fix(firestore): remove designated initializers for force_index (#16229)

Author: dlarocque

Firestore/CHANGELOG.md

@@ -1,3 +1,7 @@
+# Unreleased
+
+- [fix] Remove use of designated initializers for `forceIndex` [#16229].
+
 # 12.13.0
 - [feature] Added search stage support for `languageCode`, `offset`, `limit`, and `retrievalDepth`.
 - [feature] Added support for Pipeline expressions `arraySlice`, `arrayFilter`, `arrayTransform` and `arrayTransformWithIndex`. (#16001)

Firestore/core/src/api/stages.cc

@@ -71,9 +71,11 @@ google_firestore_v1_Pipeline_Stage CollectionSource::to_proto() const {
         nanopb::MakeArray<google_firestore_v1_Pipeline_Stage_OptionsEntry>(1);
 
     result.options[0].key = nanopb::MakeBytesArray("force_index");
-    result.options[0].value = google_firestore_v1_Value{
-        .which_value_type = google_firestore_v1_Value_string_value_tag,
-        .string_value = nanopb::MakeBytesArray(force_index_.value())};
+
+    google_firestore_v1_Value value = {};
+    value.which_value_type = google_firestore_v1_Value_string_value_tag;
+    value.string_value = nanopb::MakeBytesArray(force_index_.value());
+    result.options[0].value = value;
   } else {
     result.options_count = 0;
     result.options = nullptr;
@@ -136,9 +138,11 @@ google_firestore_v1_Pipeline_Stage CollectionGroupSource::to_proto() const {
         nanopb::MakeArray<google_firestore_v1_Pipeline_Stage_OptionsEntry>(1);
 
     result.options[0].key = nanopb::MakeBytesArray("force_index");
-    result.options[0].value = google_firestore_v1_Value{
-        .which_value_type = google_firestore_v1_Value_string_value_tag,
-        .string_value = nanopb::MakeBytesArray(force_index_.value())};
+
+    google_firestore_v1_Value value = {};
+    value.which_value_type = google_firestore_v1_Value_string_value_tag;
+    value.string_value = nanopb::MakeBytesArray(force_index_.value());
+    result.options[0].value = value;
   } else {
     result.options_count = 0;
     result.options = nullptr;