How to get multiple virtual field data in cakephp 3.2

Question

I want two virtual field to be merged in the fetching records.But i have done it for only one virtual field,another one is returning null.

I am quite confuse how to return two virtual field data.For one its coming fine.

Below is the codes In model/Entity/Order.php

protected $_virtual = ['due','paid'];


    protected function _getDue() {
        return $this->_properties['collection']['due_amount'];
         return $this->_properties['collection']['total_sale_amount']-$this->_properties['collection']['due_amount'];
    }

Below is the output

[
    {
          "id": 20,
          "collection": {
            "id": 150,
            "order_id": 20,
            "total_sale_amount": 110,
            "net_paid": 10,
            "due_amount": 70,
            "is_paid": 1,
            "payment_mode": "DD",
            "reference_num": "",
            "created": "2016-09-09T00:00:00+0000"
        },
        "due": 70,
        "paid": null
    }
]

Here paid is coming null,but is should come 110-70 = 40 .

if i am keeping any one instead of 2 ,i am getting what i supposed to need.

Please suggest me. any suggestion will be highly appreciated . :)

Answer 1

A mentioned in comment, you cannot write two returns in a single function.

You should use an array. put both values inside array and return an array.

 protected function _getDue() {
    $data = [];
    $data['due'] = $this->_properties['collection']['due_amount'];
    $data['paid'] = $this->_properties['collection']['total_sale_amount']-$this->_properties['collection']['due_amount'];
    return $data;
 }