update

app/Http/Controllers/Admin/OtherController.php

@@ -275,7 +275,7 @@ class OtherController extends CommonController
         $list['company_market_after_enrollment_total'] = CourseSign::companyMarketAfterEnrollment($start_date, $end_date, $course_ids);
 
         // 累计被投企业数
-        $list['course_signs_invested'] = CourseSign::yhInvestedTotal(CourseType::START_DATE, $end_date);
+        $list['course_signs_invested'] = CourseSign::yhInvestedTotal($end_date);
 
         // 入学后被投企业数量（在指定时间范围内报名的学员所在公司中，在入学后被投的公司数量）
         $list['company_invested_after_enrollment_total'] = CourseSign::companyInvestedAfterEnrollment($start_date, $end_date, $course_ids);

app/Models/CourseSign.php

@@ -176,10 +176,10 @@ class CourseSign extends SoftDeletesModel
      * @param array|null $course_ids 课程ID（仅在自定义时间时生效）
      * @param bool $retList 是否返回列表
      */
-    public static function yhInvestedTotal($start_date, $end_date = null, $retList = false)
+    public static function yhInvestedTotal($end_date = null, $retList = false)
     {
         // 默认时间：获取所有学员，不限制课程
-        $userIds = self::getStudentList($start_date, $end_date, 1, null)->get()->pluck('user_id');
+        $userIds = self::getStudentList(null, $end_date, 1, null)->get()->pluck('user_id');
 
         // 获取这些学员所在的被投企业
         $companies = Company::whereHas('users', function ($query) use ($userIds) {