通过Express中的中间件传递猫鼬对象

Question

我已经建立了一个基本的记录器Mongoose DB对象，我希望该对象通过真实的中间件并随着应用程序的进展或特定条件进行更新/编辑。

记录器中间件。

function Logger(req, res, next) {
  Logs.findOne({ip:func.GIP(req)},function (err, log){
    if (err) console.log(err);
    if (!log) { 
        var log = new Logs({ip: func.GIP(req), user: "anonymous"});
            log.attempts = 1;
            log.save();
            next();
    }
    if (log.attempts > config.attempts) {
        return res.status(403).send({ 
            success: false 
        });
    }
    if (log.attempts <= config.attempts){
        log.attempts += 1;
        log.save();
        next();
    } 
  });
}

我的示例路线。

app.post("/example", Logger, function(req,res) {
    if(!condition){ 
        log.attempts = 0;
        log.save();
    }
});

我如何能够访问如上所述的log.save()对象，而无需再次运行Logs.findOne({ip:f...函数？

Answer 1

只需将log变量添加到您的req对象中：

function Logger(req, res, next) {
  Logs.findOne({ip:func.GIP(req)},function (err, log){
    if (err) console.log(err);
    if (!log) { 
        var log = new Logs({ip: func.GIP(req), user: "anonymous"});
            log.attempts = 1;
            log.save();
            req.log = log;
            next();
    }
    if (log.attempts > config.attempts) {
        return res.status(403).send({ 
            success: false 
        });
    }
    if (log.attempts <= config.attempts){
        log.attempts += 1;
        log.save();
        req.log = log;
        next();
    } 
  });
}

这样，您可以像这样访问它：

app.post("/example", Logger, function(req,res) {
    if(!condition){ 
        req.log.attempts = 0;
        req.log.save();
    }
});