向 JSON 数组添加索引时数据表中断

Question

我有一个数据表，它从 php 数组转换为 JSON 数组填充，当我按原样从数据库中提取字段时一切正常，但我想添加一些计算字段作为最后几列，所以我在 php 中完成了它们：

foreach ($in as $id){
    $query = $link->prepare("SELECT provider_num, provider_name, 233_net_charity_care, 291_cost_of_non_mcr_bad_debts, 301_cost_of_uncomp_care
                FROM `s10`
                            WHERE `id` = :id");
    $query->bindParam(':id', $id, PDO::PARAM_INT);
    $query->execute();
    $results = $query->fetch(PDO::FETCH_ASSOC);
    if($results['301_cost_of_uncomp_care'] != 0){
                $charityPortion = ($results['233_net_charity_care'] / $results['301_cost_of_uncomp_care']);
                $baddebtPortion = ($results['291_cost_of_non_mcr_bad_debts'] / $results['301_cost_of_uncomp_care']);
                } else {
                    $charityPortion = 0;
                    $baddebtPortion = 0;
                }
    $data[] = $results;
    /*$data['charityPortion'] = $charityPortion;
    $data['baddebtPortion'] = $baddebtPortion;*/
}

然后变成一个 json 变量传递到数据表 init var tableData = <?php echo json_encode($data); ?>;

然后我用 json:

初始化数据表

$('#compTab').dataTable({
        "aaData": tableData,                               
        "aoColumns": [
            { "data": "provider_num" },
            { "data": "provider_name" },
            { "data": "233_net_charity_care" },
            { "data": "291_cost_of_non_mcr_bad_debts" },
            { "data": "301_cost_of_uncomp_care" }
            /*{ "data": "charityPortion"},
            { "data": "baddebtPortion"}*/
        ]
    });

目前我将最后两列注释掉了，因为每次我将它们添加到我的数据数组时，数据表都会报告没有找到数据，即使当我回显 [=31 时这些值显示在正确的位置=].

我的问题是：这两个变量是否遗漏了什么导致数据表出错？我有一种感觉，我可能会以某种方式将它们作为对象传递，但我认为 json_encode()

任何对此的见解都会很棒。

提前致谢

Answer 1

为什么不直接在SQL字符串中计算charityPortion和baddebtPortion？然后，它将成为 $results 的一部分：

SELECT  provider_num, provider_name, 233_net_charity_care, 
        291_cost_of_non_mcr_bad_debts, 301_cost_of_uncomp_care,
        if('301_cost_of_uncomp_care' != 0, 
            ('233_net_charity_care' / '301_cost_of_uncomp_care'), 0) As charityPortion,
        if('301_cost_of_uncomp_care' != 0, 
            ('291_cost_of_non_mcr_bad_debts' / '301_cost_of_uncomp_care'),0) As baddebtPortion
FROM `s10`
WHERE `id` = :id

向 JSON 数组添加索引时数据表中断

Datatable breaks when adding indexes to JSON array

php

arrays

datatable

jquery

json