Laravel eloquent query using two relations - php

Question

I have next db structure - product can be in many categories, product can be in many markets. Models \App\Product, \App\Market and \App\Category are created with many to many relations - belongsToMany().
class Product extends Model
{
public function categories()
{
return $this->belongsToMany('App\Category');
}
public function markets()
{
return $this->belongsToMany('App\Market');
}
}
class Category extends Model
{
public function products()
{
return $this->belongsToMany('App\Product');
}
}
class Market extends Model
{
public function products()
{
return $this->belongsToMany('App\Product');
}
}
In route.web I get category to display products
Route::get('/catalog/{current_category?}', 'CatalogController#index')->name('catalog.index');
Current market I can get from session (user select market when open website)
$market = $request->session()->get('market'); // or Session::get('market');
// $market->id
// $market->slug
In my MarketController#index I want to get all products for category from route and for current market from session. But how can I do it? I can get category products and market products. But how can I get category and market products at the same time?
public function index(Request $request, Category $current_category = null)
{
if ($current_category) {
$market_id = $request->session()->get('market')->id;
$products = $current_category->products;
// ...
}
}

Answer 1

If you want product based on category , use below query:
$products = $current_category->products()->get();
If you want products based on market, first you need to get market object than you can get products based on it.
$market = Market::find($market_id);
$market_products = $market->products()->get();
If you want products based on market and category you can use below query.
$products = Product::whereHas('categories', function($q) {
$q->where('category_id', $current_category->id);
})
->whereHas('markets', function($q) {
$q->where('market_id', $market_id);
})
->get();

Answer 2

As pointed in comment, you can achieve it with many to many polymorphic relation
tables structure
categories
id - integer
name - string
markets
id - integer
name - string
products
id - integer
name - string
productables
product_id - integer
productable_id - integer
productable_type - string
Category model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Category extends Model
{
/**
* Get all of the products for the category.
*/
public function products()
{
return $this->morphToMany('App\Product', 'productable');
}
}
Market model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Market extends Model
{
/**
* Get all of the products for the market.
*/
public function products()
{
return $this->morphToMany('App\Product', 'productable');
}
}
Product model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Product extends Model
{
/**
* Get all of the categories that are assigned this product.
*/
public function categories()
{
return $this->morphedByMany('App\Category', 'productable');
}
/**
* Get all of the markets that are assigned this product.
*/
public function markets()
{
return $this->morphedByMany('App\Market', 'productable');
}
}
Than you can get products belonging to both (certain category and certain market) with
$products = \App\Product::where(['productable_id' => $category->id, 'productable_type' => get_class($category)])->orWhere(['productable_id' => $market->id, 'productable_type' => get_class($market)])->get();
assuming from your question that category and market are already known.
#YasinPatel 's solution should work too, but this way your DB architecture is more flexible. It's up to you now. Study about polymorphic relations solutions, you could find it interesting.