如何在laravel中缓存函数的结果

Question

I would like to know if it is possible to store the results of a function in cache for each possible outcome.

This is not an exact example below, the real example is a lot more complex and I need to cache the results for speed reasons, but this gives you an idea of what I'm trying to accomplish

For example I have a function that retrieves the users comments:

public function getUserComments(User $user)
{
    $comments = DB::table('comments')->where('user_id',$user->id)->get();
    return $comments;
}

I need to save all the possible outcomes for each individual user in my system so essentially.

For example if I have 100 users:

foreach ($users as $user) {
       $cachedResults [] = $user->getUserComments();
}

Now I have the cached results that are faster to look through: $cachedResults

Answer 1

Something like this should do the trick(not tested):

public function getUserComments(User $user)
{
    $key = "comments-${$user->id}";

    $comments = Cache::remember($key, 60, function () {
        return DB::table('comments')->where('user_id',$user->id)->get();
    });

    return $comments
}

60 is the amount of minutes here. You have to configure your cache if you want something other than the default, which is the file cache driver.