From 233a6f9fb105309b7397d65530a7c748822613da Mon Sep 17 00:00:00 2001
From: machinagod <afonso.ricardo@gmail.com>
Date: Thu, 11 Jun 2026 09:05:24 +0100
Subject: [PATCH] fix(server): register Lingui message compiler to stop
 "Uncompiled message detected" log flood (#21416)
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## Summary

Fixes #21415.

Server-side `` t`…` `` macro calls (e.g. `FlatEntityMapsException`)
resolve against Lingui's global `i18n` singleton, which `I18nService`
never loads a catalog into and never registers a messages compiler on.
With no `_messageCompiler` set, every such lookup logs `Uncompiled
message detected!` and falls back to the raw string — flooding server
logs (enough to hit hosting log rate limits) and disabling ICU
interpolation on those messages. The warning is emitted unconditionally
by `@lingui/core` (not `NODE_ENV`-gated).

## Changes

Register `compileMessage` via `setMessagesCompiler` in
`I18nService.loadTranslations()`:
- on the global `i18n` singleton (used by the `t` macro), and
- on each per-locale instance.

`@lingui/message-utils` is already a transitive **runtime** dependency
of `@lingui/core` (`@lingui/core@5.1.2 → @lingui/message-utils@^5.1.2`),
so no new dependency is added.

## Testing

Deployed on a real instance: before, the server emitted hundreds of
`Uncompiled message detected` lines/sec (saturating the log rate limit);
after, steady-state shows `0`, and the worker (which shares the code
path) likewise shows `0`. App behaviour is unchanged — messages already
rendered via fallback; this silences the warning and enables ICU on the
affected messages.

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>
Co-authored-by: Félix Malfait <felix@twenty.com>
---
 .../src/engine/core-modules/i18n/i18n.service.ts           | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/twenty-server/src/engine/core-modules/i18n/i18n.service.ts b/packages/twenty-server/src/engine/core-modules/i18n/i18n.service.ts
index 42d26eea97..25a0c90f88 100644
--- a/packages/twenty-server/src/engine/core-modules/i18n/i18n.service.ts
+++ b/packages/twenty-server/src/engine/core-modules/i18n/i18n.service.ts
@@ -1,11 +1,13 @@
 import { Injectable, type OnModuleInit } from '@nestjs/common';
 
 import {
+  i18n,
   type I18n,
   type MessageOptions,
   type Messages,
   setupI18n,
 } from '@lingui/core';
+import { compileMessage } from '@lingui/message-utils/compileMessage';
 import { type APP_LOCALES, SOURCE_LOCALE } from 'twenty-shared/translations';
 
 import { messages as afMessages } from 'src/engine/core-modules/i18n/locales/generated/af-ZA';
@@ -46,6 +48,10 @@ export class I18nService implements OnModuleInit {
     {} as Record<keyof typeof APP_LOCALES, I18n>;
 
   async loadTranslations() {
+    // The global i18n singleton backs server-side t`…` calls and has no
+    // compiled catalog, so it needs a runtime message compiler.
+    i18n.setMessagesCompiler(compileMessage);
+
     const messagesByLocale: Record<keyof typeof APP_LOCALES, Messages> = {
       en: enMessages,
       'pseudo-en': pseudoEnMessages,
@@ -85,6 +91,7 @@ export class I18nService implements OnModuleInit {
     ).forEach(([locale, messages]) => {
       const localeI18n = setupI18n();
 
+      localeI18n.setMessagesCompiler(compileMessage);
       localeI18n.load(locale, messages);
       localeI18n.activate(locale);