Add API to opt out of case conversion#4364
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We have tested this in staging |
Add RawModuleDefV10Builder::set_case_conversion_policy() and an internal register_case_conversion_policy() function in rt.rs. This allows modules like controldb to disable case conversion via a __preinit__ hook, avoiding migration errors when existing data uses a different naming convention. Re-exports CaseConversionPolicy from the bindings crate for convenience.
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Shubham8287
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Feb 20, 2026
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Changes in this PR will get merged through - https://github.com/clockworklabs/SpacetimeDB/pull/4366/changes. |
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Changes in this PR will get merged through - https://github.com/clockworklabs/SpacetimeDB/pull/4366/changes. |
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## Summary
Adds a cross-language `#[spacetimedb::settings]` mechanism for declaring
module-level settings. The first supported setting is
`CASE_CONVERSION_POLICY`, which controls how identifiers are
case-converted.
### Rust
```rust
use spacetimedb::CaseConversionPolicy;
#[spacetimedb::settings]
const CASE_CONVERSION_POLICY: CaseConversionPolicy = CaseConversionPolicy::None;
```
- Proc macro validates const name against `KNOWN_SETTINGS`
- Generates `__preinit__` export for registration
- Duplicate settings produce a linker error (duplicate symbol)
### TypeScript
```ts
export const moduleSettings: ModuleSettings = {
caseConversionPolicy: CaseConversionPolicy.None,
};
```
- `ModuleSettings` interface with typed fields
- `caseConversionPolicy` section pushed in `rawModuleDefV10()`
## Stacked on
- `shub/case-conversion` (base)
- PR #4364 (internal opt-out API)
This PR adds the proper user-facing API on top of the internal mechanism
in #4364.
Co-authored-by: clockwork-labs-bot <clockwork-labs-bot@users.noreply.github.com>
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Companion to the case conversion PR (#4263).
Adds an API for existing modules to disable automatic case conversion, preventing migration errors from renamed fields or enum variants when deploying the case conversion feature against modules with existing data.
Changes:
RawModuleDefV10Builder::set_case_conversion_policy(policy)— sets the module-level case conversion policyspacetimedb::rt::register_no_case_conversion()— convenience function for modules to disable case conversionUsage in a module:
This is needed for the controldb module which has existing data with PascalCase enum variants (
Owner,Admin, etc.) that would be renamed to camelCase (owner,admin, etc.) by the default SnakeCase policy.