Laravel 模型获取类的实例
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Laravel model getting instances of the class
提问by pfried
I am developing a package in the workbench environment. I have a model like
我正在工作台环境中开发一个包。我有一个像
<?php namespace Vendor\Webshop\Models;
use Vendor\Webshop\Models\Country as Country;
use Illuminate\Database\Eloquent\Model as Eloquent;
/**
* A catalog
*/
class Catalog extends Eloquent {
// Define the database
protected $table = 'catalogs';
// Mass assignment restriction
protected $guarded = array('id');
// Return the countries related to this catalog
public function countries() {
return $this->belongsToMany('Vendor\Webshop\Models\Country');
}
/**
* Returns whether to enforce the compability check or not
*/
public function getForceCompabilityTest() {
return $this->force_compability_check;
}
}
?>
I wondered if i can have custom instance getters like
我想知道我是否可以拥有像这样的自定义实例 getter
public function getDefaultCatalogs() {
return Catalog::where('is_default_catalog', '=', true)->get();
}}
within the class itself. Is this possible or are the methods only available to a concrete instance, can i call them like Catalog::getDefaultCatalogs()from outside of the class?
在类本身内。这是可能的还是这些方法仅适用于具体实例，我可以像Catalog::getDefaultCatalogs()从类外部一样调用它们吗？
采纳答案by Andreyco
Laravel's Eloquent support this kind of behaviour - it's call "Query Scopes" http://laravel.com/docs/eloquent#query-scopes
Laravel 的 Eloquent 支持这种行为 - 它被称为“查询范围” http://laravel.com/docs/eloquent#query-scopes
In your model, to this:
在您的模型中，对此：
class Catalog extends Eloquent {
public function scopeDefault($query)
{
return $query->where('is_default_catalog', '=', true);
}
}
Then, you can retrieve record with this call
然后，您可以通过此调用检索记录
$defaultCatalog = Catalog::default()->get();
// or even order them, if there are more than 1 default catalog. And so on...
$defaultCatalog = Catalog::default()->orderBy('created_at')->get();
回答by pfried
I just added the method as a static method to the Eloquent model and it works fine. If anybody has comments on this, let me know.
我刚刚将该方法作为静态方法添加到 Eloquent 模型中，并且运行良好。如果有人对此有意见，请告诉我。
public static function getDefaultCatalog() {
return Catalog::where('is_default_catalog', '=', true)->firstOrFail();
}}
