App\Ninja\Datatables\ExpenseDatatable::columns PHP Method

    public function columns()
    {
        return [['vendor_name', function ($model) {
            if ($model->vendor_public_id) {
                if (!Auth::user()->can('viewByOwner', [ENTITY_VENDOR, $model->vendor_user_id])) {
                    return $model->vendor_name;
                }
                return link_to("vendors/{$model->vendor_public_id}", $model->vendor_name)->toHtml();
            } else {
                return '';
            }
        }, !$this->hideClient], ['client_name', function ($model) {
            if ($model->client_public_id) {
                if (!Auth::user()->can('viewByOwner', [ENTITY_CLIENT, $model->client_user_id])) {
                    return Utils::getClientDisplayName($model);
                }
                return link_to("clients/{$model->client_public_id}", Utils::getClientDisplayName($model))->toHtml();
            } else {
                return '';
            }
        }, !$this->hideClient], ['expense_date', function ($model) {
            if (!Auth::user()->can('viewByOwner', [ENTITY_EXPENSE, $model->user_id])) {
                return Utils::fromSqlDate($model->expense_date);
            }
            return link_to("expenses/{$model->public_id}/edit", Utils::fromSqlDate($model->expense_date))->toHtml();
        }], ['amount', function ($model) {
            $amount = Utils::calculateTaxes($model->amount, $model->tax_rate1, $model->tax_rate2);
            $str = Utils::formatMoney($amount, $model->expense_currency_id);
            // show both the amount and the converted amount
            if ($model->exchange_rate != 1) {
                $converted = round($amount * $model->exchange_rate, 2);
                $str .= ' | ' . Utils::formatMoney($converted, $model->invoice_currency_id);
            }
            return $str;
        }], ['category', function ($model) {
            return $model->category != null ? substr($model->category, 0, 100) : '';
        }], ['public_notes', function ($model) {
            return $model->public_notes != null ? substr($model->public_notes, 0, 100) : '';
        }], ['expense_status_id', function ($model) {
            return self::getStatusLabel($model->invoice_id, $model->should_be_invoiced, $model->balance);
        }]];
    }