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---
name: New sprint issue
about: ⚠️ Should only be used by the engine team ⚠️
title: ''
labels: 'missing usage in PRD, impacts docs'
assignees: ''
---
Related product team resources: [PRD]() (_internal only_)
Related product discussion:
## Motivation
<!---Copy/paste the information in PRD or briefly detail the product motivation. Ask product team if any hesitation.-->
## Usage
<!---Link to the public part of the PRD, or to the related product discussion for experimental features-->
## TODO
<!---If necessary, create a list with technical/product steps-->
### Are you modifying a database?
- [ ] If not, add the `no db change` label to your PR, and you're good to go.
- [ ] If yes, add the `db change` label to your PR and you're good to go.
- [ ] /!\ Ensure all the read operations still work!
- If the change happened in milli, you may need to check the version of the database before doing any read operation
- If the change happened in the index-scheduler, make sure the new code can immediately read the old database
- If the change happened in the meilisearch-auth database, reach out to the team; we don't know yet how to handle these changes
- [ ] Write the code to go from the old database to the new one
- If the change happened in milli, the upgrade function should be written and called [here](https://github.com/meilisearch/meilisearch/blob/3fd86e8d76d7d468b0095d679adb09211ca3b6c0/crates/milli/src/update/upgrade/mod.rs#L24-L47)
- If the change happened in the index-scheduler, we've never done it yet, but the right place to do it should be [here](https://github.com/meilisearch/meilisearch/blob/3fd86e8d76d7d468b0095d679adb09211ca3b6c0/crates/index-scheduler/src/scheduler/process_upgrade/mod.rs#L13)
- [ ] Write an integration test [here](https://github.com/meilisearch/meilisearch/blob/main/crates/meilisearch/tests/upgrade/mod.rs) ensuring you can read the old database, upgrade to the new database, and read the new database as expected
### Reminders when modifying the API
- [ ] Update the openAPI file with utoipa:
- [ ] If a new module has been introduced, create a new structure deriving [the OpenAPI proc-macro](https://docs.rs/utoipa/latest/utoipa/derive.OpenApi.html) and nest it in the main [openAPI structure](https://github.com/meilisearch/meilisearch/blob/f2185438eed60fa32d25b15480c5ee064f6fba4a/crates/meilisearch/src/routes/mod.rs#L64-L78).
- [ ] If a new route has been introduced, add the [path decorator](https://docs.rs/utoipa/latest/utoipa/attr.path.html) to it and add the route at the top of the file in its openAPI structure.
- [ ] If a structure which is deserialized or serialized in the API has been introduced or modified, it must derive the [`schema`](https://docs.rs/utoipa/latest/utoipa/macro.schema.html) or the [`IntoParams`](https://docs.rs/utoipa/latest/utoipa/derive.IntoParams.html) proc-macro.
If it's a **new** structure you must also add it to the big list of structures [in the main `OpenApi` structure](https://github.com/meilisearch/meilisearch/blob/f2185438eed60fa32d25b15480c5ee064f6fba4a/crates/meilisearch/src/routes/mod.rs#L88).
- [ ] Once everything is done, start Meilisearch with the swagger flag: `cargo run --features swagger`, open `http://localhost:7700/scalar` on your browser, and ensure everything works as expected.
- For more info, refer to [this presentation](https://pitch.com/v/generating-the-openapi-file-jrn3nh).
### Reminders when modifying the Setting API
<!--- Special steps to remind when adding a new index setting -->
- [ ] Ensure the new setting route is at least tested by the [`test_setting_routes` macro](https://github.com/meilisearch/meilisearch/blob/5204c0b60b384cbc79621b6b2176fca086069e8e/meilisearch/tests/settings/get_settings.rs#L276)
- [ ] Ensure Analytics are fully implemented
- [ ] `/settings/my-new-setting` configurated in the [`make_setting_routes` macro](https://github.com/meilisearch/meilisearch/blob/5204c0b60b384cbc79621b6b2176fca086069e8e/meilisearch/src/routes/indexes/settings.rs#L141-L165)
- [ ] global `/settings` route configurated in the [`update_all` function](https://github.com/meilisearch/meilisearch/blob/5204c0b60b384cbc79621b6b2176fca086069e8e/meilisearch/src/routes/indexes/settings.rs#L655-L751)
- [ ] Ensure the dump serializing is consistent with the `/settings` route serializing, e.g., enums case can be different (`camelCase` in route and `PascalCase` in the dump)
#### Special cases when adding a setting for an experimental feature
- [ ] ⚠️ API stability: The setting does not appear on the main settings route when the feature has never been enabled (e.g. mark it `Unset` when returned from the index in this situation. See [an example](https://github.com/meilisearch/meilisearch/blob/7a89abd2a025606a42f8b219e539117eb2eb029f/meilisearch-types/src/settings.rs#L608))
- [ ] The setting cannot be set when the feature is disabled, either by the main settings route or the subroute (see [`validate_settings` function](https://github.com/meilisearch/meilisearch/blob/7a89abd2a025606a42f8b219e539117eb2eb029f/meilisearch/src/routes/indexes/settings.rs#L811))
- [ ] If possible, the setting is reset when the feature is disabled (hard if it requires reindexing)
## Impacted teams
<!---Ping the related teams. Ask for the engine manager if any hesitation-->
<!---@meilisearch/docs-team when there is any API change, e.g. settings addition-->