Promises in Sequelize: how to get results from each promise

Question

In Sequelize >=1.7 we can use promises Can you explain for me how can i get values from each user in this code: ``` var User = sequelize.define("user", { username: Sequelize.STRING }) User .sync({ force: true }) .then(function() { return User.create({ username: 'John' }) }) .then(function(john) { return User.create({ username: 'Jane' }) }) .then(function(jane) { return User.create({ username: 'Pete' }) }) .then(function(pete) { console.log("we just created 3 users :)") console.log("this is pete:") console.log(pete.values) // what i want: console.log("this is jane:") console.log(jane.values) console.log("this is john:") console.log(john.values) }) ``` UPD All values need for set associations with other Model. Actually i need some like this code: ``` User.hasMany(Group) Group.hasMany(User) User .sync({ force: true }) .then(function() { return User.create({ username: 'John' }) }) .then(function(john) { return User.create({ username: 'Jane' }) }) .then(function(jane) { return User.create(…

Accepted Answer

The Bluebird way are the collection helper functions.

If you want to create them in parallel, use `map`:

```
User.sync({ force: true })
  .then(function() {
    return Promise.map( ['John', 'Jane', 'Pete'], function(name) {
      return User.create({ username: name });
    })
  }).spread(function(john, jane, pete) {
    console.log("we just created 3 users :)")
    console.log("this is john:")
    console.log(john.values)
    console.log("this is jane:")
    console.log(jane.values)
    console.log("this is pete:")
    console.log(pete.values)
  })
```

If you need to create them consecutively, just change it to `mapSeries` (3.0+).

If the array doesn't need to be dynamic, and you simply want to pass a shared value through the promise chain like in your example, have a look at How do I access previous promise results in a .then() chain?.

Promises in Sequelize: how to get results from each promise

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