表结构如下:
<code>表名:projects 字段:id, name 表名:projects_services(1 project_id M service_id) 字段:project_id, service_id 表名:services 字段:id, name 表名:services_modules(M service_id N module_id) 字段:service_id, module_id 表名:modules 字段:id, name 表名:modules_scripts(1 module_id1 script_id) 字段:module_id, script_id 表名:scripts 字段:id, name</code>
如果我想利用laravel的eloquent查询如下信息,应该如何实现呢?
script_id, script_name, module_name, service_name, project_name
回复内容:
表结构如下:
<code>表名:projects 字段:id, name 表名:projects_services(1 project_id M service_id) 字段:project_id, service_id 表名:services 字段:id, name 表名:services_modules(M service_id N module_id) 字段:service_id, module_id 表名:modules 字段:id, name 表名:modules_scripts(1 module_id1 script_id) 字段:module_id, script_id 表名:scripts 字段:id, name</code>
如果我想利用laravel的eloquent查询如下信息,应该如何实现呢?
script_id, script_name, module_name, service_name, project_name
可以实现的,而且laravel会实现的非常优雅, 你这里是projects->project_services->services->services_modules->modules->modules_scripts->scriputs
,七表联合查询,你首先要把这七个模型创建好,并且要定义好各自得关联关系,然后:$list =Projects::with('project_services.services.services_modules.modules.modules_scripts.scripts')->where('写上你的条件')-first(); 只需要这么简短的一句代码,就可以实现你的需求,就能非常方便的获取你所要的数据 project_name:$list->name, service_name:$list->project_services->services->name; module_name:$list->project_services->services->services_modules->modules->name; sript_name:$list->project_services->services->services_modules->modules->modules_scripts->scripts->name; sript_id:$list->project_services->services->services_modules->modules->modules_scripts->scripts->id;
这种方法我用的较多,非常的方便,但是像这么长的连接查询,我还没有用过。
一楼已经说的不错
先在laravel eloquent定义这几个表的关系,文档地址:http://laravel.com/docs/5.1/eloquent-relationships
然后可以直接在controller中,使用Projects::with(...你需要的内容)就可以了。

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