fix FileWithLineNum func and add gormSourceDir unit test

utils/utils.go

@@ -3,6 +3,7 @@ package utils
 import (
 	"database/sql/driver"
 	"fmt"
+	"path/filepath"
 	"reflect"
 	"runtime"
 	"strconv"
@@ -14,17 +15,22 @@ var gormSourceDir string
 
 func init() {
 	_, file, _, _ := runtime.Caller(0)
-	gormSourceDir = strings.Replace(file, `utils.utils.go`, "", -1)
+	// Here is the directory to get the gorm source code. Here, the filepath.Dir mode is enough,
+	// and the filepath is compatible with various operating systems
+	gormSourceDir = filepath.Dir(filepath.Dir(file))
 }
 
+// FileWithLineNum return the file name and line number of the current file
 func FileWithLineNum() string {
-	for i := 2; i < 15; i++ {
+	for i := 1; i < 15; i++ {
 		_, file, line, ok := runtime.Caller(i)
 
+		// fmt.Println("file:", file, " line: ", line, "ok: ", ok)
 		if ok && (!strings.HasPrefix(file, gormSourceDir) || strings.HasSuffix(file, "_test.go")) {
 			return file + ":" + strconv.FormatInt(int64(line), 10)
 		}
 	}
+
 	return ""
 }
 

utils_filenum_test.go

@@ -0,0 +1,12 @@
+package gorm
+
+import (
+	"log"
+	"testing"
+
+	"gorm.io/gorm/utils"
+)
+
+func TestFileWithLineNum(t *testing.T) {
+	log.Println("FileWithLineNum: ", utils.FileWithLineNum())
+}