Moves single block migrations from frame_executive to frame_system config #844
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ggwpez
reviewed
Aug 7, 2025
Yes, it requires a fix on the polkadot-sdk side, will open a PR there later today or tomorrow: 
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Should be fixed once we merge paritytech/polkadot-sdk#9451 and the changes are backported. Will change the PR status to DRAFT for now. |
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…e_upgrade (#9451) Recently, when moving the single block migrations from `frame_executive::Executive` to `SingleBlockMigrations` in `frame_system::Config`, I noticed that `try_runtime_upgrade` was ignoring the `SingleBlockMigrations` defined in frame_system. More context at polkadot-fellows/runtimes#844 Based on PR #1781 and [PRDoc](https://github.com/paritytech/polkadot-sdk/blob/beb9030b249cc078b3955232074a8495e7e0302a/prdoc/1.9.0/pr_1781.prdoc#L29), the new way for providing the single block migrations should be through `SingleBlockMigrations` in `frame_system::Config`. Providing them from `frame_executive::Executive` is still supported, but from what I understood is or will be deprecated. > `SingleBlockMigrations` this is the new way of configuring migrations that run in a single block. Previously they were defined as last generic argument of Executive. This shift is brings all central configuration about migrations closer into view of the developer (migrations that are configured in Executive will still work for now but is deprecated). ## Follow-up Changes Will try to open a pull request tomorrow for deprecating the use of `OnRuntimeUpgrade` in `frame_executive::Executive`.
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…e_upgrade (#9451) Recently, when moving the single block migrations from `frame_executive::Executive` to `SingleBlockMigrations` in `frame_system::Config`, I noticed that `try_runtime_upgrade` was ignoring the `SingleBlockMigrations` defined in frame_system. More context at polkadot-fellows/runtimes#844 Based on PR #1781 and [PRDoc](https://github.com/paritytech/polkadot-sdk/blob/beb9030b249cc078b3955232074a8495e7e0302a/prdoc/1.9.0/pr_1781.prdoc#L29), the new way for providing the single block migrations should be through `SingleBlockMigrations` in `frame_system::Config`. Providing them from `frame_executive::Executive` is still supported, but from what I understood is or will be deprecated. > `SingleBlockMigrations` this is the new way of configuring migrations that run in a single block. Previously they were defined as last generic argument of Executive. This shift is brings all central configuration about migrations closer into view of the developer (migrations that are configured in Executive will still work for now but is deprecated). ## Follow-up Changes Will try to open a pull request tomorrow for deprecating the use of `OnRuntimeUpgrade` in `frame_executive::Executive`. (cherry picked from commit 7753112)
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…e_upgrade (#9451) Recently, when moving the single block migrations from `frame_executive::Executive` to `SingleBlockMigrations` in `frame_system::Config`, I noticed that `try_runtime_upgrade` was ignoring the `SingleBlockMigrations` defined in frame_system. More context at polkadot-fellows/runtimes#844 Based on PR #1781 and [PRDoc](https://github.com/paritytech/polkadot-sdk/blob/beb9030b249cc078b3955232074a8495e7e0302a/prdoc/1.9.0/pr_1781.prdoc#L29), the new way for providing the single block migrations should be through `SingleBlockMigrations` in `frame_system::Config`. Providing them from `frame_executive::Executive` is still supported, but from what I understood is or will be deprecated. > `SingleBlockMigrations` this is the new way of configuring migrations that run in a single block. Previously they were defined as last generic argument of Executive. This shift is brings all central configuration about migrations closer into view of the developer (migrations that are configured in Executive will still work for now but is deprecated). ## Follow-up Changes Will try to open a pull request tomorrow for deprecating the use of `OnRuntimeUpgrade` in `frame_executive::Executive`. (cherry picked from commit 7753112)
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#9638) Follow-up of #9451 Based on PR #1781 and [PRDoc](https://github.com/paritytech/polkadot-sdk/blob/beb9030b249cc078b3955232074a8495e7e0302a/prdoc/1.9.0/pr_1781.prdoc#L29), the new way for providing the single block migrations should be through `SingleBlockMigrations` in `frame_system::Config`. Providing them from `frame_executive::Executive` is still supported, but is deprecated. > `SingleBlockMigrations` this is the new way of configuring migrations that run in a single block. Previously they were defined as last generic argument of Executive. This shift is brings all central configuration about migrations closer into view of the developer (migrations that are configured in Executive will still work for now but is deprecated). `Executive` docs will look like: <img width="800" alt="image" src="https://github.com/user-attachments/assets/6f285c26-5c61-4350-a41b-aebc6b856601" /> Companion PR in polkadot-fellows/runtimes#844
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Depends on paritytech/polkadot-sdk#9451
Based on PR paritytech/polkadot-sdk#1781 and PRDoc, the new way for providing the single block migrations should be through
SingleBlockMigrationsinframe_system::Config. Providing them fromframe_executive::Executiveis still supported, but from what I understood is or will be deprecated.Will also open a PR on polkadot-sdk side, adding a deprecation warning.