fix: report resource conflicts and accurate CLI API errors

back/loaders/express.ts

@@ -14,6 +14,7 @@ import { AuthInfo } from '../data/system';
 import path from 'path';
 import { t } from '../shared/i18n';
 import { AppScope } from '../data/open';
+import uniqueConstraintError from '../middlewares/uniqueConstraintError';
 import protectedPathCase from '../middlewares/protectedPathCase';
 
 function resolveTrustProxy(value = process.env.QL_TRUST_PROXY) {
@@ -190,6 +191,7 @@ export default ({ app }: { app: Application }) => {
   });
 
   app.use(errors());
+  app.use(uniqueConstraintError);
 
   app.use(
     (

back/middlewares/uniqueConstraintError.ts

@@ -0,0 +1,14 @@
+import { ErrorRequestHandler } from 'express';
+import { UniqueConstraintError } from 'sequelize';
+import { t } from '../shared/i18n';
+
+// Handle the database constraint itself so concurrent writes are covered too.
+const uniqueConstraintError: ErrorRequestHandler = (err, req, res, next) => {
+  if (!(err instanceof UniqueConstraintError)) return next(err);
+  // Constraint details can contain environment values or application credentials.
+  res
+    .status(409)
+    .json({ code: 409, message: t('资源已存在，请检查重复的名称或值') });
+};
+
+export default uniqueConstraintError;

back/shared/i18n.ts

@@ -3,6 +3,7 @@ import { shareStore } from './store';
 const messages: Record<string, Record<string, string>> = {
   zh: {},
   en: {
+    '资源已存在，请检查重复的名称或值': 'Resource already exists; check for duplicate names or values',
     '暂无权限': 'Access denied',
     '参数错误': 'Invalid parameter',
     '参数不正确': 'Invalid parameter',