diff --git a/condition.go b/condition.go
index 2395490..9b78223 100644
--- a/condition.go
+++ b/condition.go
@@ -4,9 +4,9 @@ import (
 	"context"
 	"encoding/json"
 	"net/http"
+	"slices"
 	"strings"
 
-	"git.nobla.cn/golang/kos/util/arrays"
 	"git.nobla.cn/golang/rest/types"
 )
 
@@ -31,7 +31,7 @@ func BuildConditions(ctx context.Context, r *http.Request, query *Query, schemas
 			return
 		}
 	}
-	if arrays.Exists(r.Method, []string{http.MethodPut, http.MethodPost}) {
+	if slices.Contains(allowMethods, r.Method) {
 		conditions := make([]*types.Condition, 0)
 		if err = json.NewDecoder(r.Body).Decode(&conditions); err != nil {
 			return
diff --git a/model.go b/model.go
index 82f92cf..4abd4db 100644
--- a/model.go
+++ b/model.go
@@ -5,13 +5,6 @@ import (
 	"encoding/csv"
 	"encoding/json"
 	"fmt"
-	"git.nobla.cn/golang/kos/util/arrays"
-	"git.nobla.cn/golang/kos/util/pool"
-	"git.nobla.cn/golang/rest/inflector"
-	"git.nobla.cn/golang/rest/types"
-	"gorm.io/gorm"
-	"gorm.io/gorm/clause"
-	"gorm.io/gorm/schema"
 	"io"
 	"mime/multipart"
 	"net/http"
@@ -19,9 +12,17 @@ import (
 	"os"
 	"path"
 	"reflect"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
+
+	"git.nobla.cn/golang/kos/util/pool"
+	"git.nobla.cn/golang/rest/inflector"
+	"git.nobla.cn/golang/rest/types"
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"gorm.io/gorm/schema"
 )
 
 type Model struct {
@@ -325,7 +326,7 @@ func (m *Model) Search(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	scenario = types.ScenarioList
-	if arrays.Exists(r.FormValue("scenario"), allowScenario) {
+	if slices.Contains(allowScenario, r.FormValue("scenario")) {
 		scenario = r.FormValue("scenario")
 	}
 	if listSchemas, err = m.schemaLookup(childCtx, m.getDB(), domainName, m.naming.ModuleName, m.naming.TableName, scenario); err != nil {
diff --git a/rest.go b/rest.go
index 96affda..ad52819 100644
--- a/rest.go
+++ b/rest.go
@@ -6,11 +6,11 @@ import (
 	"fmt"
 	"net/http"
 	"reflect"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
 
-	"git.nobla.cn/golang/kos/util/arrays"
 	"git.nobla.cn/golang/kos/util/reflection"
 	"git.nobla.cn/golang/rest/inflector"
 	"git.nobla.cn/golang/rest/types"
@@ -167,12 +167,12 @@ func fieldRule(field *schema.Field) types.Rule {
 				if ls > 1 {
 					bs := strings.Split(vs[1], ",")
 					for _, i := range bs {
-						if arrays.Exists(i, []string{types.ScenarioCreate, types.ScenarioUpdate}) {
+						if slices.Contains(requiredScenario, i) {
 							r.Required = append(r.Required, i)
 						}
 					}
 				} else {
-					r.Required = []string{types.ScenarioCreate, types.ScenarioUpdate}
+					r.Required = requiredScenario
 				}
 			case "unique":
 				r.Unique = true
@@ -257,7 +257,7 @@ func fieldAttribute(field *schema.Field) types.Attribute {
 			case "icon":
 				attr.Icon = sv
 			case "match":
-				if arrays.Exists(sv, matchEnums) {
+				if slices.Contains(matchEnums, sv) {
 					attr.Match = sv
 				}
 			case "endofnow", "end_of_now":
@@ -281,7 +281,7 @@ func fieldAttribute(field *schema.Field) types.Attribute {
 			case "readonly":
 				bs := strings.Split(sv, ",")
 				for _, i := range bs {
-					if arrays.Exists(i, []string{types.ScenarioCreate, types.ScenarioUpdate}) {
+					if slices.Contains(readonlyScenario, i) {
 						attr.Readonly = append(attr.Readonly, i)
 					}
 				}
diff --git a/types.go b/types.go
index 903f188..4d50a79 100644
--- a/types.go
+++ b/types.go
@@ -3,8 +3,10 @@ package rest
 import (
 	"context"
 	"encoding/json"
-	"gorm.io/gorm"
 	"net/http"
+
+	"git.nobla.cn/golang/rest/types"
+	"gorm.io/gorm"
 )
 
 const (
@@ -12,6 +14,13 @@ const (
 	defaultDomain   = "localhost"
 )
 
+var (
+	readonlyScenario = []string{types.ScenarioCreate, types.ScenarioUpdate}
+	requiredScenario = []string{types.ScenarioCreate, types.ScenarioUpdate}
+
+	allowMethods = []string{http.MethodPut, http.MethodPost}
+)
+
 type (
 	httpWriter struct {
 	}
diff --git a/utils.go b/utils.go
index 4a5fc30..262be11 100644
--- a/utils.go
+++ b/utils.go
@@ -1,8 +1,8 @@
 package rest
 
 import (
-	"git.nobla.cn/golang/kos/util/arrays"
 	"reflect"
+	"slices"
 	"strings"
 )
 
@@ -13,7 +13,7 @@ func hasToken(hack string, need string) bool {
 	char := []byte{',', ';'}
 	for _, c := range char {
 		if strings.IndexByte(need, c) > -1 {
-			return arrays.Exists(hack, strings.Split(need, string(c)))
+			return slices.Contains(strings.Split(need, string(c)), hack)
 		}
 	}
 	return false