Fixed null pointer exception for anonymous user

models/dataset.go

@@ -225,7 +225,7 @@ func GetOwnerDatasetByID(id int64, user *User) (*Dataset, error) {
 	if !dataset.IsPrivate() {
 		return dataset, nil
 	}
-	if dataset.IsPrivate() && user.ID == dataset.UserID {
+	if dataset.IsPrivate() && user != nil && user.ID == dataset.UserID {
 		return dataset, nil
 	}
 	return nil, errors.New("dataset not fount")

routers/dataset/dataset.go

@@ -160,7 +160,7 @@ func Show(ctx *context.Context) {
 	user := ctx.User
 	dataset, err := models.GetOwnerDatasetByID(ctx.ParamsInt64((":id")), user)
 	if err != nil {
-		ctx.ServerError("GetDataset", err)
+		ctx.NotFound("GetDataset", err)
 		return
 	}
 
@@ -185,9 +185,10 @@ func EditDataset(ctx *context.Context) {
 	repo.RenderAttachmentSettings(ctx)
 	rel, err := models.GetOwnerDatasetByID(ctx.ParamsInt64(":id"), ctx.User)
 	if err != nil {
-		ctx.ServerError("GetDataset", err)
+		ctx.NotFound("GetDataset", err)
 		return
 	}
+
 	ctx.Data["ID"] = rel.ID
 	ctx.Data["title"] = rel.Title
 	ctx.Data["private"] = rel.IsPrivate()