fix: defaults for ref schemas (#262)

schema.go

@@ -1261,42 +1261,38 @@ func validateDefault(name string, schema Schema, def any) (any, error) {
 	if !ok {
 		return nil, fmt.Errorf("avro: invalid default for field %s. %+v not a %s", name, def, schema.Type())
 	}
-
 	return def, nil
 }
 
 func isValidDefault(schema Schema, def any) (any, bool) {
 	switch schema.Type() {
+	case Ref:
+		ref := schema.(*RefSchema)
+		return isValidDefault(ref.Schema(), def)
 	case Null:
 		return nullDefault, def == nil
-
 	case Enum:
 		v, ok := def.(string)
 		if !ok || len(v) == 0 {
 			return def, false
 		}
 
-		enumSchema := schema.(*EnumSchema)
-		found := false
-		for i := range enumSchema.symbols {
-			if def == enumSchema.symbols[i] {
+		var found bool
+		for _, sym := range schema.(*EnumSchema).symbols {
+			if def == sym {
 				found = true
 				break
 			}
 		}
-
 		return def, found
-
 	case String, Bytes, Fixed:
 		if _, ok := def.(string); ok {
 			return def, true
 		}
-
 	case Boolean:
 		if _, ok := def.(bool); ok {
 			return def, true
 		}
-
 	case Int:
 		if i, ok := def.(int8); ok {
 			return int(i), true
@@ -1313,75 +1309,65 @@ func isValidDefault(schema Schema, def any) (any, bool) {
 		if f, ok := def.(float64); ok {
 			return int(f), true
 		}
-
 	case Long:
 		if _, ok := def.(int64); ok {
 			return def, true
 		}
 		if f, ok := def.(float64); ok {
 			return int64(f), true
 		}
-
 	case Float:
 		if _, ok := def.(float32); ok {
 			return def, true
 		}
 		if f, ok := def.(float64); ok {
 			return float32(f), true
 		}
-
 	case Double:
 		if _, ok := def.(float64); ok {
 			return def, true
 		}
-
 	case Array:
 		arr, ok := def.([]any)
 		if !ok {
 			return nil, false
 		}
 
-		arrSchema := schema.(*ArraySchema)
+		as := schema.(*ArraySchema)
 		for i, v := range arr {
-			v, ok := isValidDefault(arrSchema.Items(), v)
+			v, ok := isValidDefault(as.Items(), v)
 			if !ok {
 				return nil, false
 			}
 			arr[i] = v
 		}
-
 		return arr, true
-
 	case Map:
 		m, ok := def.(map[string]any)
 		if !ok {
 			return nil, false
 		}
 
-		mapSchema := schema.(*MapSchema)
+		ms := schema.(*MapSchema)
 		for k, v := range m {
-			v, ok := isValidDefault(mapSchema.Values(), v)
+			v, ok := isValidDefault(ms.Values(), v)
 			if !ok {
 				return nil, false
 			}
 
 			m[k] = v
 		}
-
 		return m, true
-
 	case Union:
 		unionSchema := schema.(*UnionSchema)
 		return isValidDefault(unionSchema.Types()[0], def)
-
 	case Record:
 		m, ok := def.(map[string]any)
 		if !ok {
 			return nil, false
 		}
 
-		recordSchema := schema.(*RecordSchema)
-		for _, field := range recordSchema.Fields() {
+		for _, field := range schema.(*RecordSchema).Fields() {
 			fieldDef := field.Default()
 			if newDef, ok := m[field.Name()]; ok {
 				fieldDef = newDef
@@ -1394,10 +1380,8 @@ func isValidDefault(schema Schema, def any) (any, bool) {
 
 			m[field.Name()] = v
 		}
-
 		return m, true
 	}
-
 	return nil, false
 }
 
@@ -1410,10 +1394,9 @@ func schemaTypeName(schema Schema) string {
 		return n.FullName()
 	}
 
-	name := string(schema.Type())
+	sname := string(schema.Type())
 	if lt := getLogicalType(schema); lt != "" {
-		name += "." + string(lt)
+		sname += "." + string(lt)
 	}
-
-	return name
+	return sname
 }