[SOLVED] PHP Laravel Sage One API says invoice lines are required when they are there and not empty

PHP Laravel Sage One API says invoice lines are required when they are there and not empty

I am currently integrating an application with the Sage One API and am having a problem. The API says that invoice lines may not be empty, but the data is there. What am I doing wrong?

Here is my method of getting the line items:

$lineItems = [];
    foreach ($invoiceItems as $invoiceItem){
      $lineItems[] =
        [
          "SelectionId" => "35175771",
          "TaxTypeId" => "6194291",
          "Description" => $invoiceItem->name,
          "Quantity" => $invoiceItem->duration,
          "UnitPriceExclusive" => $invoiceItem->total_excl_vat
        ];
    }

    foreach ($invoiceOtherItems as $invoiceOtherItem){
      $lineItems[] =
        [
           "SelectionId" => "35175771",
          "TaxTypeId" => "6194291",
          "Description" => $invoiceOtherItem->otherItem->name,
          "Quantity" => $invoiceOtherItem->quantity,
          "UnitPriceExclusive" => $invoiceOtherItem->total_excl_vat
        ];
    }

//dd($lineItems)

And here is the part in the post data to the API where I post the invoice items (removed majority items for the sake of brevity here):

$invoice = [
      "Date" => Carbon::now()->toDateString(),
      "Lines" => $lineItems,
      "DueDate" => "2021-08-29"
    ];

Performing a dump and die where I commented the dd returns all the arrays, yet the API is telling me lines are required. Am I doing anything wrong? The code seems correct to me and I can't find anything to help on this matter.

Solution

For anyone that might run across this problem here is the solution:

In your response, define your headers like this:

'headers' => ['Content-Type' => 'application/json', 'Accept' => 'application/json']

And do not use form_params, but use this instead:

'body' => json_encode($invoice)