perf: 优化撤回消息

database/migrations/2022_01_29_125829_web_socket_dialog_msgs_add_deletes.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class WebSocketDialogMsgsAddDeletes extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('web_socket_dialog_msgs', function (Blueprint $table) {
+            if (!Schema::hasColumn('web_socket_dialog_msgs', 'deleted_at')) {
+                $table->softDeletes();
+            }
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('web_socket_dialog_msgs', function (Blueprint $table) {
+            $table->dropSoftDeletes();
+        });
+    }
+}