[英]How to make variables accessible across multiple get requests in express? And is there a better way to code this?
我有以下獲取請求,我在其中調用一堆數據並將其傳遞到我的 EJS 視圖。
router.get('/currentrentals', ensureAuthenticated, async (req, res) => {
const companies = await Company.getCompanies();
const barges = await Barge.getBarges();
const parishes = await Parish.getParishes();
const states = await State.getStates();
const pickupdropoff = await PickupDropoff.getPickupDropoff();
var notifications = await Notification.getNotifications();
JSON.stringify(barges);
JSON.stringify(companies);
JSON.stringify(parishes);
JSON.stringify(states);
JSON.stringify(pickupdropoff);
JSON.stringify(notifications);
var notifications = await notifications.sort((a, b) => b.id - a.id).slice(0,3);
res.render('currentrentals', {
name: req.user.name, companies: companies, barges: barges, parishes: parishes, states: states, pickupdropoff : pickupdropoff, notifications : notifications
});
}
);
兩個問題:
我有多個需要相同信息的獲取請求。 有沒有辦法讓這些數據在我的整個網站上都可用,這樣我就不必為每個獲取路徑重寫它了?
有沒有更簡潔的方法來編寫我現有的代碼? 也許循環遍歷它們或類似的東西? 僅供學習之用。
該代碼目前按原樣運行。
謝謝!
如果數據不變,你可以試試這個:
let data = null;
async function getData() {
if (!data) {
data = {
companies: await Company.getCompanies(),
barges: await Barge.getBarges();
parishes: await Parish.getParishes(),
states: await State.getStates(),
pickupdropoff: await PickupDropoff.getPickupDropoff(),
notifications: (await Notification.getNotifications()).sort((a, b) => b.id - a.id).slice(0,3)
};
}
return data;
}
router.get('/currentrentals', ensureAuthenticated, async (req, res) => {
res.render('currentrentals', { name: req.user.name, ...(await getData()) });
}
);
// other routes
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