enahnce(error):增强未成功完成操作的错误描述。

exceptions/unsuccessful.go

@@ -1,11 +1,130 @@
 package exceptions
 
-type UnsuccessfulOperationError struct{}
+import (
+	"strings"
+)
 
-func NewUnsuccessfulOperationError() *UnsuccessfulOperationError {
-	return &UnsuccessfulOperationError{}
+type OperationType int16
+
+const (
+	OPERATE_CREATE OperationType = iota
+	OPERATE_UPDATE
+	OPERATE_DELETE
+	OEPRATE_QUERY
+	OPERATE_CALCULATE
+	OPERATE_DB
+	OPERATE_DB_TRANSACTION
+	OPERATE_CUSTOM OperationType = 98
+	OPERATE_OTHER  OperationType = 99
+)
+
+type UnsuccessfulOperationError struct {
+	Operate     OperationType
+	Description string
+	Message     string
 }
 
-func (UnsuccessfulOperationError) Error() string {
-	return "操作不成功。"
+func NewUnsuccessfulOperationError(oeprate OperationType, describe, message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate:     oeprate,
+		Description: describe,
+		Message:     message,
+	}
+}
+
+func NewUnsuccessCreateError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OPERATE_CREATE,
+		Message: message,
+	}
+}
+
+func NewUnsuccessUpdateError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OPERATE_UPDATE,
+		Message: message,
+	}
+}
+
+func NewUnsuccessDeleteError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OPERATE_DELETE,
+		Message: message,
+	}
+}
+
+func NewUnsuccessQueryError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OEPRATE_QUERY,
+		Message: message,
+	}
+}
+
+func NewUnsuccessCalculateError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OPERATE_CALCULATE,
+		Message: message,
+	}
+}
+
+func NewUnsuccessDBError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OPERATE_DB,
+		Message: message,
+	}
+}
+
+func NewUnsuccessDBTransactionError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OPERATE_DB_TRANSACTION,
+		Message: message,
+	}
+}
+
+func NewUnsuccessCustomError(describe, message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate:     OPERATE_CUSTOM,
+		Description: describe,
+		Message:     message,
+	}
+}
+
+func NewUnsuccessOtherError(message string) *UnsuccessfulOperationError {
+	return &UnsuccessfulOperationError{
+		Operate: OPERATE_OTHER,
+		Message: message,
+	}
+}
+
+func (e UnsuccessfulOperationError) Error() string {
+	var builder strings.Builder
+	switch e.Operate {
+	case OPERATE_CREATE:
+		builder.WriteString("创建")
+	case OPERATE_UPDATE:
+		builder.WriteString("更新")
+	case OPERATE_DELETE:
+		builder.WriteString("删除")
+	case OEPRATE_QUERY:
+		builder.WriteString("查询")
+	case OPERATE_CALCULATE:
+		builder.WriteString("计算")
+	case OPERATE_DB:
+		builder.WriteString("数据库")
+	case OPERATE_DB_TRANSACTION:
+		builder.WriteString("数据库事务")
+	case OPERATE_CUSTOM:
+		builder.WriteString(e.Description)
+	case OPERATE_OTHER:
+		builder.WriteString("其他")
+	default:
+		builder.WriteString("未知")
+	}
+	builder.WriteString("操作不成功，")
+	if len(e.Message) > 0 {
+		builder.WriteString(e.Message)
+	} else {
+		builder.WriteString("未知原因")
+	}
+	return builder.String()
 }