Laravel 5.4如果用户是管理员，如何获取所有关系 [英] Laravel 5.4 How to get all relations if user is an admin

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问题描述

E.G.如果用户是管理员，则$ user-> relatedModel(不带括号)将返回整个RelatedModel集合；如果不是，则返回典型的经过过滤的集合.

E.G. $user->relatedModel (without parentheses) returns the entire RelatedModel collection if the user is an admin or the typical filtered collection if they are not.

我正在尝试更改许多用户关系，以便如果登录的用户是管理员，那么他们可以看到该关系中的所有模型，而不必每次都需要编写相同的条件，并且无需在需要此功能的每个相关模型上，为每个管理员在property_user表中创建所有关系.

I am trying to alter a number of user relationships so that if the logged in user is an admin, then they can see all models in that relationship without having to write the same conditions every time I need to use it, and without creating all the relationships in the property_user table for every admin on every related model that I need this on.

这里有一个答案，相当清楚地解释了我想要实现的目标 https://stackoverflow.com/a/34910225/1080341 这正是我在寻找的主意，只是当我在Laravel 5.4中尝试此操作时，当用户是管理员时会引发异常.

There is an answer here which explains fairly clearly what I want to achieve https://stackoverflow.com/a/34910225/1080341 which is exactly the idea I am looking for except that when I try this in Laravel 5.4 it throws an exception when the user is an admin.

Relationship method must return an object of type Illuminate\Database\Eloquent\Relations\Relation

如果用户是标准用户，则该关系将返回适当的过滤后的集合.

If the user is a standard user the relationship returns the appropriate filtered collection.

这是该答案的代码示例

public function properties()
    {
    if ($this->isAdmin()) {
        return Property::query();
    } elseif ($this->isManager() || $this->isBroker()) {
        return $this->belongsToMany('App\Property');
    }

    return null;
}

这已经是一个很大的站点，已经编写了许多关系调用，所以当我认为我可以简单地修改关系定义时，我不希望重构所有这些代码实例.

This is already a large site with many relationship calls already written so I do not wish to have to refactor all those code instances when I believe I can simply modify the relationship definition.

当用户是管理员时，如何从该函数返回包括所有模型的关系，并保持该关系，以便无需修改站点周围$ user-> properties的使用?

How can I return a relationship from this function that includes all models when the user is an admin, and keep it so the use of $user->properties around the site will not need to be modified?

[2018-06-02 12:58:23] local.ERROR: LogicException: Relationship method must return an object of type Illuminate\Database\Eloquent\Relations\Relation in /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php:403
Stack trace:
#0 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php(386): Illuminate\Database\Eloquent\Model->getRelationshipFromMethod('sites')
#1 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php(316): Illuminate\Database\Eloquent\Model->getRelationValue('sites')
#2 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php(1279): Illuminate\Database\Eloquent\Model->getAttribute('sites')
#3 /home/vagrant/Leadgen/app/Http/Controllers/Backend/SiteController.php(29): Illuminate\Database\Eloquent\Model->__get('sites')
#4 [internal function]: App\Http\Controllers\Backend\SiteController->index(Object(Illuminate\Http\Request))
#5 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Controller.php(55): call_user_func_array(Array, Array)
#6 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(44): Illuminate\Routing\Controller->callAction('index', Array)
#7 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Route.php(203): Illuminate\Routing\ControllerDispatcher->dispatch(Object(Illuminate\Routing\Route), Object(App\Http\Controllers\Backend\SiteController), 'index')
#8 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Route.php(160): Illuminate\Routing\Route->runController()
#9 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Router.php(572): Illuminate\Routing\Route->run()
#10 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(30): Illuminate\Routing\Router->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#11 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php(41): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#12 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Routing\Middleware\SubstituteBindings->handle(Object(Illuminate\Http\Request), Object(Closure))
#13 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#14 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Auth/Middleware/Authenticate.php(43): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#15 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Auth\Middleware\Authenticate->handle(Object(Illuminate\Http\Request), Object(Closure))
#16 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#17 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php(65): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#18 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Foundation\Http\Middleware\VerifyCsrfToken->handle(Object(Illuminate\Http\Request), Object(Closure))
#19 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#20 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/View/Middleware/ShareErrorsFromSession.php(49): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#21 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\View\Middleware\ShareErrorsFromSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#22 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#23 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(64): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#24 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Session\Middleware\StartSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#25 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#26 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/AddQueuedCookiesToResponse.php(37): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#27 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle(Object(Illuminate\Http\Request), Object(Closure))
#28 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#29 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php(59): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#30 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Cookie\Middleware\EncryptCookies->handle(Object(Illuminate\Http\Request), Object(Closure))
#31 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#32 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(102): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#33 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Router.php(574): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#34 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Router.php(533): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request))
#35 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Router.php(511): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request))
#36 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(176): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request))
#37 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(30): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request))
#38 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(30): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#39 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#40 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#41 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(30): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#42 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#43 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#44 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#45 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle(Object(Illuminate\Http\Request), Object(Closure))
#46 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#47 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/CheckForMaintenanceMode.php(46): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#48 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(148): Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode->handle(Object(Illuminate\Http\Request), Object(Closure))
#49 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(53): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#50 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(102): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#51 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(151): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#52 /home/vagrant/Leadgen/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(116): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request))
#53 /home/vagrant/Leadgen/public/index.php(53): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate

推荐答案

由于它不是真正的关系，因此无法将其作为一个整体进行访问.使用这个:

Since it isn't a real relationship, you can't access it as one. Use this:

$sites = $user->sites()->get();

如果您想将其作为属性访问并且不需要查询对象(例如，添加其他约束)，则可以使用访问器:

If you want to access it as a property and don't need the query object (e.g. to add other constraints), you can use an accessor:

public function getPropertiesAttribute()
{
    if ($this->isAdmin()) {
        return Property::all();
    } elseif ($this->isManager() || $this->isBroker()) {
        return $this->belongsToMany('App\Property')->get();
    }

    return null;
}

肮脏的骇客:

public function sites()
{
    if ($this->isAdmin()) {
        return $this->hasMany('App\Site', 'id')->orWhereRaw(1);
    }
    return $this->belongsToMany('App\Site');
}

这篇关于Laravel 5.4如果用户是管理员，如何获取所有关系的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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