如何将我的url参数传递给与Node.js路由分开的javascript文件中的异步函数？

Question

我正在学习编码，我正在为我的业务构建一个应用程序。我在show route上传递url参数时遇到问题。

我正在使用Node.js和MySQL。该路径显示7个不同的报告，我将每个报告分成单独的js文件，导出功能并调用show route上的函数来显示页面。问题是我对每个函数的MySQL查询都不是动态的，因为我无法访问每个单独的js文件中的url参数。

我已尝试在routes.js页面上创建一个函数，但请求未定义，因为每个req都在一个路由中声明。我也尝试在各个js文件上使用$ {req.params.id}，但req仍未定义。

这是我的节目路线：

router.get("/clients/:id/reports/monthlyreport/:marketplace/:month", function (req, res){
monthToMonth(function(arr){
    topSkuUnitsMonth(function(arr1){
        topSkuCogsMonth(function(arr2){
            productMix(function(arr3){
                ltmCogs(function(arr4){
                    topSkuCogsLTM(function(arr5){
                        topSkuUnitsLTM(function(arr6){
                            quarterComparison(function(arr7){
                                res.render("reports/show", {current: arr, math: math, units: arr1, cogs: arr2, mix: arr3, totals: arr4, yearCOGS: arr5, yearUnits: arr6, quarter: arr7});
                            })  
                        })
                    })
                })  
            })
        })  
    })
})  

});

这是monthToMonth函数：

module.exports = function monthToMonth(callback){
var q = `select 
    t1.client_id,
    DATE_FORMAT(t1.period, '%Y-%m') as period,
    ROUND(t1.shipped_COGS,0) as shipped_COGS_current_month, 
    t1.shipped_units as shipped_units_current_month,
    t1.product_title as product_title_current_month, 
    t1.asin as asin_current_month,
    ROUND(t2.shipped_COGS,0) as shipped_COGS_past_month, 
    t2.shipped_units as shipped_units_past_month, 
    t2.product_title as product_title_past_month, 
    t2.asin as asin_past_month
    from all_months_ca t1
    join all_months_ca t2 on t1.asin = t2.asin
    where t1.client_id = 1 && t2.client_id  = 1 && (t1.shipped_units > 0 || t2.shipped_units > 0) && (DATE_FORMAT(t1.period, '%Y-%m') = '2019-05' && DATE_FORMAT(t2.period, '%Y-%m') = '2019-04')
    group by t1.asin
    order by shipped_COGS_current_month DESC;`
db.query(q, function(err, foundData){
    if(err) throw err;
    callback (foundData)
})

}

MySQL查询当前在WHERE子句中有句点和client_id硬编码，但是我需要url参数来使查询动态化。如何将参数传递给这些js。文件？

Answer 1

为什么不在每个函数中传递req对象。

module.exports = function monthToMonth(req, callback){
var q = `select 
   t1.req.params.id,
   DATE_FORMAT(t1.period, '%Y-%m') as req.params.month,
   ROUND(t1.shipped_COGS,0) as shipped_COGS_current_month, 
   t1.shipped_units as shipped_units_current_month,
   t1.product_title as product_title_current_month, 
   t1.asin as asin_current_month,
   ROUND(t2.shipped_COGS,0) as shipped_COGS_past_month, 
   t2.shipped_units as shipped_units_past_month, 
   t2.product_title as product_title_past_month, 
   t2.asin as asin_past_month
   from all_months_ca t1
   join all_months_ca t2 on t1.asin = t2.asin
   where t1.client_id = 1 && t2.client_id  = 1 && (t1.shipped_units > 0 || t2.shipped_units > 0) && (DATE_FORMAT(t1.period, '%Y-%m') = '2019-05' &&    DATE_FORMAT(t2.period, '%Y-%m') = '2019-04')
   group by t1.asin
   order by shipped_COGS_current_month DESC;`
   db.query(q, function(err, foundData){
      if(err) throw err;
      callback (foundData)
   })

并调用此函数像 -

 router.get("/clients/:id/reports/monthlyreport/:marketplace/:month", function (req, res){
  monthToMonth(req, function(arr){
  // call remaining function in same way.
  topSkuUnitsMonth(req, function(arr1){
})  })