Laravel recursion - calling itself in a class

Question

My current code:

public function countThreads() {
    $count = $this->threads->count();
    if ($this->hasSubforum()) {
        foreach ($this->subforums as $subforum) {
            $count += $this->countThreads($subforum);
        }
    }
    return $count;
}

I am currently accessing the "thread" as $this inside my model. I need to pass in the $subforum to itself but how can I do that in a class?

In my controller, I'm simply doing:

$forum = Forum::where('id', $id)->first();
$forum->countThreads();

How can I do recursion with this? thanks!

Coloured Panda · Accepted Answer · 2016-06-21 07:05:02Z

2

You don't need to pass any arguments*, you can call the countThreads method on the subforum $subforum->countThreads()

public function countThreads() 
{
    $count = $this->threads->count();
    if ($this->hasSubforum()) {
        foreach ($this->subforums as $subforum) {
            $count += $subforum->countThreads();
        }
    }

    return $count;
}

If you really want to pass it in as an argument, the correct way would be to write it as a service outside of the model

edited Jun 21, 2016 at 7:05

answered May 7, 2016 at 20:42

Coloured Panda

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