README

此包包含两个 Nova 字段，用于从 Nova 客户端执行服务器端计算。用户可以选择在表单中覆盖计算值。

有关此字段的如何使用和原因的详细说明，请访问

https://codebykyle.com/blog/laravel-nova-custom-calculated-field

安装

使用 composer 安装包

composer require codebykyle/calculated-field

示例

例如

作为一个数字

作为一个字符串

默认值

Listener 字段默认将传递给它的所有数字求和

用法

<?php

use Codebykyle\CalculatedField\BroadcasterField;
use Codebykyle\CalculatedField\ListenerField;

class MyResource extends Resource
{
    public function fields(Request $request) {
        return [    
            BroadcasterField::make('Sub Total', 'sub_total'),
            BroadcasterField::make('Tax', 'tax'),
            ListenerField::make('Total Field', 'total_field')
        ];
    }
}

覆盖回调

<?php
use Codebykyle\CalculatedField\BroadcasterField;
use Codebykyle\CalculatedField\ListenerField;

class MyResource extends Resource
{
    public function fields(Request $request) {
        return [    
            BroadcasterField::make('Sub Total', 'sub_total'),
            BroadcasterField::make('Tax', 'tax'),

            ListenerField::make('Total Field', 'total_field')
                ->calculateWith(function (Collection $values) {
                    $subtotal = $values->get('sub_total');
                    $tax = $values->get('tax');
                    return $subtotal + $tax;
                }),
        ];
    }
}

字符串字段

<?php
use Codebykyle\CalculatedField\BroadcasterField;
use Codebykyle\CalculatedField\ListenerField;

class MyResource extends Resource
{
    public function fields(Request $request) {
        return [    
            BroadcasterField::make('First Name', 'first_name')
                ->setType('string'),

            BroadcasterField::make('Last Name', 'last_name')
                ->setType('string'),

            ListenerField::make('Full Name', 'full_name')
                ->calculateWith(function (Collection $values) {
                    return $values->values()->join(' ');
                }),
        ];
    }
}

多个计算字段

<?php
use Codebykyle\CalculatedField\BroadcasterField;
use Codebykyle\CalculatedField\ListenerField;

class MyResource extends Resource
{
    public function fields(Request $request) {
        return [    
            BroadcasterField::make('Sub Total', 'sub_total')
                ->broadcastTo('total'),

            BroadcasterField::make('Tax', 'tax')
                ->broadcastTo('total'),

            ListenerField::make('Total Field', 'total_field')
                ->listensTo('total')
                ->calculateWith(function (Collection $values) {
                    $subtotal = $values->get('sub_total');
                    $tax = $values->get('tax');
                    return $subtotal + $tax;
                }),


            BroadcasterField::make('Senior Discount', 'senior_discount')
                ->broadcastTo('discount'),
    
            BroadcasterField::make('Coupon Discount', 'coupon_amount')
                ->broadcastTo('discount'),
    
            ListenerField::make('Total Discount', 'total_discount')
                ->listensTo('discount')
                ->calculateWith(function (Collection $values) {
                    $seniorDiscount = $values->get('senior_discount');
                    $couponAmount = $values->get('coupon_amount');
    
                    return $seniorDiscount + $couponAmount;
                })
        ];
    }
}