CODEWITHSUNDEEP
javascriptjson
Evan R
Evan R

Reputation: 51

Loop through and sum multiple JSON values

I am trying to loop through the below JSON data, extract the total_price field, sum it, then add the amount field, found in refunds[<i>].transactions array. As mentioned below I'm able to grab the total_price fields and sum, however am lost on how to also grab and sum the refund amount fields, which will be used to subtract from the total_price sum.

JSON:

{
"sales_mtd": {
"orders": [
{
"created_at": "2021-06-25T16:30:47-04:00",
"fulfillment_status": null,
"name": "#1099",
"refunds": [
{
"admin_graphql_api_id": "gid://shopify/Refund/800483278870",
"created_at": "2021-06-25T19:18:05-04:00",
"duties": [],
"id": 800483278870,
"note": "",
"order_adjustments": [],
"order_id": 4071975550998,
"processed_at": "2021-06-25T19:18:05-04:00",
"refund_line_items": [],
"restock": true,
"total_duties_set": {
"presentment_money": {
"amount": "0.00",
"currency_code": "CAD"
},
"shop_money": {
"amount": "0.00",
"currency_code": "CAD"
}
},
"transactions": [
{
"admin_graphql_api_id": "gid://shopify/OrderTransaction/5016768315414",
"amount": "75.71",
"authorization": null,
"created_at": "2021-06-25T19:18:05-04:00",
"currency": "CAD",
"device_id": null,
"error_code": null,
"gateway": "manual",
"id": 5016768315414,
"kind": "refund",
"location_id": null,
"message": "Refunded 75.71 from manual gateway",
"order_id": 4071975550998,
"parent_id": 5015934074902,
"processed_at": "2021-06-25T19:18:05-04:00",
"receipt": {},
"source_name": "1830279",
"status": "success",
"test": false,
"user_id": 64086245398
}
],
"user_id": 64086245398
}
],
"total_price": "75.71"
},

I used this code to loop through the total_price fields and sum them, thanks to help in another question.

let sumReduce = json.sales_mtd.orders.reduce((acc, curr) => acc + Number(curr.total_price), 0);
console.log(sumReduce);

However, when I try and repurpose this to also grab and sum the refund amounts, I either get NaN or an error message unable to read the transaction or other field. I have tried reviewing MDN docs, starting from a less complex object, repurposing other answers but can't quite seem to get it. Any input is very much appreciated.

Thank you

Upvotes: 1

Views: 295

Answers (2)

Snirka
Snirka

Reputation: 598

Try the following:

let sumReduce1 =  json.sales_mtd.orders.reduce((acc, order) => {
  if(order.refunds.length !== 0) {
    return acc + Number(order.refunds[0].transactions[0].amount);
  } else {
    return acc;
  }
}, 0);

let sumReduce2 =  json.sales_mtd.orders.reduce((acc, order) => {
  if(order.refunds.length !== 0) {
    return order.refunds.reduce((acc1, refund) => {
      return refund.transactions.reduce((acc2, transaction) => acc2 + Number(transaction.amount), acc1);
    }, acc);
  } else {
    return acc;
  }
}, 0);

sumReduce1 and sumReduce2 do the same thing for the JSON object you provide only that sumReduce2 take into consideration that you can have multiple orders, refunds and transactions. sumReduce1 is more of a hard coded function, I would advise using sumReduce2.

Upvotes: 1

Csaba Balogh
Csaba Balogh

Reputation: 26

It looks like to me "transactions" is only available within the refunds array, and sometimes it is empty.

something like if(refunds.length) will do the job

Upvotes: 1

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