From b0a52de4ea5709152cbffa8a1063b127c970a18c Mon Sep 17 00:00:00 2001
From: pavel <pavelflegr@gmail.com>
Date: Thu, 27 Aug 2026 16:57:12 +0200
Subject: [PATCH] Fix camel case JSON tags

---
 internal/lang/data_class_test.go | 8 +++++---
 internal/lang/generate_go.go     | 5 ++++-
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/internal/lang/data_class_test.go b/internal/lang/data_class_test.go
index 84f6242..57a9e0c 100644
--- a/internal/lang/data_class_test.go
+++ b/internal/lang/data_class_test.go
@@ -30,7 +30,7 @@ func TestGenerateGoDataClassJSONNamingOverride(t *testing.T) {
 package demo
 
 @jsonNaming(camelCase)
-data class Account(var availableBalance: Double)
+data class Account(var availableBalance: Double, var Type: String)
 `)
 	if err != nil {
 		t.Fatalf("parse failed: %v", err)
@@ -39,8 +39,10 @@ data class Account(var availableBalance: Double)
 	if err != nil {
 		t.Fatalf("generation failed: %v", err)
 	}
-	if !strings.Contains(string(out), "`json:\"availableBalance\"`") {
-		t.Fatalf("generated Go missing camelCase tag:\n%s", out)
+	for _, want := range []string{"`json:\"availableBalance\"`", "`json:\"type\"`"} {
+		if !strings.Contains(string(out), want) {
+			t.Fatalf("generated Go missing camelCase tag %q:\n%s", want, out)
+		}
 	}
 }
 
diff --git a/internal/lang/generate_go.go b/internal/lang/generate_go.go
index c11b976..bc59dfc 100644
--- a/internal/lang/generate_go.go
+++ b/internal/lang/generate_go.go
@@ -1960,7 +1960,10 @@ func jsonFieldName(name, policy string) string {
 	case "", "snakeCase":
 		return snakeCase(name)
 	case "camelCase":
-		return name
+		if name == "" {
+			return name
+		}
+		return strings.ToLower(name[:1]) + name[1:]
 	case "pascalCase":
 		return exportedGoName(name)
 	case "kebabCase":