文章关联多分类

app/Admin/Selectable/CategorySelectAble.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Admin\Selectable;
+
+use App\Models\Category;
+use Encore\Admin\Grid\Filter;
+use Encore\Admin\Grid\Selectable;
+
+class CategorySelectAble extends Selectable
+{
+
+    public $model = Category::class;
+
+    public static function display()
+    {
+        return function ($value) {
+            if (is_array($value)) {
+                return implode(';', array_column($value, 'title'));
+            }
+
+            return optional($this->categories)->title;
+        };
+    }
+
+    public function make()
+    {
+        $this->model()->where('status', 1);
+
+        $this->column('id', 'ID');
+        $this->column('title', '分类名称');
+        $this->column('type', '类型')->using(Category::TYPES);
+
+        $this->filter(function (Filter $filter) {
+            $filter->like('title', '分类名称');
+            $filter->equal('parent.id', '所属分类')
+                   ->select(Category::selectOptions(function ($model) {
+                       return $model->where('status', 1)
+                                    ->whereIn('type', [Category::TYPE_ARTICLE, Category::TYPE_SHOW]);
+                   }, '所有分类'));
+            $filter->equal('type', '类型')->select(Category::TYPES);
+        });
+    }
+
+}