使用http查询字符串作为数据库对象node.js/express [英] Using http query string as a database object node.js/express

问题描述

使用node.js/express/mongodb进行实验.

Experimenting with node.js / express / mongodb.

我正在使用

http://localhost:3000/models/save?model = {"name :"等等等等}

http://localhost:3000/models/save?model={"name":"blah blah blah"}

将测试JSON对象传递到快速路由/models/save，以保存到mongodb.除了collection.insert语句会返回未定义"错误外，其他所有功能都可以正常工作.

to pass a test JSON object to the express route /models/save for saving to the mongodb. Everything works great except the collection.insert statement which returns an "undefined" error.

我认为必须是var model = req.query.model从查询字符串中提取的参数；格式不正确.有什么想法吗?

I think it must be that the parameter extracted from the query string by var model = req.query.model; is not in the correct format. Any ideas?

代码如下:

var express = require('express');
var router = express.Router();

router.get('/save', function(req, res) {

// Set our internal DB variable
var db = req.db;

var model = req.query.model;
console.log (model);

// Set our collection
var collection = db.get('models');

// Submit to the DB
collection.insert ( model, function (err, doc) {
    if (err) {
        // If it failed, return error
        res.send("There was a problem saving to the database.");
        console.log(doc);
    }
    else {
        console.log ("model saved");
        res.send("OK")
    }
});
});
module.exports = router;

推荐答案

请尝试以下操作:

var model = JSON.parse(req.query.model);

代替行

var model = req.query.model;

JSON.parse方法解析JSON字符串表示形式(在您的情况下为model请求查询参数)，并返回Javascript对象，您可以在插入过程中使用它.

JSON.parse method parses JSON string representation (which in your case is model request query parameter) and returns Javascript object which you can then use in your insert process.

我希望它能有所帮助.

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