limit the max and min value of amount

pkg/errs/global.go

@@ -28,10 +28,18 @@ func GetParameterMustLessThanMessage(field string, param string) string {
 	return fmt.Sprintf("parameter \"%s\" must be less than %s", field, param)
 }
 
+func GetParameterMustLessThanCharsMessage(field string, param string) string {
+	return fmt.Sprintf("parameter \"%s\" must be less than %s characters", field, param)
+}
+
 func GetParameterMustMoreThanMessage(field string, param string) string {
 	return fmt.Sprintf("parameter \"%s\" must be more than %s", field, param)
 }
 
+func GetParameterMustMoreThanCharsMessage(field string, param string) string {
+	return fmt.Sprintf("parameter \"%s\" must be more than %s characters", field, param)
+}
+
 func GetParameterLengthNotEqualMessage(field string, param string) string {
 	return fmt.Sprintf("parameter \"%s\" length is not equal to %s", field, param)
 }

pkg/models/transaction.go

@@ -34,8 +34,8 @@ type TransactionCreateRequest struct {
 	Time                 int64           `json:"time" binding:"required,min=1"`
 	SourceAccountId      int64           `json:"sourceAccountId,string" binding:"required,min=1"`
 	DestinationAccountId int64           `json:"destinationAccountId,string" binding:"required,min=1"`
-	SourceAmount         int64           `json:"sourceAmount"`
-	DestinationAmount    int64           `json:"destinationAmount"`
+	SourceAmount         int64           `json:"sourceAmount" binding:"min=-99999999999,max=99999999999"`
+	DestinationAmount    int64           `json:"destinationAmount" binding:"min=-99999999999,max=99999999999"`
 	TagIds               []int64         `json:"tagIds,string"`
 	Comment              string          `json:"comment" binding:"max=255"`
 }
@@ -46,8 +46,8 @@ type TransactionModifyRequest struct {
 	Time                 int64   `json:"time" binding:"required,min=1"`
 	SourceAccountId      int64   `json:"sourceAccountId,string" binding:"required,min=1"`
 	DestinationAccountId int64   `json:"destinationAccountId,string" binding:"required,min=1"`
-	SourceAmount         int64   `json:"sourceAmount"`
-	DestinationAmount    int64   `json:"destinationAmount"`
+	SourceAmount         int64   `json:"sourceAmount" binding:"min=-99999999999,max=99999999999"`
+	DestinationAmount    int64   `json:"destinationAmount" binding:"min=-99999999999,max=99999999999"`
 	TagIds               []int64 `json:"tagIds,string"`
 	Comment              string  `json:"comment" binding:"max=255"`
 }

pkg/utils/api.go

@@ -2,6 +2,7 @@ package utils
 
 import (
 	"net/http"
+	"reflect"
 
 	"github.com/gin-gonic/gin"
 	"github.com/go-playground/validator/v10"
@@ -13,7 +14,7 @@ import (
 func PrintSuccessResult(c *core.Context, result interface{}) {
 	c.JSON(http.StatusOK, gin.H{
 		"success": true,
-		"result": result,
+		"result":  result,
 	})
 }
 
@@ -34,10 +35,10 @@ func PrintErrorResult(c *core.Context, err *errs.Error) {
 	}
 
 	c.AbortWithStatusJSON(err.HttpStatusCode, gin.H{
-		"success": false,
-		"errorCode": err.Code(),
+		"success":      false,
+		"errorCode":    err.Code(),
 		"errorMessage": errorMessage,
-		"path": c.Request.URL.Path,
+		"path":         c.Request.URL.Path,
 	})
 }
 
@@ -48,9 +49,17 @@ func getValidationErrorText(err validator.FieldError) string {
 	case "required":
 		return errs.GetParameterIsRequiredMessage(fieldName)
 	case "max":
-		return errs.GetParameterMustLessThanMessage(fieldName, err.Param())
+		if isIntegerParameter(err.Kind()) {
+			return errs.GetParameterMustLessThanMessage(fieldName, err.Param())
+		} else if isStringParameter(err.Kind()) {
+			return errs.GetParameterMustLessThanCharsMessage(fieldName, err.Param())
+		}
 	case "min":
-		return errs.GetParameterMustMoreThanMessage(fieldName, err.Param())
+		if isIntegerParameter(err.Kind()) {
+			return errs.GetParameterMustMoreThanMessage(fieldName, err.Param())
+		} else if isStringParameter(err.Kind()) {
+			return errs.GetParameterMustMoreThanCharsMessage(fieldName, err.Param())
+		}
 	case "len":
 		return errs.GetParameterLengthNotEqualMessage(fieldName, err.Param())
 	case "notBlank":
@@ -67,3 +76,16 @@ func getValidationErrorText(err validator.FieldError) string {
 
 	return errs.GetParameterInvalidMessage(fieldName)
 }
+
+func isIntegerParameter(kind reflect.Kind) bool {
+	switch kind {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return true
+	default:
+		return false
+	}
+}
+
+func isStringParameter(kind reflect.Kind) bool {
+	return kind == reflect.String
+}