October/Winter CMS 在Model使用beforeSave方法做数据预处理
今天使用系统内置的taglist字段来实现tag标签功能，因为数据表中存在slug的必填项导致数据录入的时候它会提示错误，这时候需要在Model中使用beforeSave方法来做数据预处理
public function beforeSave()
{
if(!$this->slug){
$slugString = $this->title;
if(!preg_match("/[a-z]/i", $slugString)){
$slugString = urlencode($slugString); //中文转码
}
$this->slug = str_slug($slugString);
}
}其中使用urlencode是将把中文字符转码。
Model的事件（Events）
| Event | Description |
|---|---|
| beforeCreate | before the model is saved, when first created. |
| afterCreate | after the model is saved, when first created. |
| beforeSave | before the model is saved, either created or updated. |
| afterSave | after the model is saved, either created or updated. |
| beforeValidate | before the supplied model data is validated. |
| afterValidate | after the supplied model data has been validated. |
| beforeUpdate | before an existing model is saved. |
| afterUpdate | after an existing model is saved. |
| beforeDelete | before an existing model is deleted. |
| afterDelete | after an existing model is deleted. |
| beforeRestore | before a soft-deleted model is restored. |
| afterRestore | after a soft-deleted model has been restored. |
| beforeFetch | before an existing model is populated. |
| afterFetch | after an existing model has been populated. |
更多Model内置的方法可参考：https://docs.octobercms.com/2.x/database/model.html#events