Reputation: 39
How to stop nodeJS to execute statements written outside for loop till for loop is completed?
for(i=0;i<=countFromRequest;i++)
{
REQUEST TO MODEL => then getting result here (its an object)
licensesArray.push(obj.key);
}
res.status(200).send({info:"Done Releasing Bulk Licenses!!!",licensesArray:licensesArray})
The problem is that the statement after For Loop is being executed before For loop, so the licensesArray is empty when i receive the API Data.
Any clue how to do that?
Will be thankful to you.
Upvotes: 1
Views: 47
Reputation: 5456
Using async/await:
const licensesArray = [];
for(let i = 0; i <= countFromRequest; i++) {
const obj = await requestModel(); // wait for model and get resolved value
licensesArray.push(obj.key);
}
res.status(200).send({licensesArray});
Using Promise.all
:
const pArr = [];
const licensesArray = [];
for(let i = 0; i <= countFromRequest; i++) {
pArr.push(requestModel().then(obj => {
licensesArray.push(obj.key);
}));
}
Promise.all(pArr).then(() => { // wait for all promises to resolve
res.status(200).send({licensesArray});
});
I would go with async/await if your environment supports it, as it makes things easier to read and lets you program with a synchronous mindset (under the hood it's still asynchronous). If your environment does not support it, you can go with the Promise.all
approach.
Further reading:
Upvotes: 1