laravel how to paginate single category posts - php

Question

How can I paginate posts in single category page?
Code
public function show($slug) {
$category = Category::where('slug', $slug)->where('online', true)->with(['posts' => function ($q) {
$q->orderBy('id', 'desc');
//I need this query be paginate
}])->first();
//return....
}
my blade loop
<h1>{{$category->name}}</h1>
#foreach($category->posts as $post)
//post data here
#endforeach

Answer 1

The relationship of categories and posts is n:n;
Because you just need one category, you just need to get posts by one category.
Try to use another method:
public function show($slug) {
$cat = Category::where('slug', $slug)
->where('online', true)
->first();
$posts = Post::join('category_posts', 'category_posts.post_id', '=', 'posts.id')
->where('category_posts.category_id', $cat->id)
->selectRaw('posts.*')
->paginate(10);
//return....
}
And in your blade loop:
<h1>{{$cat->name}}</h1>
#foreach($posts as $post)
//post data here
#endforeach

Answer 2

here is the exact example which I always use in my several project.
Controller:
public function index(Request $request){
$parts = BikeParts::paginate(5); //you can change how many you want
return view('admin.bike_parts.index_excel', compact(['bike_parts']))->with('i', ($request->input('page', 1) - 1) * 5); // put exact number you are paginating , in here I used 5.
}
View:
<table class="table table-actions-bar m-b-0">
<tbody>
<thead>
<tr>
<th>id</th>
<th>PartNo.</th>
<th>Part Name</th>
<th>model</th>
<th>Retail Price</th>
</tr>
</thead>
#foreach($bike_parts as $bike_part)
<tr>
<td>{{$loop->index+1}}</td>
<td>{{$bike_part->part_number}}</td>
<td>{{$bike_part->description}}</td>
<td>{{$bike_part->bike_model}}</td>
<td>{{$bike_part->retail_price}}</td>
</tr>
#endforeach
</tbody>
</table>
{!! $bike_parts->render() !!}

Answer 3

Instead of using first(), use paginate(count)
Here is an example according to your code,
public function show($slug) {
$category = Category::where('slug', $slug)
->where('online', true)
->with(['posts' => function ($q) {
$q->orderBy('id', 'desc');
}])->paginate(10);
//return....
}

Answer 4

$posts = Post::where('category_id', $categoryId)->paginate(10);

Answer 5

Heres a way that may be used to achieve paginated posts in multiple category
However, I suspect that this will make a N+1 query. Might need eager loading implemented with this. Can someone confirm this ?
// Category.php (Model)
public function posts()
{
return $this->hasMany('App\posts', 'post_id', 'id');
}
In the blade file
#foreach($categories as $category)
<h1>{{$category->name}}</h1>
#foreach($category->posts()->paginate() as $post)
//post data here
#endforeach
#endforeach