laravel 5 includesToMany使用主鍵作為表

Question

我有3個表，分別稱為permissions ， processes和permission_processes 。

表格的數據如下所示：

permissions
-----------
ID  Name
--  ----
1   Blog
2   Users
...

processes
---------
ID  Name
--  ----
1   Create
2   Update
3   View
4   Delete

permission_processes
--------------------
ID  permission_id   process_id
--  -------------   ----------
1   1               1
2   1               2
3   1               3
4   1               4
5   2               1
6   2               2
...

我正在嘗試獲取所有流程的特定權限。 但是，在模型中使用關系時，它將permissions表的primary key視為表。

這是錯誤：

SQLSTATE[42S02]: Base table or view not found: 1146 Table 
'ahp.permission_id' doesn't exist (SQL: select `permission_processes`.*, 
`permission_id`.`permission_id` as `pivot_permission_id`, 
`permission_id`.`permission_process_id` as `pivot_permission_process_id` 
from `permission_processes` inner join `permission_id` on 
`permission_processes`.`permission_process_id` = permission_id`.`permission_process_id` where 
`permission_id`.`permission_id` = 0O9aynuPJtBjdYW)

以下是每個模型：

允許：

class Permission extends Model
{

    protected $table        = 'permissions';
    protected $primaryKey   = 'permission_id';
    protected $fillable     = ['permission_id', 'permission_name', 'permission_description', 'permission_slug', 'state', 'active'];

    public function permission_processes() {
        return $this->belongsToMany('\App\PermissionProcess', 'permission_id', 'permission_id');
    }

}

PermissionProcess：

class PermissionProcess extends Model
{

    protected $table        = 'permission_processes';
    protected $primaryKey   = 'permission_process_id';
    protected $fillable     = ['permission_process_id', 'permission_id', 'process_id', 'state', 'active'];

    public function process() {
        return $this->hasOne('\App\Process', 'process_id', 'process_id');
    }

    public function permission() {
        return $this->hasOne('\App\Permission', 'permission_id', 'permission_id');
    }

}

處理：

class Process extends Model
{
    protected $table        = 'processes';
    protected $primaryKey   = 'process_id';
    protected $fillable     = ['process_id', 'process_name', 'process_description', 'state', 'active'];

    public function permission_processes() {
        return $this->belongsToMany('\App\PermissionProcess', 'process_id', 'process_id');
    }

}

這是我用來調用permission processes的代碼：

$all_permissions = \App\Permission::orderBy('active', 1)->get();
dd($all_permissions->first()->permission_processes);

我究竟做錯了什么？ 我所有其他使用相同流程的關系是否有效？

Answer 1

Laravel自動查找鏈接表。

您需要告訴它鏈接的另一端是什么，以便它可以猜測鏈接表中的列名。

class Permission extends Model {
    public function processes() {
        return $this->belongsToMany('\App\Permission', 'your_link_table_name', 'key_1','key_2');
    }
}

如果以后需要中間表，則可以使用$ permission-> processess-> pivot

多對多關系