mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-17 12:25:42 +00:00
Bastian Köcher
74428fa8ac
* generate_storage_alias: Rewrite as proc macro attribute
This rewrites the `generate_storage_alias!` declarative macro as proc-macro attribute. While doing
this the name is changed to `storage_alias`. The prefix can now also be the name of a pallet. This
makes storage aliases work in migrations for all kind of chains and not just for the ones that use
predefined prefixes.
* Fix compilation and FMT
* Moare fixes
* 🤦
* ......
* Rework the syntax and support instancing
* FMT
* Prefix variants with `Storage`
* Make it compile
* Fix where clause on rust stable
51 lines
1.6 KiB
Rust
51 lines
1.6 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2021-2022 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! The migrations of this pallet.
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use frame_support::traits::OnRuntimeUpgrade;
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/// A struct that does not migration, but only checks that the counter prefix exists and is correct.
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pub struct CheckCounterPrefix<T: crate::Config>(sp_std::marker::PhantomData<T>);
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impl<T: crate::Config> OnRuntimeUpgrade for CheckCounterPrefix<T> {
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fn on_runtime_upgrade() -> frame_support::weights::Weight {
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0
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}
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#[cfg(feature = "try-runtime")]
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fn pre_upgrade() -> Result<(), &'static str> {
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use frame_support::ensure;
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// The old explicit storage item.
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#[frame_support::storage_alias]
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type CounterForListNodes<T: crate::Config> = StorageValue<crate::Pallet<T>, u32>;
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// ensure that a value exists in the counter struct.
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ensure!(
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crate::ListNodes::<T>::count() == CounterForListNodes::<T>::get().unwrap(),
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"wrong list node counter"
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);
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crate::log!(
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info,
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"checked bags-list prefix to be correct and have {} nodes",
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crate::ListNodes::<T>::count()
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);
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Ok(())
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}
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}
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