Question

我们希望使用Eloquent ORM和Laravel 5为http://www.mbarendezvous.com/实现Composite主键我明白Eloquent目前不支持它。请建议什么应该是相同的最佳选择。

Answer 1

我使用以下代码。它会覆盖原始的Model.php方法并考虑所有主键。将其放入使用复合主键的模型中：

protected function getKeyForSaveQuery()
{

    $primaryKeyForSaveQuery = array(count($this->primaryKey));

    foreach ($this->primaryKey as $i => $pKey) {
        $primaryKeyForSaveQuery[$i] = isset($this->original[$this->getKeyName()[$i]])
            ? $this->original[$this->getKeyName()[$i]]
            : $this->getAttribute($this->getKeyName()[$i]);
    }

    return $primaryKeyForSaveQuery;

}

/**
 * Set the keys for a save update query.
 *
 * @param  \Illuminate\Database\Eloquent\Builder  $query
 * @return \Illuminate\Database\Eloquent\Builder
 */
protected function setKeysForSaveQuery(Builder $query)
{

    foreach ($this->primaryKey as $i => $pKey) {
        $query->where($this->getKeyName()[$i], '=', $this->getKeyForSaveQuery()[$i]);
    }

    return $query;
}

编辑：不要忘记在模型类中添加以下内容，否则这不会起作用。

public $incrementing = false;

Answer 2

您可以从laravel的Model类中覆盖setKeysForSaveQuery方法。您可以将此方法更改为：

/**
 * Set the keys for a save update query.
 *
 * @param  \Illuminate\Database\Eloquent\Builder  $query
 * @return \Illuminate\Database\Eloquent\Builder
 */
protected function setKeysForSaveQuery(Builder $query)
{
    $query->where($this->getKeyName(), '=', $this->getKeyForSaveQuery());
    $query->where('secondKeyName', $this->secondKeyName); // <- added line

    return $query;
}

Answer 3

您可以覆盖扩展具有复合键的Model的类的save（）方法，如下所示：

public function save(array $options = array())
{
  $query = $this->newQueryWithoutScopes();
  // MY MODEL SPECIFIC FIX
  $query->where('OTHER_ID', '=', $this->OTHER_ID);
  // END MY FIX

 // the rest of the standard model->save() code is here but I cut it out for brevity. 
 // Use what is in Model.php already. 
}

我在这里看到了这个解决方案：https://github.com/laravel/framework/issues/5517

Answer 4

迁移中的

使用以下

$table->primary(['first', 'last']);

参考链接：https://laravel.com/docs/5.4/migrations#indexes

具有Eloquent的复合主键

4 个答案: