update

app/Models/User.php

@@ -183,7 +183,40 @@ class User extends Authenticatable implements Auditable
     public static function updateNo($userId)
     {
         $user = self::find($userId);
-        $no = date('Ymd', strtotime($user->created_at)) . str_pad($userId, 6, '0', STR_PAD_LEFT);
+        if (!empty($user->no)) {
+            return false;
+        }
+        // 获取最早一条审核通过的报名数据
+        $courseSigns = CourseSign::with('course')
+            ->where('user_id', $userId)
+            ->where('status', 1)
+            ->orderBy('created_at', 'asc')
+            ->first();
+        if (empty($courseSigns)) {
+            return false;
+        }
+        if (empty($courseSigns->course->start_time)) {
+            return false;
+        }
+        // 编号前缀
+        $prifix = date('Ymd', strtotime($courseSigns->course->start_time));
+        // 获取同一天开始的所有课程
+        $course = Course::where('start_time', $courseSigns->course->start_time)->orderBy('created_at', 'asc')->get();
+        // 获取同一天开始所有课程的报名信息
+        $courseSigns = CourseSign::whereIn('id', function ($query) use ($course) {
+            $query->from('course_signs')
+                ->where('status', 1)
+                ->whereIn('course_id', $course->pluck('id'))
+                ->selectRaw('MIN(id)')
+                ->groupBy('user_id');
+        })->whereHas('user', function ($query) {
+            $query->whereNull('no');
+        })->orderBy('created_at', 'asc')->get();
+        // 获取当前用户id在$courseSigns中第几位
+        $index = $courseSigns->search(function ($item) use ($user) {
+            return $item->user_id == $user->id;
+        });
+        $no = $prifix . str_pad($index, 3, '0', STR_PAD_LEFT);
         $user->no = $no;
         $user->save();
         return $user->no;

database/migrations/2025_06_19_105447_alert_users_table.php

@@ -4,8 +4,7 @@ use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
 
-return new class extends Migration
-{
+return new class extends Migration {
     /**
      * Run the migrations.
      *
@@ -16,6 +15,8 @@ return new class extends Migration
         Schema::table('users', function (Blueprint $table) {
             $table->string('no')->nullable()->comment('学号');
             $table->date('birthday')->nullable()->comment('生日')->change();
+            // no字段唯一索引
+            $table->unique('no');
         });
     }