fix on shelve with available offers

app/Models/Shop/Basket.php

@@ -12,6 +12,6 @@ class Basket extends Model
 
     public function Offer()
     {
-        return $this->belongsTo('App\Models\Shop\Offer');
+        return $this->belongsTo(Offer::class);
     }
 }

app/Models/Shop/Categorizable.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Models\Shop;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Categorizable extends Model
+{
+    protected $table = 'categorizables';
+
+    public function categorizable()
+    {
+        return $this->morphTo();
+    }
+
+    public function category()
+    {
+        return $this->belongsTo(Category::class);
+    }
+
+    public function articles()
+    {
+        return $this->belongsTo(Article::class)->where('categorizable_type', Article::class);
+    }
+
+    public function scopeByCategory($query, $category_id)
+    {
+        return $query->where($this->table . '.category_id', $category_id);
+    }
+
+    public function scopeByCategories($query, $categories_id)
+    {
+        return $query->whereIn($this->table . '.category_id', $categories_id);
+    }
+
+    public function scopeByCategoryParent($query, $category_id)
+    {
+        $category = Category::find($category_id);
+        return $query->whereHas('category', function ($query) use ($category) {
+            return $query->inRange($category->_lft, $category->_rgt);
+        });
+    }
+}

app/Models/Shop/Category.php

@@ -36,11 +36,21 @@ class Category extends parentCategory
         return $this->morphedByMany(Article::class, 'categorizable');
     }
 
+    public function ArticlesByParent()
+    {
+
+    }
+
     public function ArticlesTagged()
     {
         return $this->tags->articles;
     }
 
+    public function categorizables()
+    {
+        return $this->hasMany(Categorizable::class);
+    }
+
     public function countArticlesTagged()
     {
         return $this->tags()->withCount('Articles');
@@ -66,6 +76,11 @@ class Category extends parentCategory
         return $query->where('id', '<>', 1);
     }
 
+    public function scopeInRange($query, $_lft, $_rgt)
+    {
+        return $query->where('_lft', '>=', $_lft)->where('_rgt', '<=', $_rgt);
+    }
+
     public function scopeHasAvailableOffers($query, $sale_channel_id = false)
     {
         $sale_channel_id = $sale_channel_id ? $sale_channel_id : SaleChannels::getDefaultID();
@@ -73,4 +88,12 @@ class Category extends parentCategory
             $query->WithAvailableOffers($sale_channel_id);
         });
     }
+
+    public function scopeHasAvailableOffersByCategoryParent($query, $sale_channel_id = false)
+    {
+        $sale_channel_id = $sale_channel_id ? $sale_channel_id : SaleChannels::getDefaultID();
+        return $query->whereHas('articles', function ($query) use ($sale_channel_id) {
+            $query->WithAvailableOffers($sale_channel_id);
+        });
+    }
 }