php - Laravel Eloquent Query Builder 链接影响原始基本查询

Question

我怎样才能让这个查询工作？

$basic_query = Invoices::between_days(15, 7); // This is a collection of invoices from 15 days ago, to seven days in the future. Notice I am not getting this query, it´s still just a builder instance. If you do dd($basic_query->get()) you get 100 invoices, 60 of them paid, 40 of them outstanding.

$paid_invoices = $basic_query->paid()->get(); // This returns the collection of 60 paid invoices without problems. BUT MODIFIES $basic query, if you dd($basic query->get()) at this point, you only get the 60 paid invoices, not the full 100 invoices collection. ¿?!!!

$outstanding_invoices = $basic_query->paid(false)->get(); // This query will always be empty, even though there are many outstanding invoices. If you dd($basic_query->get()) at this point, you get an empty collection. The 100 invoices are lost.

那么我怎样才能有一个基本集合作为起点，并且不会被后续的 get() 操作修改。

谢谢!

Answer 1

构建器上有一个可用的克隆方法(Illuminate\Database\Query\Builder) 可以使用的

$basic_query = Invoices::between_days(15, 7);

$paid_invoices = $basic_query->clone()->paid()->get();

$outstanding_invoices = $basic_query->clone()->paid(false)->get();

更新

对于低于 8.x 的 Laravel 版本，可以在 AppServiceProvider 或新的 MacroServiceProvider 启动方法中定义宏。

使用 MacroServiceProvider - 不要忘记将其添加到 config/app.php 中的提供者数组

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Database\Query\Builder;

class MacroServiceProvider extends ServiceProvider
{
    public function boot()
    {
        Builder::macro('clone', function() {
            return clone $this;
        });
    }

    public function register()
    {
        //
    }
}