例如一个学校，学校有许多年级，年级有许多班级，班级里有许多老师，那么这种多级的多对一该怎么实现呢？
1.先设置他们的Model
学校的： School.php
[php] view plain copy PRint?<?php namespace App; use Illuminate/Database/Eloquent/Model; class schoolClass extends Model { protected $table = 'schools'; public function hasManyGrades( { return $this->hasMany('App/Grade', 'school_id', 'id'); } }年级的：Grade.php
[php] view plain copy print?<?php namespace App; use Illuminate/Database/Eloquent/Model; class Grade extends Model { protected $table = 'grades'; public function hasManyClasses() { return $this->hasMany('App/schoolClass', 'grade_id', 'id'); } }班级的：schoolSchool.php
[php] view plain copy print?<?php namespace App; use Illuminate/Database/Eloquent/Model; class schoolClass extends Model { protected $table = 'jjxiao_classes'; public function hasManyTeachers() { return $this->hasMany('App/Teacher', 'class_id', 'id'); } }老师的：Teacher.php
[php] view plain copy print?<?php namespace App; use Illuminate/Database/Eloquent/Model; class Teacher extends Model { protected $table = 'jjxiao_teacher_staffs'; } 2.控制器里面查出[php] view plain copy print?public function index(){ $id=1; $school=School::find($id); $grades=$school->hasManyGrades()->get();//找到所有的年级 foreach($grades as $g){ $classes[]=$g->hasManyClasses()->get(); //每个年级找到所对应的班级 } foreach ($classes as $cl) { foreach($cl as $c){ $teachers[]=$c->hasManyTeachers()->get(); //每个班级找到老师 } } foreach ($teachers as $te) { //给数组脱维 foreach($te as $t){ $teacher[]=$t; } } return view('home.myschool_teacher.index') ->withGrade($grades) ->withTeacher($teacher); }新闻热点
疑难解答
