我需要简化下面的嵌套if循环代码。如何在节点js中执行。我还需要在jscript本身中进行基于用户的查询调用,而不是在ejs中进行编码。如何使用节点js在图表中显示表数据。is morris js chart与node js兼容。如果是这样的话,如何从render函数将数据从节点js对象解析成json。
var moment = require('moment');
var currencyFormatter = require('currency-formatter');
var db = require('./db.js');
const siteTitle = "SalesFlow | Luftek";
const mainURL = "http://sales.luftek.in/";
var dquery = "SELECT COUNT(*) as pending FROM enquiries WHERE status = 'Processing';";
var listdquery = "SELECT * FROM enquiries WHERE status = 'Processing';";
var listsquery = "SELECT * FROM salesorder_b WHERE po_date >= NOW()- INTERVAL 14 DAY;";
var dsquery = "SELECT count(*) as recent_order FROM salesorder_b WHERE po_date >= NOW()- INTERVAL 14 DAY";
var hitratio = "SELECT ((SELECT (SELECT count(*) FROM enquiries WHERE job_ref = (SELECT job_ref FROM salesorder_b where enquiries.job_ref = salesorder_b.job_ref) ) / (SELECT count(*) FROM enquiries))) * 100 as hitratio;";
var hitratioazeem = "SELECT ((SELECT (SELECT count(*) FROM enquiries WHERE job_ref = (SELECT job_ref FROM salesorder_b where enquiries.job_ref = salesorder_b.job_ref) & sales_per = 'Azeem' ) / (SELECT count(*) FROM enquiries where sales_per = 'Azeem'))) * 100 as hitratioazeem;";
var hitratiosuresh = "SELECT ((SELECT (SELECT count(*) FROM enquiries WHERE job_ref = (SELECT job_ref FROM salesorder_b where enquiries.job_ref = salesorder_b.job_ref) & sales_per = 'Suresh M' ) / (SELECT count(*) FROM enquiries where sales_per = 'Suresh M'))) * 100 as hitratiosuresh;";
var azeempendingenquiry = "SELECT COUNT(*) as pending FROM enquiries WHERE status = 'Processing' && sales_per = 'Azeem';";
var hitratiochart = "SELECT * FROM hitratio;";
exports.dboard = function (req, res) {
if (req.user) {
db.query(hitratio, function (err, hitresult) {
if (err) { throw err; }
else {
db.query(dsquery, function (err, result1) {
if (err) { throw err; }
else {
db.query(listdquery, function (err, plistresult) {
if (err) { throw err; }
else {
db.query(listsquery, function (err, olistresult) {
if (err) { throw err; }
else {
db.query(dquery, function (err, result) {
if (err) throw err;
else {
db.query(hitratioazeem, function (err, hitresultazeem) {
if (err) throw err;
else{
db.query(hitratiosuresh, function (err, hitresultsuresh) {
if (err) throw err;
else{
db.query(hitratiochart, function (err, hitresultchart) {
if (err) throw err;
else{
res.render('pages/dashboard', {
siteTitle: siteTitle,
moment: moment,
currencyFormatter: currencyFormatter,
pageTitle: "Dashboard",
hitresult1: hitresult[0],
hitresult2: hitresultazeem[0],
hitresult3: hitresultsuresh[0],
sales: result1[0].recent_order,
items: result[0].pending,
hititems : hitresultchart,
plists: plistresult,
olists: olistresult,
user: req.user
});
}
});
}
});
}
});
}
})
}
});
}
});
}
});
}
});
}
else { res.redirect(mainURL); }
}
1条答案
按热度按时间2nc8po8w1#
“嵌套if循环”通常被称为“回调地狱”,有各种实用程序包来处理这个问题。一个流行的是
async
,提供async.parallel
对于此特定用例:要“呈现”json,请查看express'
res.json
.“基于用户的查询调用”我不太明白你指的是什么。如果您谈论的是动态构建sql查询,我建议您使用一个包,例如
knex
.