fix pagintor nil

.vscode/settings.json

@@ -1,5 +1,5 @@
 {
-    "go.goroot": "/opt/go/sdk/go1",
+    "go.goroot": "/opt/go/sdk/go1.25",
     "go.toolsEnvVars": {
         "GOEXPERIMENT": "jsonv2"
     }

paginator/paginator.go

@@ -36,6 +36,10 @@ func New[T any](items []T, page int, limit int, pageCount int) *Paginator[T] {
 }
 
 func (p *Paginator[T]) Items() []T {
+	if len(p.rawTtems) == 0 {
+		return nil
+	}
+
 	// 计算起始索引和结束索引
 	startIdx := (p.curPage - 1) * p.limit
 

paginator/paginator_test.go

@@ -2,6 +2,8 @@ package paginator
 
 import (
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestCut(t *testing.T) {
@@ -12,3 +14,55 @@ func TestCut(t *testing.T) {
 	pag := New(items, page, limit, pageCount)
 	t.Logf("pag: %s", pag)
 }
+
+func TestNilItems(t *testing.T) {
+	pag := New[int](nil, 1, 10, 0)
+
+	assert.Equal(t, 0, pag.TotalCount())
+	assert.Equal(t, 0, pag.TotalPage())
+	assert.Empty(t, pag.Items())
+	assert.Equal(t, 0, pag.CurPage())
+	assert.Equal(t, 0, pag.PreviewPage())
+	assert.Equal(t, 0, pag.NextPage())
+	assert.Equal(t, 0, pag.FirstPage())
+	assert.Equal(t, 0, pag.LastPage())
+	assert.Empty(t, pag.PageRange())
+}
+
+func TestEmptyItems(t *testing.T) {
+	pag := New([]int{}, 1, 10, 0)
+
+	assert.Equal(t, 0, pag.TotalCount())
+	assert.Equal(t, 0, pag.TotalPage())
+	assert.Empty(t, pag.Items())
+	assert.Equal(t, 0, pag.CurPage())
+	assert.Equal(t, 0, pag.PreviewPage())
+	assert.Equal(t, 0, pag.NextPage())
+	assert.Equal(t, 0, pag.FirstPage())
+	assert.Equal(t, 0, pag.LastPage())
+	assert.Empty(t, pag.PageRange())
+}
+
+func TestNilItemsWithDifferentPages(t *testing.T) {
+	tests := []struct {
+		name      string
+		page      int
+		limit     int
+		pageCount int
+	}{
+		{name: "page=0,limit=1", page: 0, limit: 1, pageCount: 0},
+		{name: "page=1,limit=1", page: 1, limit: 1, pageCount: 0},
+		{name: "page=5,limit=10", page: 5, limit: 10, pageCount: 0},
+		{name: "page=1,limit=1,pageCount=3", page: 1, limit: 1, pageCount: 3},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			pag := New[string](nil, tt.page, tt.limit, tt.pageCount)
+
+			assert.Equal(t, 0, pag.TotalCount())
+			assert.Equal(t, 0, pag.TotalPage())
+			assert.Empty(t, pag.Items())
+		})
+	}
+}