diff --git a/database/migrations/2023_01_19_021809_set_progress_nullable_to_tasks_table.php b/database/migrations/2023_01_19_021809_set_progress_nullable_to_tasks_table.php
new file mode 100644
index 0000000..11ae0fc
--- /dev/null
+++ b/database/migrations/2023_01_19_021809_set_progress_nullable_to_tasks_table.php
@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up(): void
+    {
+        // 坏，为什么得这么写
+        Schema::table('tasks', function (Blueprint $table) {
+            $table->dropColumn('progress');
+        });
+
+        Schema::table('tasks', function (Blueprint $table) {
+            $table->unsignedTinyInteger('progress')->nullable()->after('title');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down(): void
+    {
+        Schema::table('tasks', function (Blueprint $table) {
+            $table->dropColumn('progress');
+        });
+
+        Schema::table('tasks', function (Blueprint $table) {
+            $table->integer('progress')->after('title');
+        });
+    }
+};