Add support for prettifying index constraint errors with their descri…

…ption

Depends-on: balena-io-modules/abstract-sql-compiler#237
Change-type: minor

src/sbvr-api/sbvr-utils.ts

@@ -254,9 +254,26 @@ const prettifyConstraintError = (
 				case 'postgres': {
 					const resourceName = resolveSynonym(request);
 					const abstractSqlModel = getFinalAbstractSqlModel(request);
-					matches = new RegExp(
-						'"' + abstractSqlModel.tables[resourceName].name + '_(.*?)_key"',
-					).exec(err.message);
+					const table = abstractSqlModel.tables[resourceName];
+					matches = new RegExp('"' + table.name + '_(.*?)_key"').exec(
+						err.message,
+					);
+					if (matches == null && table.indexes.length > 0) {
+						const violatedConstraintName =
+							/duplicate key value violates unique constraint "(.*)"/.exec(
+								err.message,
+							)?.[1];
+						if (violatedConstraintName != null) {
+							const index = table.indexes.find(
+								(idx) =>
+									idx.name === violatedConstraintName &&
+									idx.description != null,
+							);
+							if (index != null) {
+								throw new BadRequestError(index.description);
+							}
+						}
+					}
 					break;
 				}
 			}