I have read many of the posting on this on here, and the Docs, but still am having problems figuring out how to do what I want.

I am using a GridView with dropDown filters. I currently have the following code in my Audio model to get the selection array:

Public function getFeednameSelect() {
   return ArrayHelper::map(
             Audio::find()
                ->select('feedname')
                ->distinct()
                ->asArray()
                ->all(),
             'feedname', 'feedname'),
}

The Audio model currently has over 83k records. I would like to

• Probably cache save to a File
• Have it rebuild once or twice a day.
• It could be linked to changes in a different model Feeds model is count(*) changes.
• I’m using the basic-app

I really haven’t tried anything yet. This is my first attempt at caching anything.