Node.js 对这个哈哈大笑。 Vacation : class Vacation { constructor(id, destination, description, attendee_creator_id) { this.id = id;
对这个哈哈大笑。Node.js 对这个哈哈大笑。 Vacation : class Vacation { constructor(id, destination, description, attendee_creator_id) { this.id = id; ,node.js,async-await,es6-promise,Node.js,Async Await,Es6 Promise,对这个哈哈大笑。 Vacation : class Vacation { constructor(id, destination, description, attendee_creator_id) { this.id = id; this.destination = destination; this.description = description; this.attendee_creator_id = attende
Vacation : class Vacation {
constructor(id, destination, description, attendee_creator_id) {
this.id = id;
this.destination = destination;
this.description = description;
this.attendee_creator_id = attendee_creator_id;
this.creator = undefined;
this.votes = undefined;
}
find_creator(pool){
return new Promise(function (resolve, reject) {
var self = this;
var query = "SELECT * FROM vacation_attendee WHERE id = " + self.attendee_creator_id;
pool.query(query, function(error, result) {
if (error) {
console.log("Error in query for vacation creator " + error);
return reject(error);
}
var creator = new attendee.VacationAttendee(result.rows[0].full_name, result.rows[0].email, result.rows[0].password_hash);
self.creator = creator;
console.log("creator found ----> " + self.creator.full_name + "in " + self.destination);
resolve(true);
});
})
}
function get_all_vacations(callback) {
var sql_vacations_query = "SELECT * FROM vacation";
pool.query(sql_vacations_query, function(error, vacations_query_result) {
if (error) {
console.log("error in vacations query " + error);
callback(error);
}
var all_complete = loop_through_vacations(vacations_query_result.rows, pool);
callback(null, all_complete);
});
}
async function loop_through_vacations(vacations_incomplete, pool) {
var all_vacations = [];
for (var vacation_data of vacations_incomplete) {
var vacation_at_index = new vac.Vacation(vacation_data.id, vacation_data.destination, vacation_data.description, vacation_data.attendee_creator_id);
vacation_at_index.find_creator(pool)
.then(()=> {
all_vacations.push(vacation_at_index);
})
.catch(error=> {
console.log(error);
});
console.log("passed vacation " + vacation_at_index.destination);
}
return await Promise.all(all_vacations);
}
async function get_all_vacations(callback){
const allComplete = await makeThatBigQuery(); // + treat data as you want
callback(null, allComplete);
}
async function loop_through_vacations(vacations_incomplete, pool) {
var all_vacations = [];
var promises = []; // store all promise
for (var vacation_data of vacations_incomplete) {
var vacation_at_index = new vac.Vacation(vacation_data.id, vacation_data.destination, vacation_data.description, vacation_data.attendee_creator_id);
promises.push( // push your promise to a store - promises
vacation_at_index.find_creator(pool)
.then(() => {
all_vacations.push(vacation_at_index)
})
.catch((err) => {
console.log(err); // Skip error???
})
);
}
await Promise.all(promises); // wait until all promises finished
return all_vacations;
}
function get_all_vacations(callback) {
var sql_vacations_query = "SELECT * FROM vacation";
pool.query(sql_vacations_query, async function(error, vacations_query_result) { // async
if (error) {
console.log("error in vacations query " + error);
return callback(error); // return to break process
}
var all_complete = await loop_through_vacations(vacations_query_result.rows, pool); // await
callback(null, all_complete);
});
}
async function get_all_vacations() {
var sql_vacations_query = "SELECT * FROM vacation";
var rows = await new Promise((resolve, reject) => {
pool.query(sql_vacations_query, function(error, vacations_query_result) {
if (error) {
console.log("error in vacations query " + error);
return reject(error);
}
resolve(vacations_query_result.rows);
});
})
var all_complete = await loop_through_vacations(rows, pool); // await
return all_complete;
}
function get_all_vacations(callback) {
var sql_vacations_query = "SELECT * FROM vacation";
pool.query(sql_vacations_query, async function(error, vacations_query_result) {
if (error) {
console.log("error in vacations query " + error);
callback(error);
}
var all_complete = await loop_through_vacations(vacations_query_result.rows, pool);
callback(null, all_complete);
});
}
async function loop_through_vacations(vacations_incomplete, pool) {
const promises = [];
for (var vacation_data of vacations_incomplete) {
var vacation_at_index = new vac.Vacation(vacation_data.id, vacation_data.destination, vacation_data.description, vacation_data.attendee_creator_id);
promises.push(vacation_at_index.find_creator(pool));
}
return await Promise.all(promises);
}