fix: make sorting of strings case insensitive

backend/internal/utils/list_request_util_test.go

@@ -0,0 +1,52 @@
+package utils
+
+import (
+	"testing"
+
+	"github.com/libtnb/sqlite"
+	"github.com/stretchr/testify/require"
+	"gorm.io/gorm"
+)
+
+func TestPaginateFilterAndSortSortsStringsCaseInsensitively(t *testing.T) {
+	type record struct {
+		ID   uint
+		Name string `sortable:"case-insensitive"`
+	}
+
+	db, err := gorm.Open(sqlite.Open("file:"+CreateSha256Hash(t.Name())+"?mode=memory&cache=shared"), &gorm.Config{})
+	require.NoError(t, err)
+	require.NoError(t, db.Exec("CREATE TABLE records (id INTEGER PRIMARY KEY, name TEXT NOT NULL)").Error)
+	require.NoError(t, db.Create(&[]record{{Name: "alpha"}, {Name: "Charlie"}, {Name: "bravo"}}).Error)
+
+	for _, test := range []struct {
+		direction string
+		expected  []string
+	}{
+		{direction: "asc", expected: []string{"alpha", "bravo", "Charlie"}},
+		{direction: "desc", expected: []string{"Charlie", "bravo", "alpha"}},
+	} {
+		t.Run(test.direction, func(t *testing.T) {
+			options := ListRequestOptions{}
+			options.Sort.Column = "name"
+			options.Sort.Direction = test.direction
+
+			var records []record
+			_, err := PaginateFilterAndSort(options, db.Model(&record{}), &records)
+			require.NoError(t, err)
+			require.Len(t, records, 3)
+			require.Equal(t, test.expected, []string{records[0].Name, records[1].Name, records[2].Name})
+		})
+	}
+}
+
+func TestExtractModelMetadataRequiresCaseInsensitiveSortMode(t *testing.T) {
+	type record struct {
+		Name  string `sortable:"case-insensitive"`
+		Event string `sortable:"true"`
+	}
+
+	meta := extractModelMetadata(&[]record{})
+	require.True(t, meta["Name"].IsCaseInsensitive)
+	require.False(t, meta["Event"].IsCaseInsensitive)
+}