Laravel 5 覆盖 Eloquent 保存方法
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Laravel 5 Override Eloquent Save Method
提问by OrgGila
I have composite primary keys so Laravel's save() method didn't work. Therefore I need to override the save method. For example, my primary key is a composite key consisting of column_a and column_b. Can you give me example how to override the save method and where I put it?
我有复合主键，所以 Laravel 的 save() 方法不起作用。因此我需要覆盖 save 方法。例如，我的主键是由 column_a 和 column_b 组成的复合键。你能举例说明如何覆盖保存方法以及我把它放在哪里吗？
My Primary Key: column_a, column_b
我的主键：column_a、column_b
I've tried the followings:
我尝试了以下方法：
protected function setKeysForSaveQuery(Builder $query)
{
parent::setKeysForSaveQuery($query);
$query->where('locale', '=', $this->locale);
return $query;
}
I found above code, but it causes 500 Internal Server Error even I call a method that only reads value from database. I have set $primaryKey = 'column_a' and 'locale' (inside where) to column_b. I didn't know what $this->locale refers to?
我找到了上面的代码，但即使我调用一个只从数据库读取值的方法，它也会导致 500 Internal Server Error。我已将 $primaryKey = 'column_a' 和 'locale'（在 where 内）设置为 column_b。我不知道 $this->locale 指的是什么？
Here is another way I found, but it failed too
这是我发现的另一种方法，但它也失败了
protected $secondaryKey = 'column_b';
function newQuery()
{
$query = parent::newQuery();
$query->where($this->secondaryKey, '=', $this->type);
return $query;
}
Again, I didn't know what $this->type refers to.
同样，我不知道 $this->type 指的是什么。
回答by OrgGila
I have found the solution. In the model, add primaryKey variable and the following function
我找到了解决办法。在模型中，添加primaryKey变量和如下函数
protected $primaryKey = array('column1','column2');
protected function setKeysForSaveQuery(\Illuminate\Database\Eloquent\Builder $query) {
if (is_array($this->primaryKey)) {
foreach ($this->primaryKey as $pk) {
$query->where($pk, '=', $this->original[$pk]);
}
return $query;
}else{
return parent::setKeysForSaveQuery($query);
}
}
Source: https://github.com/laravel/framework/issues/5517#issuecomment-113655441
来源：https: //github.com/laravel/framework/issues/5517#issuecomment-113655441
