I am starting out with Node. Sorry for what probably is a stupid question.
Trying to understand why the below code throws an error: ReferenceError: Promise is not defined
allAccountFixtures: ['account-customer-joe', 'account-partner-sam', 'account-partner-jane', 'account-admin-jill'],
allProductFixtures: ['product-123', 'product-234', 'product-345', 'product-456'],
...
loadBasicFixtures: (Api) => {
return Promise.all([
Support.importRecords(Api.accountsAPI, Support.allAccountFixtures),
Support.importRecords(Api.productsAPI, Support.allProductFixtures)
]);
},
My APIs are defined elsewhere as:
this.accountsAPI = app.service('/api/accounts');
this.productsAPI = app.service('/api/products');
The import function is:
importRecords: (feathersService, fixtureNames) => {
// Wrap in an array if there's only one.
if (!(fixtureNames instanceof Array)) { fixtureNames = [fixtureNames]; }
// Create a separate promise for each JSON fixture to load the JSON from a
// file and send it to feathers.create(). Don't execute yet.
var promises = fixtureNames.map(fixtureName => {
var filePath = `test/fixtures/json/${fixtureName}.json`;
// console.log(`-> Loading JSON fixture: ${filePath}`);
return fs.readFileAsync(filePath, 'utf8')
.then((jsonString) => {
return JSON.parse(jsonString);
}).then((json) => {
return feathersService.create(json);
});
});
// Wrap all fixture loading promises inside a single outer promise that will
// fire when all of the child promises are plete.
return Promise.all(promises);
},
Don't know whether the supplied information is sufficient to advise what is happening. I looked up the concept of a "promise" and that's pretty much it. Perhaps you could point to the right direction. The documentation mentions resolve and reject.
I am starting out with Node. Sorry for what probably is a stupid question.
Trying to understand why the below code throws an error: ReferenceError: Promise is not defined
allAccountFixtures: ['account-customer-joe', 'account-partner-sam', 'account-partner-jane', 'account-admin-jill'],
allProductFixtures: ['product-123', 'product-234', 'product-345', 'product-456'],
...
loadBasicFixtures: (Api) => {
return Promise.all([
Support.importRecords(Api.accountsAPI, Support.allAccountFixtures),
Support.importRecords(Api.productsAPI, Support.allProductFixtures)
]);
},
My APIs are defined elsewhere as:
this.accountsAPI = app.service('/api/accounts');
this.productsAPI = app.service('/api/products');
The import function is:
importRecords: (feathersService, fixtureNames) => {
// Wrap in an array if there's only one.
if (!(fixtureNames instanceof Array)) { fixtureNames = [fixtureNames]; }
// Create a separate promise for each JSON fixture to load the JSON from a
// file and send it to feathers.create(). Don't execute yet.
var promises = fixtureNames.map(fixtureName => {
var filePath = `test/fixtures/json/${fixtureName}.json`;
// console.log(`-> Loading JSON fixture: ${filePath}`);
return fs.readFileAsync(filePath, 'utf8')
.then((jsonString) => {
return JSON.parse(jsonString);
}).then((json) => {
return feathersService.create(json);
});
});
// Wrap all fixture loading promises inside a single outer promise that will
// fire when all of the child promises are plete.
return Promise.all(promises);
},
Don't know whether the supplied information is sufficient to advise what is happening. I looked up the concept of a "promise" and that's pretty much it. Perhaps you could point to the right direction. The documentation mentions resolve and reject.
Share Improve this question asked Dec 5, 2015 at 16:34 Moshe ShmuklerMoshe Shmukler 1,3002 gold badges21 silver badges45 bronze badges 2-
What version of node.js are you running? Any more recent 4.x version will have
Promise
already built-in. – jfriend00 Commented Dec 5, 2015 at 16:59 - you are right. I installed nvm and changed whatever I had to 4.2.1 – Moshe Shmukler Commented Dec 5, 2015 at 18:26
2 Answers
Reset to default 5I'll make my ment into an answer since it solved your issue.
Some older versions of node.js do not have promises built-in and to use promises with them requires loading a third party library that adds promise support.
If you upgrade to any 4.x version of node.js or newer, you will have promises built-in to node.js.
You need to import and require Promise
npm install promise --save
Then
var Promise = require('promise');