Home Backend Development PHP Tutorial laravel 关联查询问题

laravel 关联查询问题

Mar 21, 2017 pm 04:18 PM
laravel php

1.两个表,customers和contacts表
customers 客户表 有 id name address 字段
contacts 联系人表 有 id name tel qq customer_id字段
一个客户有多个联系人
2.模糊搜索天降联系人tel,列出customers表,如果用join方法会有重复的结果,laravel关联查询orm不能像tp的关联模型一样在customers结果中多一个contact数组存放符合的contacts吗?还要考虑到分页。。

更新
抱歉回复迟了,谢谢几个朋友的更新,晚上花时间使用了下面朋友的方法,首先试了下@daniel_wu魏 的方法,laravel手册上的预加载方法。
我需要搜索联系人电话号码中含有号码8的客户,客户4中联系人3和客户5联系人1、联系人2是符合条件的,目标就是查询出这个两个客户

代码如下

$list = Customer::with(['Contacts' => function ($query) use ($request) {
            if ($request->has('tel')) {
                $query->where('tel', 'like', '%' . $request->input('tel') . '%');
            }
        }])->get();
Copy after login

然后我打印出$list
打印代码如下

foreach ($list as $data) {
            echo $data->name;
            foreach ($data->contacts as $item) {
                echo '  ';
                echo $item->name;
            }
            echo &#39;<br>&#39;;
        }
Copy after login

打印结果如下

sql代码如下

select * from `customers` where `customers`.`deleted_at` is null
select * from `contacts` where `contacts`.`deleted_at` is null and `contacts`.`customer_id` in (&#39;37&#39;, &#39;38&#39;, &#39;39&#39;, &#39;40&#39;, &#39;41&#39;) and `tel` like &#39;%8%&#39;
Copy after login

可以看出不需要的客户1,2,3被查询了出来只是过滤了下符合条件的联系人。

然后来看@dawniii 的方法

       $list = Customer::whereHas(&#39;Contacts&#39;, function ($query) use ($request) {
            if ($request->has(&#39;tel&#39;)) {
                $query->where(&#39;tel&#39;, &#39;like&#39;, &#39;%&#39; . $request->input(&#39;tel&#39;) . &#39;%&#39;);
            }
        })->get();
Copy after login

得到的结果

sql代码

select * from `customers` where `customers`.`deleted_at` is null and (select count(*) from `contacts` where `contacts`.`customer_id` = `customers`.`id` and `tel` like &#39;%8%&#39; and `contacts`.`deleted_at` is null) >= 1
select * from `contacts` where `contacts`.`deleted_at` is null and `contacts`.`customer_id` = &#39;40&#39; and `contacts`.`customer_id` is not null
select * from `contacts` where `contacts`.`deleted_at` is null and `contacts`.`customer_id` = &#39;41&#39; and `contacts`.`customer_id` is not null
Copy after login

如果我的描述有问题,让大家回答有偏移,说声抱歉,
这次问题让我对laravel的orm有了很多理解,如果有什么错误,请大家指正,抛砖引玉,laravel相关的orm实战内容太少,谢谢大家热情回答。

你如果想要Customers的不重复的列表

$list = Customers::whereHas(&#39;Contacts&#39;, function($q)
{
    $q->where(&#39;tel&#39;, &#39;like&#39;, &#39;%foo%&#39;);
})->get();
Copy after login

多看看手册吧

$list =Contacts::with([&#39;Customers&#39;, function ($q) {
    // sub query
  }])->get()
Copy after login

没记错的话,应该是这样

暂时没想到比较好的办法 用一个笨办法解决了
先查出符合条件的contacts表的customer_id,distinct()去重,然后customers表whereIn()得出的customer_id

ORM並不是要取代SQL,一些較複雜的query可能還是需要直接下SQL,只是ORM讓我們有更多的武器,如單純的新增 修改 刪除就非常適合使用ORM的方式。

ORM不适合复杂的对应关系,用回db类吧

相关文章:

关于Laravel多个条件的关联查询问题 ?

Laravel 关联查询只获取管理对象的部分数据

laravel 关联查询文章和文章作者

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1662
14
PHP Tutorial
1261
29
C# Tutorial
1234
24
Laravel Introduction Example Laravel Introduction Example Apr 18, 2025 pm 12:45 PM

Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.

Solve caching issues in Craft CMS: Using wiejeben/craft-laravel-mix plug-in Solve caching issues in Craft CMS: Using wiejeben/craft-laravel-mix plug-in Apr 18, 2025 am 09:24 AM

When developing websites using CraftCMS, you often encounter resource file caching problems, especially when you frequently update CSS and JavaScript files, old versions of files may still be cached by the browser, causing users to not see the latest changes in time. This problem not only affects the user experience, but also increases the difficulty of development and debugging. Recently, I encountered similar troubles in my project, and after some exploration, I found the plugin wiejeben/craft-laravel-mix, which perfectly solved my caching problem.

Laravel user login function Laravel user login function Apr 18, 2025 pm 12:48 PM

Laravel provides a comprehensive Auth framework for implementing user login functions, including: Defining user models (Eloquent model), creating login forms (Blade template engine), writing login controllers (inheriting Auth\LoginController), verifying login requests (Auth::attempt) Redirecting after login is successful (redirect) considering security factors: hash passwords, anti-CSRF protection, rate limiting and security headers. In addition, the Auth framework also provides functions such as resetting passwords, registering and verifying emails. For details, please refer to the Laravel documentation: https://laravel.com/doc

The Continued Use of PHP: Reasons for Its Endurance The Continued Use of PHP: Reasons for Its Endurance Apr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

Laravel framework installation method Laravel framework installation method Apr 18, 2025 pm 12:54 PM

Article summary: This article provides detailed step-by-step instructions to guide readers on how to easily install the Laravel framework. Laravel is a powerful PHP framework that speeds up the development process of web applications. This tutorial covers the installation process from system requirements to configuring databases and setting up routing. By following these steps, readers can quickly and efficiently lay a solid foundation for their Laravel project.

How to learn Laravel How to learn Laravel for free How to learn Laravel How to learn Laravel for free Apr 18, 2025 pm 12:51 PM

Want to learn the Laravel framework, but suffer from no resources or economic pressure? This article provides you with free learning of Laravel, teaching you how to use resources such as online platforms, documents and community forums to lay a solid foundation for your PHP development journey from getting started to master.

How to view the version number of laravel? How to view the version number of laravel How to view the version number of laravel? How to view the version number of laravel Apr 18, 2025 pm 01:00 PM

The Laravel framework has built-in methods to easily view its version number to meet the different needs of developers. This article will explore these methods, including using the Composer command line tool, accessing .env files, or obtaining version information through PHP code. These methods are essential for maintaining and managing versioning of Laravel applications.

What versions of laravel are there? How to choose the version of laravel for beginners What versions of laravel are there? How to choose the version of laravel for beginners Apr 18, 2025 pm 01:03 PM

In the Laravel framework version selection guide for beginners, this article dives into the version differences of Laravel, designed to assist beginners in making informed choices among many versions. We will focus on the key features of each release, compare their pros and cons, and provide useful advice to help beginners choose the most suitable version of Laravel based on their skill level and project requirements. For beginners, choosing a suitable version of Laravel is crucial because it can significantly impact their learning curve and overall development experience.

See all articles