minor fixes

app/Models/Shop/SaleChannel.php

@@ -10,6 +10,16 @@ class SaleChannel extends Model
 
     protected $table = 'shop_sale_channels';
 
+    public function customer_sale_channels()
+    {
+        return $this->hasMany(CustomerSaleChannel::class);
+    }
+
+    public function customers()
+    {
+        return $this->belongsToMany(Customer::class, CustomerSaleChannel::class)->wherePivotNull('deleted_at');
+    }
+
     public function deliveries()
     {
         return $this->hasMany(Delivery::class);
@@ -29,4 +39,9 @@ class SaleChannel extends Model
     {
         return $query->where($this->table.'.code', $code);
     }
+
+    public function scopeById($query, $id)
+    {
+        return $query->where($this->table.'.id', $id);
+    }
 }