fix: tristate_optionals - defining originalSymbolName

codegen/end_to_end_test_tristate/build.yaml

@@ -12,28 +12,36 @@ targets:
         options:
           schema: end_to_end_test_tristate|lib/graphql/schema.graphql
           custom_serializers:
-            - import: 'package:end_to_end_test_tristate/date_serializer.dart'
+            - import: "package:end_to_end_test_tristate/date_serializer.dart"
               name: DateSerializer
-            - import: 'package:end_to_end_test_tristate/custom_field_serializer.dart'
+            - import: "package:end_to_end_test_tristate/custom_field_serializer.dart"
               name: CustomFieldSerializer
+            - import: "package:end_to_end_test_tristate/custom_date_serializer.dart"
+              name: CustomDateSerializer
           type_overrides:
-            Date:
+            DateTime:
               name: DateTime
             CustomField:
               name: CustomField
-              import: 'package:end_to_end_test_tristate/custom_field.dart'
+              import: "package:end_to_end_test_tristate/custom_field.dart"
+            Date:
+              name: CustomDate
+              import: "package:end_to_end_test_tristate/custom_date.dart"
       gql_build|schema_builder:
         enabled: true
         options:
           tristate_optionals: true
           enum_fallbacks:
             LengthUnit: METER
           type_overrides:
-            Date:
+            DateTime:
               name: DateTime
             CustomField:
               name: CustomField
-              import: 'package:end_to_end_test_tristate/custom_field.dart'
+              import: "package:end_to_end_test_tristate/custom_field.dart"
+            Date:
+              name: CustomDate
+              import: "package:end_to_end_test_tristate/custom_date.dart"
       gql_build|data_builder:
         enabled: true
         options:
@@ -42,20 +50,26 @@ targets:
             when: true
             maybeWhen: true
           type_overrides:
-            Date:
+            DateTime:
               name: DateTime
             CustomField:
               name: CustomField
-              import: 'package:end_to_end_test_tristate/custom_field.dart'
+              import: "package:end_to_end_test_tristate/custom_field.dart"
+            Date:
+              name: CustomDate
+              import: "package:end_to_end_test_tristate/custom_date.dart"
       gql_build|var_builder:
         enabled: true
         options:
           schema: end_to_end_test_tristate|lib/graphql/schema.graphql
           tristate_optionals: true
           vars_create_factories: true
           type_overrides:
-            Date:
+            DateTime:
               name: DateTime
             CustomField:
               name: CustomField
-              import: 'package:end_to_end_test_tristate/custom_field.dart'
+              import: "package:end_to_end_test_tristate/custom_field.dart"
+            Date:
+              name: CustomDate
+              import: "package:end_to_end_test_tristate/custom_date.dart"

codegen/end_to_end_test_tristate/lib/custom_date.dart

@@ -0,0 +1,19 @@
+class CustomDate extends DateTime {
+  CustomDate(
+    super.year,
+    super.month,
+    super.day,
+  );
+
+  static CustomDate parse(String formattedString) {
+    final DateTime dateTime = DateTime.parse(formattedString);
+    return CustomDate(dateTime.year, dateTime.month, dateTime.day);
+  }
+
+  @override
+  CustomDate toLocal() {
+    final DateTime localDateTime = super.toLocal();
+    return CustomDate(
+        localDateTime.year, localDateTime.month, localDateTime.day);
+  }
+}

codegen/end_to_end_test_tristate/lib/custom_date_serializer.dart

@@ -0,0 +1,30 @@
+import 'package:built_value/serializer.dart';
+import 'package:end_to_end_test_tristate/custom_date.dart';
+
+class CustomDateSerializer implements PrimitiveSerializer<CustomDate> {
+  @override
+  CustomDate deserialize(
+    Serializers serializers,
+    Object serialized, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    assert(serialized is String,
+        "CustomDateSerializer expected 'String' but got ${serialized.runtimeType}");
+    return CustomDate.parse(serialized as String).toLocal();
+  }
+
+  @override
+  String serialize(
+    Serializers serializers,
+    CustomDate date, {
+    FullType specifiedType = FullType.unspecified,
+  }) {
+    return date.toUtc().toIso8601String().split('T').first;
+  }
+
+  @override
+  Iterable<Type> get types => [CustomDate];
+
+  @override
+  String get wireName => 'Date';
+}