How to make pagination by $category->companies in Laravel - php

Question

I listed my category companies and i want to paginate by them. How can i do it?
This is my view:
#foreach ($category->companies as $singleCompany)
<div class="col-sm-12 col-lg-4 col-md-6">
<!-- product card -->
<div class="product-item bg-light">
<div class="card">
<div class="card-body">
<h4 class="card-title">{{$singleCompany->name}}</h4>
#foreach ($singleCompany->categories as $singleCategories)
<ul class="list-inline product-meta">
<li class="list-inline-item">
<i class="fa fa-folder-open-o"></i>{{ $singleCategories->name }}
</li>
</ul>
#endforeach
</div>
</div>
</div>
</div>
#endforeach
My controller looks like this:
$companies = Company::filterByRequest($request)->paginate(9);
$category = Category::find($id);
My category schema:
if(! Schema::hasTable('categories')) {
Schema::create('categories', function (Blueprint $table) {
$table->increments('id');
$table->string('name')->nullable();
$table->string('icon')->nullable();
$table->timestamps();
$table->softDeletes();
$table->index(['deleted_at']);
});
My company schema:
if(! Schema::hasTable('companies')) {
Schema::create('companies', function (Blueprint $table) {
$table->increments('id');
$table->string('name')->nullable();
$table->string('city_id')->nullable();
$table->string('categories')->nullable();
$table->string('address')->nullable();
$table->text('description')->nullable();
$table->string('logo')->nullable();
$table->timestamps();
$table->softDeletes();
$table->index(['deleted_at']);
});
}
Pivot table for company_category
if(! Schema::hasTable('category_company')) {
Schema::create('category_company', function (Blueprint $table) {
$table->integer('category_id')->unsigned()->nullable();
$table->foreign('category_id', 'fk_p_91029_91033_company__5a12afe2d2772')->references('id')->on('categories')->onDelete('cascade');
$table->integer('company_id')->unsigned()->nullable();
$table->foreign('company_id', 'fk_p_91033_91029_category_5a12afe2d27f0')->references('id')->on('companies')->onDelete('cascade');
});
Can i use somehow $category->companies to paginate my companies? Thank you for help.

Answer 1

Sorry I don't know if $category->companies would be possible in this case.
You might want to try this code.
$companies = Company::leftJoin('category_company', 'companies.id',
'=', 'category_company.company_id')
->where('category_id', $id)
->paginate(9);
This code will left join the table companies and category_company.
It will also be able to get the companies that has the chosen category id.
The result is also ready for pagination in your blade.

Answer 2

If you want pagination for category you have to use paginate() for category.
Try changing your get category query by this
$category = Category::where('unique_id', $id)->paginate(9);
Then you can use {{ $category->render() }} where you need pagination

Answer 3

$category->companies will return an Eloquent collection with all companies and not an instance of LengthAwarePaginator.
$companies will return an instance of LengthAwarePaginator, so iterate over it.
In comments, you've said you want to load companies of specified category. If you've defined the belongsToMany() relationship already, use whereHas() to filter by category:
$companies = Company::filterByRequest($request)
->whereHas('categories', function($q) use($categoryId) {
$q->where('id', $categoryId);
})
->paginate(9);
Then display companies:
#foreach ($companies as $singleCompany)
{{ $singleCompany->name }}
#endforeach
And add pagination links:
{{ $companies->render() }}
https://laravel.com/docs/5.5/pagination