Implementing Promises using Bluebird - bluebird

Question

I have a function which needs to be implemented with Bluebird Promises but unable to work it out. Here is a pseudo code
exports.addEmployees=function (req,res){
var data = [
{
firstName: 'XXXXX',
lastName: 'V',
phone: '9999999999',
dateOfBirth: '2010-08-02',
department: 'IT',
startDate: '2015-08-02',
created: now,
updated: now
},
{
firstName: 'YYYYY',
lastName: 'K',
phone: '8888888888',
dateOfBirth: '2011-08-02',
department: 'IT',
startDate: '2015-08-02',
created: now,
updated: now
},
];
async.each(data, function(item,callback){
req.db.Employee.create(item, callback);
},function(err){
if(err){
res.send("Error!");
}
res.send("Success!");
}
);
}
Thanks

Answer 1

Something like
var Promise = require("bluebird")
var data = [
{
firstName: 'XXXXX',
lastName: 'V',
phone: '9999999999',
dateOfBirth: '2010-08-02',
department: 'IT',
startDate: '2015-08-02',
created: now,
updated: now
},
{
firstName: 'YYYYY',
lastName: 'K',
phone: '8888888888',
dateOfBirth: '2011-08-02',
department: 'IT',
startDate: '2015-08-02',
created: now,
updated: now
},
];
Promise.map(data, function(item) {
return req.db.Employee.create(item)
.then(function(id){ return id })
.catch(MyError, function(e) {
e.item = item;
throw e;
})
}).then(function(idList) {
res.send("Success!");
}).catch(MyError, function(e) {
console.log("Operation failed on " + e.item + ": " + e.message);
res.send("Error!");
});
You need to define myError to make this work (https://github.com/petkaantonov/bluebird/blob/master/API.md#catchfunction-errorclassfunction-predicate-function-handler---promise)
P.S. Sure, req.db.Employee.create(item) should support promises, so probably you will need to promisify it: https://github.com/petkaantonov/bluebird/blob/master/API.md#promisepromisifyallobject-target--object-options---object