更换为null_time,null_int

server/core/null_int.go

@@ -0,0 +1,122 @@
+package core
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"strconv"
+)
+
+// int类型别名，支持前端传递null，int，string类型
+// 忽略前端null值，接收""值时，返回0
+type NullInt struct {
+	Int   *int64
+	Valid bool
+}
+
+func EncodeInt(value any) any {
+	switch v := value.(type) {
+	case map[string]any:
+		if v["Int"] != nil {
+			return v["Int"]
+		}
+	}
+	return ""
+}
+func DecodeInt(value any) (any, error) {
+	switch v := value.(type) {
+	case int:
+		i := int64(v)
+		return NullInt{Int: &i, Valid: true}, nil
+	case int64:
+		return NullInt{Int: &v, Valid: true}, nil
+	case string:
+		if v == "" {
+			return NullInt{Int: nil, Valid: false}, nil
+		}
+		i, err := strconv.ParseInt(v, 10, 64)
+		return NullInt{Int: &i, Valid: true}, err
+	case nil:
+		return NullInt{Int: nil, Valid: false}, nil
+	case NullInt:
+		return v, nil
+	}
+	return NullInt{Int: nil, Valid: false}, nil
+}
+
+// gorm实现Scanner
+func (i *NullInt) Scan(value interface{}) error {
+	i.Valid = false
+	if value == nil {
+		return nil
+	}
+	v := value.(int64)
+	i.Int, i.Valid = &v, true
+	return nil
+}
+
+// gorm实现 Valuer
+func (i NullInt) Value() (driver.Value, error) {
+	if !i.Valid {
+		return nil, nil
+	}
+	v := i.Int
+	if v == nil {
+		return nil, nil
+	}
+	return *v, nil
+}
+func (i NullInt) String() string {
+	if i.Valid {
+		return strconv.FormatInt(*i.Int, 10)
+	} else {
+		return ""
+	}
+}
+
+// 实现json序列化接口
+func (i NullInt) MarshalJSON() ([]byte, error) {
+	if i.Valid {
+		return json.Marshal(i.Int)
+	} else {
+		return json.Marshal(nil)
+	}
+}
+
+// 实现json反序列化接口
+func (i *NullInt) UnmarshalJSON(data []byte) error {
+	var x any
+	if err := json.Unmarshal(data, &x); err != nil {
+		return err
+	}
+	switch v := x.(type) {
+	case int64:
+		i.Int = &v
+		i.Valid = true
+		return nil
+	case float64:
+		i64 := int64(v)
+		i.Int = &i64
+		i.Valid = true
+		return nil
+	case string:
+		if v == "" {
+			i.Int = nil
+			i.Valid = true
+			return nil
+		}
+		num, err := strconv.ParseInt(v, 10, 64)
+		if err == nil {
+			i.Int = &num
+			i.Valid = true
+		} else {
+			i.Valid = false
+		}
+		return err
+	case nil:
+		i.Valid = false
+	default:
+		i.Valid = false
+	}
+
+	return nil
+}