pallet_uniques/
migration.rs

1// This file is part of Substrate.
2
3// Copyright (C) Parity Technologies (UK) Ltd.
4// SPDX-License-Identifier: Apache-2.0
5
6// Licensed under the Apache License, Version 2.0 (the "License");
7// you may not use this file except in compliance with the License.
8// You may obtain a copy of the License at
9//
10// 	http://www.apache.org/licenses/LICENSE-2.0
11//
12// Unless required by applicable law or agreed to in writing, software
13// distributed under the License is distributed on an "AS IS" BASIS,
14// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15// See the License for the specific language governing permissions and
16// limitations under the License.
17
18//! Various pieces of common functionality.
19use super::*;
20use core::marker::PhantomData;
21use frame_support::traits::{Get, UncheckedOnRuntimeUpgrade};
22
23mod v1 {
24	use super::*;
25
26	/// Actual implementation of the storage migration.
27	pub struct UncheckedMigrateToV1Impl<T, I>(PhantomData<(T, I)>);
28
29	impl<T: Config<I>, I: 'static> UncheckedOnRuntimeUpgrade for UncheckedMigrateToV1Impl<T, I> {
30		fn on_runtime_upgrade() -> frame_support::weights::Weight {
31			let mut count = 0;
32			for (collection, detail) in Collection::<T, I>::iter() {
33				CollectionAccount::<T, I>::insert(&detail.owner, &collection, ());
34				count += 1;
35			}
36
37			log::info!(
38				target: LOG_TARGET,
39				"Storage migration v1 for uniques finished.",
40			);
41
42			// calculate and return migration weights
43			T::DbWeight::get().reads_writes(count as u64 + 1, count as u64 + 1)
44		}
45	}
46}
47
48/// Migrate the pallet storage from `0` to `1`.
49pub type MigrateV0ToV1<T, I> = frame_support::migrations::VersionedMigration<
50	0,
51	1,
52	v1::UncheckedMigrateToV1Impl<T, I>,
53	Pallet<T, I>,
54	<T as frame_system::Config>::DbWeight,
55>;
pallet_uniques/migration.rs

pallet_uniques/
migration.rs
