文章分类由1变多

app/Admin/Selectable/CategorySelectAble.php

@@ -0,0 +1,37 @@
+<?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->filter(function (Filter $filter) {
+            $filter->like('title', '分类名称');
+        });
+    }
+
+}