具有两个主键的Laravel模型更新

我已经遇到过几次这个问题。您需要覆盖一些属性：

protected $primaryKey = ['user_id', 'stock_id'];public $incrementing = false;

和方法（功劳）：

protected function setKeysForSaveQuery(Builder $query){    $keys = $this->getKeyName();    if(!is_array($keys)){        return parent::setKeysForSaveQuery($query);    }    foreach($keys as $keyName){        $query->where($keyName, '=', $this->getKeyForSaveQuery($keyName));    }    return $query;}protected function getKeyForSaveQuery($keyName = null){    if(is_null($keyName)){        $keyName = $this->getKeyName();    }    if (isset($this->original[$keyName])) {        return $this->original[$keyName];    }    return $this->getAttribute($keyName);}

请记住，此代码需要引用Eloquent Builder类，

use IlluminateDatabaseEloquentBuilder;

我建议将这些方法放入

HasCompositePrimaryKey

use