add cms banners

catch/cms/model/events/BannersEvent.php

@@ -0,0 +1,49 @@
+<?php
+namespace catchAdmin\cms\model\events;
+
+use catchAdmin\cms\model\Banners;
+
+trait BannersEvent
+{
+    /**
+     * 插入前
+     *
+     * @time 2021年05月21日
+     * @param Banners $model
+     * @return void
+     */
+    public static function onBeforeInsert(Banners $model)
+    {
+        self::beforeChangeData($model);
+    }
+
+
+    /**
+     *
+     * @auth CatchAdmin
+     * @time 2021年05月22日
+     * @param Banners $model
+     * @return void
+     */
+    public static function onBeforeUpdate(Banners $model)
+    {
+        self::beforeChangeData($model);
+    }
+
+    /**
+     * 插入前
+     *
+     * @auth CatchAdmin
+     * @time 2021年05月22日
+     * @param $model
+     * @return void
+     */
+    protected static function beforeChangeData($model)
+    {
+        $data = $model->getData();
+
+        if (isset($data['category_id'])) {
+            $model->category_id = $model->category_id[count($model->category_id) - 1];
+        }
+    }
+}