标签:laravel-5-3 php laravel-5 mongodb jenssegers-mongodb
我在Laravel 5.3中使用MongoDB
库.我在MongoDB中有两个集合,我想与他们建立hasMany关系.
MongoDB的:
第一组:
雇员
{
"_id" : ObjectId("586ca8c71a72cb07a681566d"),
"employee_name" : "John",
"employee_description" : "test description",
"employee_email" : "john@email.com",
"updated_at" : "2017-01-04 11:45:20",
"created_at" : "2017-01-04 11:45:20"
},
{
"_id" : ObjectId("586ca8d31a72cb07a6815671"),
"employee_name" : "Carlos",
"employee_description" : "test description",
"employee_email" : "carlos@email.com",
"updated_at" : "2017-01-04 11:45:20",
"created_at" : "2017-01-04 11:45:20"
}
第二收藏:
任务
{
"_id" : ObjectId("586ccbcf1a72cb07a6815b04"),
"task_name" : "New Task",
"task_description" : "test description",
"task_status" : 1,
"task_created_at" : "2017-04-01 02:17:00",
"task_updated_at" : "2017-04-01 02:17:00"
},
{
"_id" : ObjectId("586cd3261a72cb07a6815c69"),
"task_name" : "2nd Task",
"task_description" : "test description",
"task_status" : 1,
"task_created_at" : "2017-04-01 02:17:00",
"task_updated_at" : "2017-04-01 02:17:00"
}
我在他们之间创建了数据透视表
Employee_Task
{
"_id" : ObjectId("586cd0cb1a72cb07a6815bf3"),
"employee_task_employee_id" : "586ca8c71a72cb07a681566d",
"employee_task_task_id" : "586ccbcf1a72cb07a6815b04",
"status" : 1
},
{
"_id" : ObjectId("586cd7851a72cb07a6815d7d"),
"employee_task_employee_id" : "586ca8c71a72cb07a681566d",
"employee_task_task_id" : "586cd3261a72cb07a6815c69",
"status" : 1
}
Laravel:
模型:
雇员:
<?php
namespace App\Models;
use Jenssegers\Mongodb\Eloquent\Model as Eloquent;
class Employee extends Eloquent {
protected $collection = 'employee';
protected $primaryKey = '_id';
public function tasks()
{
return $this->hasMany('App\Models\Task');
}
}
任务:
<?php
namespace App\Models;
use Jenssegers\Mongodb\Eloquent\Model as Eloquent;
class Task extends Eloquent {
protected $collection = 'task';
protected $primaryKey = '_id';
public function employees()
{
return $this->belongsToMany('App\Models\Employee');
}
}
控制器:
public function EmployeeData($data)
{
$employee= Employee::find('586ca8c71a72cb07a681566d')->tasks;
echo "<pre>";
print_r($employee);
}
当我想查看针对员工的任务时,它显示以下输出:
Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
)
)
我怎样才能解决这个问题?
解决方法:
在Mongo Eloquent中,当创建多对多关系时,您不需要具有数据透视表,也就是SQL心态,在Mongo-Eloquent中,多对多关系中的外键存储在数组中.
因此,模型应如下所示:
<?php namespace App\Models;
use Jenssegers\Mongodb\Eloquent\Model as Eloquent;
class Employee extends Eloquent {
protected $collection = 'employee';
protected $primaryKey = '_id';
public function tasks()
{
return $this->belongsToMany('App\Models\Task');
}
}
<?php namespace App\Models;
use Jenssegers\Mongodb\Eloquent\Model as Eloquent;
class Task extends Eloquent {
protected $collection = 'task';
protected $primaryKey = '_id';
public function employees()
{
return $this->belongsToMany('App\Models\Employee');
}
}
另外,您应该在尝试检索关系之前先加载它们
$employee= Employee::with('tasks')->find('586ca8c71a72cb07a681566d')->tasks;
您可以像在hasMany关系中一样保存关系
$employee->tasks()->save(new Task());
标签:laravel-5-3,php,laravel-5,mongodb,jenssegers-mongodb 来源: https://codeday.me/bug/20191011/1891637.html
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