在魔術方法__callStatic中對Trait函數進行別名定義
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P粉226642568 2023-07-31 11:46:23
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<p>我有一個Queryable trait,它使用__callStatic方法建立一個Builder的新實例,並在其上執行呼叫的函數(如果存在)。它傳回Builder以便鍊式查詢(類似於Eloquent)。 <br /><br />現在我正在嘗試實現一個需要find()函數的接口,但是在Queryable trait的phpDoc中聲明了find()函數(@method static static find(mixed $primaryKeyValue) ),這就創造了衝突:</p><p><code></code></p> <blockquote> <p>Queryable的find(primaryKeyValue: mixed)的宣告必須與StorageInterface->find(primaryKeyValue: mixed)相容,無法建立介面方法。 </p> </blockquote> <p>為了解決這個衝突,我試著用類似trait別名的方式(use Queryable { Queryable::find as queryFind; })來解決,但是接著我遇到了...</p> <blockquote> <p>編譯錯誤:為appFrameworkTraitsQueryable::find定義了一個別名,但方法不存在。</p> </blockquote> <p>我似乎找不到解決方法,有位高手幫我嗎? :)(我相信這與類別上的某種存在檢查有關,因為它是魔術方法,但我也不知道如何修復它..)</p> <pre class="brush:php;toolbar:false;"><?php namespace appFrameworkTraits; use appFrameworkDatabaseBuilder; use appFrameworkDatabasePaginator; /*** @方法靜態 int count() * @method static static|陣列;首先(int $金額 = 1) * @method static static|陣列;最後(int $金額 = 1) * @method 靜態字串 getQuery() * @method 靜態字串 getRawQuery() * @method 靜態字串 getPrimaryKey() * @method static static find(混合$primaryKeyValue) * @method靜態數組;全部() * @method靜態數組;得到() * @方法靜態分頁器 paginate() * @method static Builder table(string $tableName) * @method static Builder PrimaryKey(字串 $primaryKey) * @method static Builder perPage(int $perPageAmount) * @method static Builder 其中(字串$column,混合$operatorOrValue = null,混合$value = null) * @method static Builder whereIn(字串$column, 陣列$search) * @method static Builder whereNotNull(string $column) * @method static Builder select(...$columns) * @method static Builder with(string $relation, Closure $closure) * @method static Builder orderBy(string $column, string $direction = 'desc') * @method static Builder limit(int $amount) * @method static Builder 偏移量(int $amount)*/ trait Queryable { public static function __callStatic(string $name, array $arguments) { $functions = get_class_methods(Builder::class); if (in_array($name, $functions)) { $builder = new Builder(static::class); return $builder->$name(...$arguments); } $selfFunctions = get_class_methods($calledClass = static::class); if (!in_array($name, $selfFunctions)) { throw new BadMethodCallException("Static method '{$name}' does not exist on {$calledClass}."); } return static::$name(...$arguments); } } class BaseModel extends stdClass implements QueryableInterface, StorableInterface { use Queryable { Queryable::find as queryFind; } public function find(mixed $primaryKeyValue): static { return self::queryFind($primaryKeyValue); } } <?php namespace appStorageMethods; interface StorableInterface { function getObject(mixed $primaryKeyValue): static; function find(mixed $primaryKeyValue): static; function save(): static; }</pre> <p><br /></p>
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Trait方法可以「重新命名」:(實際上是一個別名)

use Queryable {
    find as MyFind;
}

Reference

#

簡單範例:

<?php

Trait myTrait
{
    public static function __callStatic ($method, $arguments)
    {
        $className = self::class;
        
        return (new $className ())->$method(...$arguments);
    }
    
    
    private function find()
    {
        echo "\naaaaaaaaaaaaa\n";
        return $this;
    }
}


interface MyInterface
{
    public function find();
}   


class Test Implements MyInterface
{
    Use myTrait {
        find as myFind;
    }
    
    public function find()
    {
        echo "\nxxxxxx\n";
    }
    
}


Test::myFind()->find(); 
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