diff --git a/actions/common/postmeta.go b/actions/common/postmeta.go
index 17cce39..7ae4011 100644
--- a/actions/common/postmeta.go
+++ b/actions/common/postmeta.go
@@ -8,7 +8,6 @@ import (
 	"github/fthvgb1/wp-go/models"
 	"github/fthvgb1/wp-go/models/wp"
 	"strconv"
-	"strings"
 	"time"
 )
 
@@ -21,29 +20,6 @@ func GetPostMetaByPostId(ctx context.Context, id uint64) (r map[string]any, err
 	return
 }
 
-func getMetaVal(key string, v any) (r any) {
-	vv, ok := v.(map[string]any)
-	if !ok {
-		return
-	}
-	k := strings.Split(key, ".")
-	if len(k) > 1 {
-		val, ok := vv[k[0]]
-		if ok {
-			vx, ok := val.(map[string]any)
-			if ok {
-				r = getMetaVal(strings.Join(k[1:], "."), vx)
-			}
-		}
-	} else {
-		x, ok := vv[k[0]]
-		if ok {
-			r = x
-		}
-	}
-	return
-}
-
 func ToPostThumbnail(c context.Context, postId uint64) (r wp.PostThumbnail) {
 	meta, err := GetPostMetaByPostId(c, postId)
 	if err == nil {
@@ -60,23 +36,20 @@ func ToPostThumbnail(c context.Context, postId uint64) (r wp.PostThumbnail) {
 							r.Path = ff
 						}
 					}
-					tt := getMetaVal("_wp_attachment_metadata.sizes.post-thumbnail", mm)
-					if tt != nil {
-						sss, ok := tt.(map[string]any)
+					tt, ok := helper.GetStrMapAnyVal[map[string]any]("_wp_attachment_metadata.sizes.post-thumbnail", mm)
+					if ok && tt != nil {
+						width, ok := tt["width"]
 						if ok {
-							width, ok := sss["width"]
+							w, ok := width.(int)
 							if ok {
-								w, ok := width.(int)
-								if ok {
-									r.Width = w
-								}
+								r.Width = w
 							}
-							height, ok := sss["height"]
+						}
+						height, ok := tt["height"]
+						if ok {
+							h, ok := height.(int)
 							if ok {
-								h, ok := height.(int)
-								if ok {
-									r.Height = h
-								}
+								r.Height = h
 							}
 						}
 					}
diff --git a/helper/function.go b/helper/function.go
new file mode 100644
index 0000000..10d369b
--- /dev/null
+++ b/helper/function.go
@@ -0,0 +1,26 @@
+package helper
+
+import "strings"
+
+func GetStrMapAnyVal[T any](key string, v map[string]any) (r T, o bool) {
+	k := strings.Split(key, ".")
+	if len(k) > 1 {
+		val, ok := v[k[0]]
+		if ok {
+			vx, ok := val.(map[string]any)
+			if ok {
+				r, o = GetStrMapAnyVal[T](strings.Join(k[1:], "."), vx)
+			}
+		}
+	} else {
+		x, ok := v[k[0]]
+		if ok {
+			vv, ok := x.(T)
+			if ok {
+				o = true
+				r = vv
+			}
+		}
+	}
+	return
+}
diff --git a/helper/function_test.go b/helper/function_test.go
new file mode 100644
index 0000000..f938a72
--- /dev/null
+++ b/helper/function_test.go
@@ -0,0 +1,48 @@
+package helper
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestGetStrMapAnyVal(t *testing.T) {
+	type args struct {
+		key string
+		v   map[string]any
+	}
+	type testCase[T any] struct {
+		name  string
+		args  args
+		wantR T
+		wantO bool
+	}
+	tests := []testCase[int]{
+		{name: "t1", args: args{
+			key: "k1",
+			v: map[string]any{
+				"k1": 1,
+				"k2": 2,
+			},
+		}, wantR: 1, wantO: true},
+		{name: "t2", args: args{
+			key: "k2.kk",
+			v: map[string]any{
+				"k1": 1,
+				"k2": map[string]any{
+					"kk": 10,
+				},
+			},
+		}, wantR: 10, wantO: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotR, gotO := GetStrMapAnyVal[int](tt.args.key, tt.args.v)
+			if !reflect.DeepEqual(gotR, tt.wantR) {
+				t.Errorf("GetStrMapAnyVal() gotR = %v, want %v", gotR, tt.wantR)
+			}
+			if gotO != tt.wantO {
+				t.Errorf("GetStrMapAnyVal() gotO = %v, want %v", gotO, tt.wantO)
+			}
+		})
+	}
+}