javascript - Node require()问题与2个互相需求的脚本

我有2个不同的节点脚本... save_info.js从openConections array导入sse_server.js。并且，sse_server.js从function broadcast导入save_info.js。
但是，这导致openConnections array在undefined内部成为save_info.js。为什么会这样，我该如何解决？

save_info.js：

var openConnections = require('../scripts/sse_server.js').openConnections;

function broadcast(result, event, httpObject) {
    var result = JSON.stringify(result);
    var date = new Date().getMilliseconds();
    httpObject.write('id: ' + date + '\n');
    httpObject.write('data: { \"' + event + '\":\n');
    httpObject.write('data:' + result + '\n');
    httpObject.write('data: }' + '\n\n');
}

 function db_finish(err, product, numberAffected,
                   result, event) {
    if (err) { console.log(err) }
    else {
        console.log("Db insert successfull");
        openConnections.forEach(function(httpObject) {
            broadcast(result, event, httpObject);
        });
    }
    console.log("Numer effected " + numberAffected);
}
module.exports.openConnections = openConnections;

sse_server.js：

var broadcast = require("../data/save_info").broadcast;

var openConnections = [];

    for (var model in models){
        models[model].find({}).sort({_id: -1}).limit(1).exec(
            function (err, result){
                broadcast(result, model, res);
            });
    }
 module.exports.broadcast = broadcast;

最佳答案

为了防止循环依赖性，nodejs模块加载器停止在save_info.js中加载sse_server模块。这就是openConnections未定义的原因。要解决此问题，请执行以下操作：

1）将broadcast（）移到一个单独的模块中（例如，broadcast.js）。

2）在sse_server.js和save_info.js中都放入require（'../ data / broadcast.js'）

3）在sse_server.js中删除require（'../ data / save_info'）