feat(isostring): force-fail no TZ dates on UTC machines

Pocket · Feb 15, 2023 · ba8504c · ba8504c
1 parent 8705282
commit ba8504c
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/isoStringScalar/isoStringScalar.ts b/src/isoStringScalar/isoStringScalar.ts
@@ -1,5 +1,5 @@
 import { GraphQLScalarType, Kind } from 'graphql';
-import { DateTime } from 'luxon';
+import { DateTime, Settings } from 'luxon';
 import {
   InternalServerError,
   UserInputError,
@@ -58,6 +58,9 @@ export const isoStringScalar = new GraphQLScalarType({
       );
     }
 
+    // We only want explicitly UTC dates passed in. So we set the default TZ to US Central
+    // to force an error on any dates not set to any timezone (which might still fly if the machine is set to UTC).
+    Settings.defaultZoneName = 'America/Denver';
     const isoDateTime = DateTime.fromISO(value, { setZone: true });
     if (!(isoDateTime.offset === 0) || !isoDateTime.isValid) {
       throw new UserInputError(