Call a function on each object in an array in Node

Question

I'm trying to batch together a database update to re-populate a mongo collection. I've created an object to hold the properties needed to lookup the data from an external source, and then add it back to a MongoDb collection.

The array looks like this:

const pops = [ 
    { table: 'SFAccounts',
      label: 'Account__c', 
      createListName: 'Accounts'
    },
    { table: 'SFTimes',
      label: 'CusTime__c', 
      createListName: 'Time'
    }]

I want to then create a function that takes 'table', 'label, and 'createListName' and it does something basically like this..

async function processData(table, label, createListName) {
    // Get some info from Salesforce 
    const dataFromSF = await getMetaDataFromSalesForce(table)
    // Extract the parts I actually need
    const relevantBits = dataFromSF.filter(field => field.name === label)
    //Create a new list in the db
    const createResult = await List.create( { name: createListName, values: relevantBits } )
    return createResult
}

The end goal is to get to something like

await Promise.all(processData(pops))

Which will await all the tables being pulled and populated into the database.

await Promise.all(pops.map({ table, label, createListName } => processData(table, label, createListName))); — generalhenry
– generalhenry, Commented Apr 27, 2018 at 13:51
Call a function on each object in an array in Node - your question is how to do that? I don't see anything else — Kristianmitk
– Kristianmitk, Commented Apr 27, 2018 at 13:56

generalhenry · Accepted Answer · 2018-04-27 14:16:09Z

1

If you change the args of processData:

async function processData({table, label, createListName}) {
    // Get some info from Salesforce 
    const dataFromSF = await getMetaDataFromSalesForce(table)
    // Extract the parts I actually need
    const relevantBits = dataFromSF.filter(field => field.name === label)
    //Create a new list in the db
    const createResult = await List.create( { name: createListName, values: relevantBits } )
    return createResult
}

it's just await Promise.all(pops.map(processData));

answered Apr 27, 2018 at 14:16

generalhenry

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1 Comment

McB Over a year ago

I actually got this working finally, but hadn't thought about destructuring the object directly into the variable names, that's a great touch! Thanks!

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