diff --git a/app/module/articles/request/articles.request.go b/app/module/articles/request/articles.request.go
index 6cc1e55..7ca403d 100644
--- a/app/module/articles/request/articles.request.go
+++ b/app/module/articles/request/articles.request.go
@@ -36,7 +36,7 @@ type ArticlesCreateRequest struct {
 	Slug              string  `json:"slug" validate:"required"`
 	Description       string  `json:"description" validate:"required"`
 	HtmlDescription   string  `json:"htmlDescription" validate:"required"`
-	CategoryIds       string  `json:"categoryIds" validate:"required"`
+	CategoryIds       string  `json:"categoryIds" validate:"omitempty"`
 	TypeId            int     `json:"typeId" validate:"required"`
 	Tags              string  `json:"tags" validate:"required"`
 	AiArticleId       *int    `json:"aiArticleId"`
@@ -71,7 +71,7 @@ type ArticlesUpdateRequest struct {
 	Slug              string  `json:"slug" validate:"required"`
 	Description       string  `json:"description" validate:"required"`
 	HtmlDescription   string  `json:"htmlDescription" validate:"required"`
-	CategoryIds       string  `json:"categoryIds" validate:"required"`
+	CategoryIds       string  `json:"categoryIds" validate:"omitempty"`
 	TypeId            int     `json:"typeId" validate:"required"`
 	Tags              string  `json:"tags" validate:"required"`
 	CreatedAt         *string `json:"createdAt"`
diff --git a/app/module/articles/service/articles.service.go b/app/module/articles/service/articles.service.go
index 82f532f..b4e77d6 100644
--- a/app/module/articles/service/articles.service.go
+++ b/app/module/articles/service/articles.service.go
@@ -336,14 +336,23 @@ func (_i *articlesService) Save(clientId *uuid.UUID, req request.ArticlesCreateR
 	}
 
 	var categoryIds []string
-	if req.CategoryIds != "" {
-		categoryIds = strings.Split(req.CategoryIds, ",")
+	if strings.TrimSpace(req.CategoryIds) != "" {
+		for _, part := range strings.Split(req.CategoryIds, ",") {
+			part = strings.TrimSpace(part)
+			if part == "" {
+				continue
+			}
+			categoryIds = append(categoryIds, part)
+		}
 	}
 
 	_i.Log.Info().Interface("categoryIds", categoryIds).Msg("")
 
 	for _, categoryId := range categoryIds {
-		categoryIdInt, _ := strconv.Atoi(categoryId)
+		categoryIdInt, parseErr := strconv.Atoi(categoryId)
+		if parseErr != nil || categoryIdInt <= 0 {
+			continue
+		}
 
 		_i.Log.Info().Interface("categoryIdUint", uint(categoryIdInt)).Msg("")