!124 修复公开的仓库在用户未登录状态的500错误

* 修复公开的仓库在用户未登录状态的500错误

services/context/repo.go

@@ -400,25 +400,25 @@ func repoAssignment(ctx *Context, repo *repo_model.Repository) {
 	if ctx.Doer != nil {
 		ctx.Data["AllowCreateDevcontainer"] = ctx.Doer.AllowCreateDevcontainer
 		ctx.Data["AllowCreateActRunner"] = ctx.Doer.AllowCreateActRunner
-
 	} else {
 		query := ctx.Req.URL.Query()
 		userID := query.Get("user")
-		userNum, err := strconv.ParseInt(userID, 10, 64)
-		if err != nil {
-			return
-		}
-		u, err := user_model.GetUserByID(ctx, userNum)
-		if err != nil {
-			if user_model.IsErrUserNotExist(err) {
-				ctx.Redirect(setting.AppSubURL + "/-/admin/users")
-			} else {
-				ctx.ServerError("GetUserByID", err)
+		if userID != "" {
+			userNum, err := strconv.ParseInt(userID, 10, 64)
+			if err == nil {
+				u, err := user_model.GetUserByID(ctx, userNum)
+				if err != nil {
+					if user_model.IsErrUserNotExist(err) {
+						ctx.Redirect(setting.AppSubURL + "/-/admin/users")
+					} else {
+						ctx.ServerError("GetUserByID", err)
+					}
+					return
+				}
+				ctx.Data["AllowCreateDevcontainer"] = u.AllowCreateDevcontainer
+				ctx.Data["AllowCreateActRunner"] = u.AllowCreateActRunner
 			}
-			return
 		}
-		ctx.Data["AllowCreateDevcontainer"] = u.AllowCreateDevcontainer
-		ctx.Data["AllowCreateActRunner"] = u.AllowCreateActRunner
 	}
 
 	if repo.IsMirror {