产品分类，只显示两层

app/Distributor/Controllers/DistProductCategoryController.php

@@ -77,7 +77,7 @@ class DistProductCategoryController extends AdminDistController
     {
         return Form::make(new DistProductCategory(), function (Form $form) {
             $form->select('parent_id', admin_trans_field('parent'))
-                ->options(DistProductCategory::selectMainOptions())
+                ->options(DistProductCategory::selectOptionsShowTow())
                 ->saving(function ($v) {
                     return (int) $v;
                 });

app/Distributor/Repositories/DistProductCategory.php

@@ -80,6 +80,27 @@ class DistProductCategory extends EloquentRepository
         return $selectOptions;
     }
 
+    public static function selectOptionsShowTow(\Closure $closure = null)
+    {
+        if (!$closure) {
+            $closure = function ($query) {
+                $query = $query->where('dist_id', getDistributorId());
+                $query = $query->where('enabled', 1);
+                $query =  $query->orderBy('order', 'desc')->orderBy('id', 'desc');
+                return $query;
+            };
+        }
+
+        $selectOptions = Model::class::selectOptions($closure);
+        //只显示2层
+        foreach ($selectOptions as $key => $value) {
+            if (substr_count($value,' ') > 8) {
+                unset($selectOptions[$key]);
+            }
+        }
+        return $selectOptions;
+    }
+
 
     public static function getParameter($categoryId)
     {