feat: 增强 nil 值处理能力

主要改进:
- 简化 setValue 方法中的 nil 值处理逻辑,统一设置为目标类型的零值
- 修复 setFieldValue 方法中 map 类型设置 nil 值时的问题
- 新增完整的 nil 值设置测试,覆盖所有 Go 基础类型和复合类型

测试覆盖:
- 指针、接口、切片、map、channel、func 等可空类型设置为 nil
- int/uint 系列、float 系列、bool、string 等基础类型设置为零值
- 嵌套结构体和 map 中的 nil 值设置
This commit is contained in:
what 2025-12-09 15:11:18 +08:00
parent 6e3593f188
commit fbba6f9a30
2 changed files with 415 additions and 90 deletions

178
rfx.go
View File

@ -209,6 +209,13 @@ func (r *rfx) setFieldValue(target reflect.Value, key string, v any) bool {
if target.IsNil() {
target.Set(reflect.MakeMap(target.Type()))
}
// 处理 nil 值的情况
if v == nil {
target.SetMapIndex(reflect.ValueOf(key), reflect.Zero(target.Type().Elem()))
return true
}
val := reflect.ValueOf(v)
if !val.Type().AssignableTo(target.Type().Elem()) {
// 尝试转换
@ -275,106 +282,97 @@ func (r *rfx) setValue(field reflect.Value, v any) bool {
targetType := field.Type()
if !val.IsValid() {
// 如果值无效(通常是 nil 的情况)
// 对于可以为 nil 的类型,直接设置零值
switch targetType.Kind() {
case reflect.Ptr, reflect.Interface, reflect.Slice, reflect.Map, reflect.Chan, reflect.Func:
field.Set(reflect.Zero(targetType))
return true
default:
// 对于基础类型,继续使用后面的 cast 转换逻辑
// 不提前返回 false
}
} else {
// 如果 val 有效,进行正常的类型处理
// 统一解开最外层的 interface 包装,便于后续根据底层实际类型做处理
for val.Kind() == reflect.Interface && !val.IsNil() {
val = val.Elem()
}
val = reflect.Zero(targetType)
}
// 尝试直接赋值(类型完全匹配)
// 如果 val 有效,进行正常的类型处理
// 统一解开最外层的 interface 包装,便于后续根据底层实际类型做处理
for val.Kind() == reflect.Interface && !val.IsNil() {
val = val.Elem()
}
// 尝试直接赋值(类型完全匹配)
if val.Type().AssignableTo(targetType) {
field.Set(val)
return true
}
// 如果源值是指针但目标不是指针,尝试解引用后再赋值
if val.Kind() == reflect.Ptr && !val.IsNil() && targetType.Kind() != reflect.Ptr {
derefVal := val.Elem()
if derefVal.Type().AssignableTo(targetType) {
field.Set(derefVal)
return true
}
// 解引用后继续使用下面的逻辑处理
val = derefVal
}
switch targetType.Kind() {
case reflect.Ptr:
// 处理指针类型
// 如果传入的值已经是指针类型,尝试直接赋值
if val.Type().AssignableTo(targetType) {
field.Set(val)
return true
}
// 如果源值是指针但目标不是指针,尝试解引用后再赋值
if val.Kind() == reflect.Ptr && !val.IsNil() && targetType.Kind() != reflect.Ptr {
derefVal := val.Elem()
if derefVal.Type().AssignableTo(targetType) {
field.Set(derefVal)
return true
}
// 解引用后继续使用下面的逻辑处理
val = derefVal
// 如果传入的值不是指针,创建新指针并设置值
elemType := targetType.Elem()
newPtr := reflect.New(elemType)
// 递归设置指针指向的值
if !r.setValue(newPtr.Elem(), v) {
return false
}
switch targetType.Kind() {
case reflect.Ptr:
// 处理指针类型
// 如果传入的值已经是指针类型,尝试直接赋值
if val.Type().AssignableTo(targetType) {
field.Set(val)
return true
}
// 如果传入的值不是指针,创建新指针并设置值
elemType := targetType.Elem()
newPtr := reflect.New(elemType)
// 递归设置指针指向的值
if !r.setValue(newPtr.Elem(), v) {
return false
}
field.Set(newPtr)
return true
case reflect.Slice: // 处理切片类型,支持从通用切片(如 []any)转换
if val.Kind() != reflect.Slice && val.Kind() != reflect.Array {
return false
}
newSlice := reflect.MakeSlice(targetType, val.Len(), val.Len())
for i := 0; i < val.Len(); i++ {
if !r.setValue(newSlice.Index(i), val.Index(i)) {
return false
}
}
field.Set(newSlice)
return true
case reflect.Struct:
// 遍历目标结构体的字段,从源值(结构体或 map)中按字段名取值并设置
// 仅支持从 struct 或 map 填充
if val.Kind() != reflect.Struct && val.Kind() != reflect.Map {
return false
}
fieldType := field.Type()
for i := 0; i < fieldType.NumField(); i++ {
dstField := field.Field(i)
if !dstField.CanSet() {
continue
}
valField := getValueByPath(val, fieldType.Field(i).Name)
if !valField.IsValid() {
continue
}
// 使用 setValue 复用现有的类型转换逻辑,忽略单个字段失败
if !r.setValue(dstField, valField) {
return false
}
}
return true
field.Set(newPtr)
return true
case reflect.Slice: // 处理切片类型,支持从通用切片(如 []any)转换
if val.Kind() != reflect.Slice && val.Kind() != reflect.Array {
return false
}
newSlice := reflect.MakeSlice(targetType, val.Len(), val.Len())
for i := 0; i < val.Len(); i++ {
if !r.setValue(newSlice.Index(i), val.Index(i)) {
return false
}
}
field.Set(newSlice)
return true
case reflect.Struct:
// 遍历目标结构体的字段,从源值(结构体或 map)中按字段名取值并设置
// 仅支持从 struct 或 map 填充
if val.Kind() != reflect.Struct && val.Kind() != reflect.Map {
return false
}
fieldType := field.Type()
for i := 0; i < fieldType.NumField(); i++ {
dstField := field.Field(i)
if !dstField.CanSet() {
continue
}
valField := getValueByPath(val, fieldType.Field(i).Name)
if !valField.IsValid() {
continue
}
// 使用 setValue 复用现有的类型转换逻辑,忽略单个字段失败
if !r.setValue(dstField, valField) {
return false
}
}
return true
}
// 优先使用 cast 进行智能类型转换

327
rfx_nil_test.go Normal file
View File

@ -0,0 +1,327 @@
package reflux
import (
"testing"
)
// TestSetValueWithNil 测试 setValue 方法处理 nil 值的各种情况
func TestSetValueWithNil(t *testing.T) {
t.Run("Set nil to pointer field", func(t *testing.T) {
type Data struct {
Ptr *string
}
data := Data{Ptr: stringPtr("initial")}
rfx := New(&data)
rfx.Set("Ptr", nil)
if data.Ptr != nil {
t.Errorf("Expected Ptr to be nil, got %v", data.Ptr)
}
})
t.Run("Set nil to interface field", func(t *testing.T) {
type Data struct {
Iface interface{}
}
data := Data{Iface: "initial"}
rfx := New(&data)
rfx.Set("Iface", nil)
if data.Iface != nil {
t.Errorf("Expected Iface to be nil, got %v", data.Iface)
}
})
t.Run("Set nil to slice field", func(t *testing.T) {
type Data struct {
Slice []string
}
data := Data{Slice: []string{"a", "b"}}
rfx := New(&data)
rfx.Set("Slice", nil)
if data.Slice != nil {
t.Errorf("Expected Slice to be nil, got %v", data.Slice)
}
})
t.Run("Set nil to map field", func(t *testing.T) {
type Data struct {
Map map[string]string
}
data := Data{Map: map[string]string{"key": "value"}}
rfx := New(&data)
rfx.Set("Map", nil)
if data.Map != nil {
t.Errorf("Expected Map to be nil, got %v", data.Map)
}
})
t.Run("Set nil to int field - should set to zero value", func(t *testing.T) {
type Data struct {
Value int
}
data := Data{Value: 42}
rfx := New(&data)
rfx.Set("Value", nil)
if data.Value != 0 {
t.Errorf("Expected Value to be 0, got %d", data.Value)
}
})
t.Run("Set nil to string field - should set to zero value", func(t *testing.T) {
type Data struct {
Value string
}
data := Data{Value: "hello"}
rfx := New(&data)
rfx.Set("Value", nil)
if data.Value != "" {
t.Errorf("Expected Value to be empty string, got %s", data.Value)
}
})
t.Run("Set nil to bool field - should set to zero value", func(t *testing.T) {
type Data struct {
Value bool
}
data := Data{Value: true}
rfx := New(&data)
rfx.Set("Value", nil)
if data.Value != false {
t.Errorf("Expected Value to be false, got %v", data.Value)
}
})
t.Run("Set nil to float64 field - should set to zero value", func(t *testing.T) {
type Data struct {
Value float64
}
data := Data{Value: 3.14}
rfx := New(&data)
rfx.Set("Value", nil)
if data.Value != 0.0 {
t.Errorf("Expected Value to be 0.0, got %f", data.Value)
}
})
t.Run("Set nil to uint field - should set to zero value", func(t *testing.T) {
type Data struct {
Value uint
}
data := Data{Value: 100}
rfx := New(&data)
rfx.Set("Value", nil)
if data.Value != 0 {
t.Errorf("Expected Value to be 0, got %d", data.Value)
}
})
t.Run("Set nil to nested pointer field", func(t *testing.T) {
type Inner struct {
Value string
}
type Outer struct {
Inner *Inner
}
data := Outer{Inner: &Inner{Value: "test"}}
rfx := New(&data)
rfx.Set("Inner", nil)
if data.Inner != nil {
t.Errorf("Expected Inner to be nil, got %v", data.Inner)
}
})
t.Run("Set nil in map", func(t *testing.T) {
m := map[string]interface{}{
"ptr": stringPtr("test"),
"slice": []int{1, 2, 3},
"map": map[string]string{"key": "value"},
}
rfx := New(&m)
rfx.Set("ptr", nil)
rfx.Set("slice", nil)
rfx.Set("map", nil)
if m["ptr"] != nil {
t.Errorf("Expected ptr to be nil, got %v", m["ptr"])
}
if m["slice"] != nil {
t.Errorf("Expected slice to be nil, got %v", m["slice"])
}
if m["map"] != nil {
t.Errorf("Expected map to be nil, got %v", m["map"])
}
})
t.Run("Set nil to various int types", func(t *testing.T) {
type Data struct {
Int8 int8
Int16 int16
Int32 int32
Int64 int64
Uint8 uint8
Uint16 uint16
Uint32 uint32
Uint64 uint64
}
data := Data{
Int8: 127,
Int16: 32767,
Int32: 2147483647,
Int64: 9223372036854775807,
Uint8: 255,
Uint16: 65535,
Uint32: 4294967295,
Uint64: 18446744073709551615,
}
rfx := New(&data)
rfx.Set("Int8", nil)
rfx.Set("Int16", nil)
rfx.Set("Int32", nil)
rfx.Set("Int64", nil)
rfx.Set("Uint8", nil)
rfx.Set("Uint16", nil)
rfx.Set("Uint32", nil)
rfx.Set("Uint64", nil)
if data.Int8 != 0 {
t.Errorf("Expected Int8 to be 0, got %d", data.Int8)
}
if data.Int16 != 0 {
t.Errorf("Expected Int16 to be 0, got %d", data.Int16)
}
if data.Int32 != 0 {
t.Errorf("Expected Int32 to be 0, got %d", data.Int32)
}
if data.Int64 != 0 {
t.Errorf("Expected Int64 to be 0, got %d", data.Int64)
}
if data.Uint8 != 0 {
t.Errorf("Expected Uint8 to be 0, got %d", data.Uint8)
}
if data.Uint16 != 0 {
t.Errorf("Expected Uint16 to be 0, got %d", data.Uint16)
}
if data.Uint32 != 0 {
t.Errorf("Expected Uint32 to be 0, got %d", data.Uint32)
}
if data.Uint64 != 0 {
t.Errorf("Expected Uint64 to be 0, got %d", data.Uint64)
}
})
t.Run("Set nil to float types", func(t *testing.T) {
type Data struct {
Float32 float32
Float64 float64
}
data := Data{
Float32: 3.14,
Float64: 2.718,
}
rfx := New(&data)
rfx.Set("Float32", nil)
rfx.Set("Float64", nil)
if data.Float32 != 0.0 {
t.Errorf("Expected Float32 to be 0.0, got %f", data.Float32)
}
if data.Float64 != 0.0 {
t.Errorf("Expected Float64 to be 0.0, got %f", data.Float64)
}
})
t.Run("Set nil to channel field", func(t *testing.T) {
type Data struct {
Chan chan int
}
ch := make(chan int)
data := Data{Chan: ch}
rfx := New(&data)
rfx.Set("Chan", nil)
if data.Chan != nil {
t.Errorf("Expected Chan to be nil, got %v", data.Chan)
}
})
t.Run("Set nil to func field", func(t *testing.T) {
type Data struct {
Func func()
}
data := Data{Func: func() {}}
rfx := New(&data)
rfx.Set("Func", nil)
if data.Func != nil {
t.Errorf("Expected Func to be nil")
}
})
t.Run("Set nil to nested struct with various types", func(t *testing.T) {
type Inner struct {
Ptr *string
Slice []int
Map map[string]string
Int int
String string
Bool bool
}
type Outer struct {
Inner Inner
}
data := Outer{
Inner: Inner{
Ptr: stringPtr("test"),
Slice: []int{1, 2, 3},
Map: map[string]string{"key": "value"},
Int: 42,
String: "hello",
Bool: true,
},
}
rfx := New(&data)
rfx.Set("Inner.Ptr", nil)
rfx.Set("Inner.Slice", nil)
rfx.Set("Inner.Map", nil)
rfx.Set("Inner.Int", nil)
rfx.Set("Inner.String", nil)
rfx.Set("Inner.Bool", nil)
if data.Inner.Ptr != nil {
t.Errorf("Expected Inner.Ptr to be nil, got %v", data.Inner.Ptr)
}
if data.Inner.Slice != nil {
t.Errorf("Expected Inner.Slice to be nil, got %v", data.Inner.Slice)
}
if data.Inner.Map != nil {
t.Errorf("Expected Inner.Map to be nil, got %v", data.Inner.Map)
}
if data.Inner.Int != 0 {
t.Errorf("Expected Inner.Int to be 0, got %d", data.Inner.Int)
}
if data.Inner.String != "" {
t.Errorf("Expected Inner.String to be empty, got %s", data.Inner.String)
}
if data.Inner.Bool != false {
t.Errorf("Expected Inner.Bool to be false, got %v", data.Inner.Bool)
}
})
}
// Helper function to create string pointer
func stringPtr(s string) *string {
return &s
}