOf::<T, I>::iter_keys()
}
/// Returns an iterator of the items of a `collection` in existence.
///
/// NOTE: iterating this list invokes a storage read per item.
fn items(collection: &Self::CollectionId) -> Box<dyn Iterator<Item = Self::ItemId>> {
Box::new(ItemMetadataOf::<T, I>::iter_key_prefix(collection))
fn items(collection: &Self::CollectionId) -> Self::ItemsIterator {
ItemMetadataOf::<T, I>::iter_key_prefix(collection)
}
/// Returns an iterator of the items of all collections owned by `who`.
///
/// NOTE: iterating this list invokes a storage read per item.
fn owned(who: &T::AccountId) -> Box<dyn Iterator<Item = (Self::CollectionId, Self::ItemId)>> {
Box::new(Account::<T, I>::iter_key_prefix((who,)))
fn owned(who: &T::AccountId) -> Self::OwnedIterator {
Account::<T, I>::iter_key_prefix((who,))
}
/// Returns an iterator of the items of `collection` owned by `who`.
@@ -182,7 +189,7 @@ impl<T: Config<I>, I: 'static> InspectEnumerable<T::AccountId> for Pallet<T, I>
fn owned_in_collection(
collection: &Self::CollectionId,
who: &T::AccountId,
) -> Box<dyn Iterator<Item = Self::ItemId>> {
Box::new(Account::<T, I>::iter_key_prefix((who, collection)))
) -> Self::OwnedInCollectionIterator {
Account::<T, I>::iter_key_prefix((who, collection))
}
}