Question

我有这样的模型

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Invoice extends Model
{
    //
     protected $table = 'event_invoice';

     public function payments(){
        return $this->hasMany('App\paymentrecieved','invoiceid');
    }

    public function comments(){
        return $this->hasMany('App\comments','invoiceid');
    }
}

现在，如果我想获得包含所有付款和评论的发票，我应该如何编写电话

我确实喜欢这个

         $invoice = Invoice::where('Id','=',$id)->payments()->comments()->get();

抛出错误

Call to undefined method Illuminate\Database\Query\Builder::payments()

谢谢＆amp;问候

Answer 1

Invoice::where(...)会返回一个构建器（Illuminate\Database\Eloquent\Builder）。 您想要的是一个模型（Illuminate\Database\Eloquent\Model），您可以通过链接->get()（或first，{{1}来获取该模型最后的方法，如paginate。只有使用此模型，您才能呼吁建立关系。

Invoice::where(...)->get()

顺便说一下，使用Invoice::where('Id', $id)->first()->payments(); // <- This is a *query builder* for payments of that invoice Invoice::where('Id', $id)->first()->payments; // <- This is the collection (array) of payments of that invoice代替find($id)更短，更易读。

如何在Laravel5中调用具有一对多关系的模型

1 个答案: