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Home Backend Development PHP Tutorial Laravel Repositories

Laravel Repositories

Jun 06, 2016 pm 08:25 PM
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laravelRepositories存在的好处是什么,在laravel4中存在着这个文件夹,在5中将这个删除掉了,然而我感觉这个的存在使应用的整个业务逻辑在model层方面展现的更为抽象,感觉是为了一点的好处使程序的请求饶了一圈,可能是我的水平还达不到能够理解其存在的思想所在,谁能阐述下其存在的优点和好处以及为什么存在?有没有必要在laravel5.中继续使用吗?

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laravelRepositories存在的好处是什么,在laravel4中存在着这个文件夹,在5中将这个删除掉了,然而我感觉这个的存在使应用的整个业务逻辑在model层方面展现的更为抽象,感觉是为了一点的好处使程序的请求饶了一圈,可能是我的水平还达不到能够理解其存在的思想所在,谁能阐述下其存在的优点和好处以及为什么存在?有没有必要在laravel5.中继续使用吗?

不止在PHP,在JAVA,.NET等都有使用这样的设计。

补充下自己的使用场景:

  1. 在 Repositories 中封装通用的分页模块。

  2. 通过依赖注入,实例化Model对象。

  3. 在 Repositories 实现复杂查询,返回controller需要的数据。

  4. Model 基本用来映射对应的表,做主外键级联更新。指定Presenter类。

在Controller 中只会对Repositories 进行调用。

自己在网上找了一篇关于这方面的文章,翻译了下,翻译的不太好。有需要的可以参考下http://segmentfault.com/a/1190000003488038?_ea=317641

  • 是不是还是该加上Repositories

  • 我最近刚学laravel不久,我发现直接在Controller里面使用数据库的操作很不好,正在找解决方案,在一个代码里发现有用Repositories,然后在laravel5.1里面已经不存在这个文件夹了,是不是还是该自己建起来,或者怎么实现数据库操作和控制器中逻辑的分离。

@ideading 你们所说的是设计模式中的 repository pattern,属于各个面向对象语言通用的实践。
Laravel 4 的时候是为了方便用户写出更好的代码,所以设计的比较拖沓。如果你觉得自己有必要继续这样,自己建类。

Taylor Otwell 一直在根据自己的代码经验对 Laravel/Laravel 这个库(也就是 Laravel 应用的默认骨架)做调整,比如从 5.0 到 5.1,为了不让用户产生错觉,把 Command 目录重命名为 Jobs,突出 Command 最佳使用场景是 Queue,因为之前大量的人用这个目录去盛放 command pattern 的内容。 Taylor 在自己的产品 Forge 中尝试使用这种设计模式的事后发现,会导致大量的重复工作,原话是 1900 个类,他觉得绝大多数产品都不需要这种模式,在控制器中处理就好。

Laravel 是一个吸收很多语言实践的框架,理解其中内容的时候,建议脱离 Laravel 甚至脱离 PHP 本身去理解。

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