laravel 4中的数据透视表插入

Question

嘿家伙即时通讯新的laravel和我试图插入我的数据透视表。我有这样的结构，我的数据库

部门表属于多个类别和相同类别，所以我有这个型号

use Illuminate\Auth\UserInterface; 
use Illuminate\Auth\Reminders\RemindableInterface; 

class Departments extends Eloquent { 

/** 
* The database table used by the model. 
* 
* @var string 
*/ 
protected $table = 'departments'; 

protected $fillable = ['department_name']; 

public $timestamps = false; 

/** 
* The attributes excluded from the model's JSON form. 
* 
* @var array 
*/ 
public function categories() 
{ 
    return $this->belongsToMany('Categories'); 
    } 
    } 


    use Illuminate\Auth\UserInterface; 
    use Illuminate\Auth\Reminders\RemindableInterface; 

    class Categories extends Eloquent { 

/** 
* The database table used by the model. 
* 
* @var string 
*/ 
protected $table = 'categories'; 

protected $fillable = ['name']; 

public $timestamps = false; 

/** 
* The attributes excluded from the model's JSON form. 
* 
* @var array 
*/ 

public function department() 
{ 
    return $this->belongsToMany('Departments'); 
} 

} 

然后我有这样

在我的控制器查询

$messages = array(
     'required' => 'Please Fill the required field', 
     'unique' => 'Name Already exist' 
    ); 

    $catName = Input::get('categoryName'); 
    $deptId = Input::get('deptId'); 

    $validation = Validator::make(Input::all(),[ 
     'categoryName' => 'required|unique:categories,name' ], $messages); 

    if($validation->fails()){ 
     return array('error' =>$validation->messages()->all()); 
    }else{ 

     $findDepartment = Departments::find($deptId); 

     $saveCat = $findDepartment->categories()->insert(array('name' => $catName)); 

} 

但是当我检查表时，它加在分类表上，但没有在category_department中添加。我想念任何代码吗？还有我上次尝试迁移我的数据透视表时出错，错误是这样的。

你能帮助我在我缺少什么人？ tnx的高级帮助。

Answer 1

首先，您应该将您的模型类命名为单数：Category，Department。

然后尝试与数据透视表的名称声明你的人际关系：

public function categories() 
{ 
    return $this->belongsToMany('Category', 'category_department'); 
} 

和

public function departments() 
{ 
    return $this->belongsToMany('Departments', 'category_department'); 
} 

现在，插入新的数据，尽量附上：

$findDepartment = Department::find($deptId); 

$category = Category::where('name', '=', $catName)->first(); 

$saveCat = $findDepartment->categories()->attach($category->id);