Page 68 - Nodejs 교과서 개정2판

খী awaitਸ ࠢ৓णפ׮ ੉ઁ ೣࣻח ೧׼ ೐۽޷झо resolveؼ ٸө૑ ӝ׮ܽ ٍ ׮਺ ۽૒ਵ۽ ֈযцפ׮

৘ܳ ٜݶ await Users.findOne({})੉ resolveؼ ٸө૑ ӝ׮ܽ ׮਺ী user ߸ࣻܳ ୡӝചೞח Ѫੑפ׮

ਤ ௏٘ח ী۞ܳ ୊ܻೞח ࠗ࠙ ೐۽޷झо rejectػ ҃਋ ੉ হਵ޲۽ ׮਺җ э਷ ୶о ੘স੉ ೙ਃ೤פ׮

async function findAndSaveUser(Users) {
try {
let user = await Users.findOne({});
user.name = 'zero';
user = await user.save();
user = await Users.findOne({ gender: 'm' });
// 생략
} catch (error) {
console.error(error);
}
}

try/catchޙਵ۽ ۽૒ਸ хसणפ׮ ೐۽޷झ੄ catch ݫࢲ٘୊ۢ try/catchޙ੄ catchо ী۞ܳ ୊ܻ೤פ

׮

ച࢓಴ ೣࣻب BTZOD৬ э੉ ࢎਊೡ ࣻ ੓णפ׮

const findAndSaveUser = async (Users) => {
try {
let user = await Users.findOne({});
user.name = 'zero';
user = await user.save();
user = await Users.findOne({ gender: 'm' });
// 생략
} catch (error) {
console.error(error);
}
};.

forޙҗ async awaitਸ э੉ ॄࢲ ೐۽޷झܳ ࣽର੸ਵ۽ प೯ೡ ࣻ ੓णפ׮ forޙҗ ೣԋ ॳח Ѫ਷ ֢٘

ߡ੹ࠗఠ ૑ਗೞח &4 ޙߨੑפ׮

const promise1 = Promise.resolve('성공1');
const promise2 = Promise.resolve('성공2');