I can not read a data inside an array within a function

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I can not read a data inside an array within a function

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#1 by (0 votes)

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I'm stuck a while ago with a task that I have to do. The objective was to make an api rest with an enpoint to objeter data and another to post them. So far, everything works, but now I must put a condition to that post, which depends on my function get. If the "total" is greater than the req.body.amount I should be able to post but, no. What I did was create an empty array, and push it into my total, but when I want to use it in the post function, it does not read anything ... it's empty. I have an idea of how to continue working, so the post is incomplete, but I can not move forward if I do not have my total array. what am I doing wrong? Thank you very much for your time! (other suggestions are accepted;))

This is my code: Here I get the mongo data and calculate the total, which I put into my array.

var todo = []

function getTransactions(req, res, next){
    Transaction.find()
    .then(resolve => {
        res.send(resolve)
        const a = resolve
        const total = a.map(function(element){
            return element.aumount
        })
        .reduce(function(prev, element, index, sum){
            return prev + element
        }, 0)
        todo.push(total)
        console.log('total', todo) // <-- funciona ok.
    })
    .catch(error => {
        console.log('Se produjo un error', error)
    })
}

function postDebit(req, res, next){
    const transaction =  new Transaction({
       type: req.body.type,
        aumount: req.body.aumount,
        effectiveDate : new Date()
    })
    console.log('total', todo.length) <-- devuelve []
}

javascript nodejs api express

asked by Pil 28.08.2018 в 21:43

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1 answer

How to insert several records in the same table with the same name or id How to migrate this javascript code to typescript

score 0 · Answer 1

You can try doing this

var todo = []

function getTransactions(req, res, next){
    Transaction.find()
    .then(resolve => {
            const a = resolve
            const total = a.map(function(element){
                return element.aumount
            })
            .reduce(function(prev, element, index, sum){
                return prev + element
            }, 0)
            todo.push(total)
            console.log('total', todo) // <-- funciona ok.
            // primero llenar el arreglo y después hacer la respuesta
            res.send(resolve)

    })
    .catch(error => {
        console.log('Se produjo un error', error)
    })
}

function postDebit(req, res, next){
    const transaction =  new Transaction({
       type: req.body.type,
        aumount: req.body.aumount,
        effectiveDate : new Date()
    })
    console.log('total', todo.length) <-- devuelve []
}