Node.jsExpress嵌套资源

Question

我想像下面这样嵌套资源。

/// fileA.js
app.use('/dashboards/:dashboard_id/teams', teams);
[...]

///teams.js
router.get('/', function(req, res, next) {
[...]
}

但我不能得到请求。团队中的params[“dashboard_id”]参数，因为它似乎已被参数值替换。我试图通过调用一个中间函数来传递问题，并将参数传递到某个地方，但我不知道在哪里…你有答案吗？谢谢，佛朗哥

Answer 1

您可以在此处使用＜code＞合并参数

// fileA.js
app.use('/dashboards/:dashboard_id/teams', teams);

// teams.js
const router = express.Router({ mergeParams: true })
router.get('/', function(req, res, next) {
  // you will have access to req.params.dashboard_id here
}

您还可以看到这个答案：使用ExpressRest。js嵌套路由器

Answer 2

在撰写本文时，使用 Express 4.0.0 或更高版本：

要使路由器理解带有变量的嵌套资源，您需要为每个基本路径使用app.use创建并绑定一个新路由器。

//creates a new router
var dashboardRouter = express.router();

//bind your route
dashboardRouter.get("/:dashboard_id/teams", teams);

//bind to application router
app.use('/dashboards', dashboardRouter);

这样，Express将看到路径的第一部分，并转到< code>/dashboards路线，该路线具有< code>:dashboard_id/teams路径。

Answer 3

您可以尝试以下解决方案：

//declare a function that will pass primary router's params to the request
var passPrimaryParams = function(req, res, next) {
    req.primaryParams = req.params;
    next();
}

/// fileA.js
app.use('/dashboards/:dashboard_id/teams', passPrimaryParams);
app.use('/dashboards/:dashboard_id/teams', teams);

///teams.js
router.get('/', function(req, res, next) {
    var dashboardId = req.primaryParams['dashboard_id'];  //should work now
    //here you may also use req.params -- current router's params
}