# :-: 编写Model
## 编写model
这里没有进行约束，只是正常的 CURD 操作，以及表多对多关联的关系说明。虽然只提供了基础操作，但是还是希望不要直接使用 Model在你的项目中，下面会提到用什么方式访问
### permission model
```php
namespace think\permissions\model;
use think\Model;
class Permissions extends Model
{
// 为了可控性，这里只从配置文件读取表名
public function initialize()
{
parent::initialize(); // TODO: Change the autogenerated stub
$this->name = config('permissions.table.permission');
}
public function getPermissionBy($permission_id)
{
return self::get($permission_id);
}
public function deleteBy($permission_id)
{
return $this->getPermissionBy($permission_id)->delete();
}
public function updateBy(int $id, array $data)
{
return self::where('id', $id)->update($data);
}
public function store(array $data)
{
$this->data($data);
return $this->save();
}
public function getPermissionByModuleAnd($module, $controller, $action)
{
return $this->where([
'module' => $module,
'controller' => $controller,
'action' => $action,
])->find();
}
}
```
### role model
```php
namespace think\permissions\model;
use think\Model;
class Roles extends Model
{
public function initialize()
{
parent::initialize(); // TODO: Change the autogenerated stub
$this->name = config('permissions.table.role');
}
public function permissions()
{
return $this->belongsToMany(config('permissions.model.permission'), config('permissions.table.role_has_permissions'), 'permission_id', 'role_id');
}
public function users()
{
return $this->belongsToMany(config('permissions.model.user'), 'user_has_roles', 'uid', 'role_id');
}
public function getRoleBy($role_id)
{
return $this->where('id', $role_id)->find();
}
public function getPermissions($role_id, $full = true)
{
return $full ? $this->getRoleBy($role_id)->permissions : $this->getRoleBy($role_id)->permissions()->column('permission_id');
}
public function attachPermissions($roles_id, $permissions = null)
{
return $this->getRoleBy($roles_id)->permissions()->attach($permissions);
}
public function detachPermissions($role_id, $permissions = null)
{
return $this->getRoleBy($role_id)->permissions()->detach($permissions);
}
public function detachUsers($id, $users = null)
{
return $this->getRoleBy($id)->users()->detach($users);
}
public function deleteBy($role_id)
{
return $this->getRoleBy($role_id)->delete();
}
public function updateBy($id, array $data)
{
return self::where('id', $id)->update($data);
}
public function store(array $data)
{
$this->data($data);
return $this->save();
}
}
```
