next/prev month is not working in laravel - php

Question

So I have this view that shows a table and two buttons (next/prev). Each button has a query string /?date=next that I capture in my controller using request()->has('date').
<a class="button is-primary is-outlined" href="/?date=prev">Previous</a>
<a class="button is-primary is-outlined" href="/?date=next">Next</a>
The user shall be able to go to next month, and the month after that depending on how many times he clicks on the next/prev button.
Initially, I had two approaches. First, I thought to myself that I can use a $count that increments whenever the user clicks the button in $post->whereMonth('date', $this->count). Second, simply use the Carbon library, $post->date->addMonth().
In both approaches, the date remain the same despite the number of times the next/prev button was clicked.
First approach:
class PostsController extends Controller
{
protected $count;
public function __constructor(){
$this->count = 0;
}
public function show(Hour $post){
if(request()->has('date') == 'next'){
$posts = $post->whereMonth('date', $this->count);
$this->count++;
} else if(request()->has('date') == 'prev'){
$posts = $post->whereMonth('date', $this->count);
$this->count++;
}
return view('user.table', compact('posts'));
}
}
Second approach (favorite):
public function show(Hour $post){
if(request()->has('date') == 'next'){
$posts = $post->date->addMonth();
} else if(request()->has('date') == 'prev'){
$posts = $post->date->subMonth();
}
return view('user.table', compact('posts'));
}
I've seen that Laravel provide the query builder increment, but that only work for columns, and not variables.
Is there a way I can make this work by remembering the previous date as shown in the second approach.

Answer 1

Looks like you just want to display a date. In this case, do this:
public function show(Hour $post)
{
$months = request('months', 0);
if (request('date') === 'next'){
$posts = $post->date->addMonth();
$months++;
} elseif(request('date') === 'prev'){
$posts = $post->date->subMonth();
$months--;
}
return view('user.table', compact('posts', 'months'));
}
And in the view:
<a class="button is-primary is-outlined" href="/?date=next&months={{ $months }}">Previous</a>
<a class="button is-primary is-outlined" href="/?date=next&months={{ $months }}">Next</a>