Laravel 和雄辩合集

Posted 2023-03-14

【中文标题】Laravel 和雄辩合集

【英文标题】：Laravel sum eloquent collection

【发布时间】：2015-03-04 09:50:30

【问题描述】：

我如何对已预先加载的数据集求和？

这是我的表结构：

regions table
+------------+------------------+------+-----+---------------------+----------------+
| Field      | Type             | Null | Key | Default             | Extra          |
+------------+------------------+------+-----+---------------------+----------------+
| id         | int(10) unsigned | NO   | PRI | NULL                | auto_increment |
| region     | varchar(255)     | NO   |     | NULL                |                |
| created_at | timestamp        | NO   |     | 0000-00-00 00:00:00 |                |
| updated_at | timestamp        | NO   |     | 0000-00-00 00:00:00 |                |
+------------+------------------+------+-----+---------------------+----------------+

submits table
+------------+------------------+------+-----+---------------------+----------------+
| Field      | Type             | Null | Key | Default             | Extra          |
+------------+------------------+------+-----+---------------------+----------------+
| id         | int(10) unsigned | NO   | PRI | NULL                | auto_increment |
| region_id  | int(11)          | NO   |     | NULL                |                |
| deals      | int(11)          | NO   |     | NULL                |                |
| created_at | timestamp        | NO   |     | 0000-00-00 00:00:00 |                |
| updated_at | timestamp        | NO   |     | 0000-00-00 00:00:00 |                |
+------------+------------------+------+-----+---------------------+----------------+

这些是我的模型/关系：-

class Region extends Eloquent 

  public function submits()
  
    return $this->hasMany('Submit');
  



<?php

class Submit extends Eloquent 

  public function regions()
  
    return $this->belongsTo('Region');
  
  

这是我的控制器

  public function index()
  
    $regions = Region::with('submits')->get();

    return $regions;
    //return View::make('pages.index', compact('regions'));
  

这是返回数据的样子（json格式，我理解$regions在一个雄辩的集合中）：-

我不知道如何将“交易”的总和 (4) 发送回视图？

【参考方案1】：

$deals = $regions->sum(function ($region) 
    return $region->submits->sum('deals');
);

【参考方案2】：

你可以显示这个package

$invoices = Region::withSum('submits:deals')->get();