fix: record cache fingerprint

config_internal_test.go

@@ -44,6 +44,57 @@ func TestConfig_ReusesDecoders(t *testing.T) {
 	assert.Same(t, dec1, dec2)
 }
 
+func TestConfig_ReusesDecoders_WithRecordFieldActions(t *testing.T) {
+	type testObj struct {
+		A int64  `avro:"a"`
+		B string `avro:"b"`
+	}
+	sch := `{
+		"type": "record",
+		"name": "test",
+		"fields" : [
+			{"name": "a", "type": "long"},
+			{"name": "a", "type": "string", "default": "foo"}
+		]
+	}`
+	typ := reflect2.TypeOfPtr(&testObj{})
+
+	t.Run("set default", func(t *testing.T) {
+		api := Config{
+			TagKey:      "test",
+			BlockLength: 2,
+		}.Freeze()
+		cfg := api.(*frozenConfig)
+
+		schema1 := MustParse(sch)
+		schema2 := MustParse(sch)
+		schema2.(*RecordSchema).Fields()[1].action = FieldSetDefault
+
+		dec1 := cfg.DecoderOf(schema1, typ)
+		dec2 := cfg.DecoderOf(schema2, typ)
+
+		assert.NotSame(t, dec1, dec2)
+	})
+
+	t.Run("ignore", func(t *testing.T) {
+		api := Config{
+			TagKey:      "test",
+			BlockLength: 2,
+		}.Freeze()
+		cfg := api.(*frozenConfig)
+
+		schema1 := MustParse(sch)
+		schema1.(*RecordSchema).Fields()[0].action = FieldIgnore
+		schema2 := MustParse(sch)
+
+		dec1 := cfg.DecoderOf(schema1, typ)
+		dec2 := cfg.DecoderOf(schema2, typ)
+
+		assert.NotSame(t, dec1, dec2)
+	})
+
+}
+
 func TestConfig_DisableCache_DoesNotReuseDecoders(t *testing.T) {
 	type testObj struct {
 		A int64 `avro:"a"`

schema.go

@@ -658,6 +658,9 @@ func (s *RecordSchema) CacheFingerprint() [32]byte {
 		if field.HasDefault() && field.action == FieldSetDefault {
 			data = append(data, field.Name(), field.Default())
 		}
+		if field.action == FieldIgnore {
+			data = append(data, field.Name()+string(FieldIgnore))
+		}
 	}
 	if len(data) == 0 {
 		return s.Fingerprint()