仅显示Laravel中选定类别的产品

Question

I'm trying to show products only from selected category but something goes wrong and I still can't understand what.

What I have done so far is I have added route in routes.php

Route::get('/admin/category/single/{categoryId}', ['uses' => 'AdminController@categoriesCheck']);

Then in AdminController I have added

public function categoriesCheck() {
    $products = Product::paginate(15);
    $categories = Categories::all();
    return View::make('site.admin.single_category', [
        'categories' => $categories,
        'product' => $products
    ]);
}

so 2 questions how if I click on category_id=1 how to make query to load only products where category_id=1 ( I have made column in product table which hold category_id for each product ) and how to make the view page?

currently I have dummy single_category.blade.php

@extends('layouts.master')
@section('title', 'Categories')

@section('content')

<div class="col-xs-12">
    <h3>Products List</h3>
    <hr />

    <div class="row">
    @foreach($products as $i => $product)
        <div class="col-md-4">
            <div class="panel panel-default text-center">
                <div class="panel-heading">{{{ $product['title'] }}}</div>
                <div class="panel-body min-h-230">
                    @if($product['image'])
                        <img class="max-150" src="{{ $product['image'] }}" alt="{{{ $product['title'] }}}" />
                        <br /><br />
                    @endif
                    {{ str_limit($product->description_small, 100) }}
                    @if (strlen($product->description_small) > 100)
                       <br/><br /> <a href="{{ URL::to('product/single/' . $product->product_id) }} " class="btn btn-info btn-block view-more">View More</a>
                    @endif
                </div>
            </div>
        </div>
    @if(($i+1) % 3 == 0)
    </div><div class="row">
    @endif
    @endforeach
    </div>

    <hr />
    {{ $products->links() }}
</div>
@endsection

When I run the page now I got all products... no matter what category I click

Answer 1

First in your Category model you have to make the relationship with your Products so add this:

public function products()
{
    return $this->hasMany('Product');
}

Then in your controller you have to accept the category ID from the route and query a category by it:

public function categoriesCheck( $categoryId ) 
{
    $category = Categories::with('products')->findOrFail( $categoryId );
    return View::make('site.admin.single_category', [
        'category' => $category
    ]);
}

And finally in your view check if a category has products and if it has loop them:

@if($category->products->count())
    @foreach($category->products as  $product)
        //DIsplay product data
    @endforeach
@endif