javascript 如何在 express(node.js) 中获取路径变量
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How to get path variable in express(node.js)
提问by Qasim Khokhar
I am trying to get value of path variable "userId"using req.paramsbut i am getting undefined, if any one can guide me in this problem i ll be very thankful to him. i have place my code below.
i have go through some example but those examples are also doing in this way i don't know what is going wrong with my code.
thank you,
我正在尝试使用req.params获取路径变量“userId”的值，但我得到了undefined，如果有人可以指导我解决这个问题，我将非常感谢他。我把我的代码放在下面。我已经经历了一些例子，但这些例子也是这样做的，我不知道我的代码出了什么问题。
谢谢，
parent router for controller
控制器的父路由器
app.use("/user/:userId/group",groupController);
Action In Controller
控制器中的动作
Router.post("/", function (req, res, next) {
var group = new Group(req.body);
console.log(req.params);
group.userId = req.params.userId;
group.save(new dataCallbacks(req, res, next, "Group").insert());
});
回答by michelem
I think you are wrong with your route, you can't route to /user/:userId/groupand post to /that doesn't make sense. I mean to get userIdparam, you should post to /user/:userId/group:
我认为你的路线错了，你不能路由到/user/:userId/group和发布/是没有意义的。我的意思是要获取userId参数，您应该发布到/user/:userId/group：
Route file route.js:
路线文件route.js：
var ctrl = require('controller.js');
app.route('/user/:userId/group').post(ctrl.doIt);
Controller file controller.js:
控制器文件controller.js：
exports.doIt = function(req, res, next) {
var group = new Group(req.body);
console.log(req.params);
group.userId = req.params.userId;
group.save(new dataCallbacks(req, res, next, "Group").insert());
});
