update

app/Http/Controllers/Admin/OtherController.php

@@ -66,9 +66,10 @@ class OtherController extends CommonController
             'total' => User::count() - collect($industryTotal)->sum('total')
         ];
         // 课程统计
-        $courseTypes = CourseType::where('is_chart',1)->get();
+        $courseTypes = CourseType::where('is_chart', 1)->get();
         foreach ($courseTypes as $courseType) {
-            $courseType->course_signs_total = CourseSign::whereIn('course_id', $courseType->courses->pluck('id'))
+            $courseIds = Course::where('type', $courseType->id)->pluck('id');
+            $courseType->course_signs_total = CourseSign::whereIn('course_id', $courseIds)
                 ->where('status', 1)
                 ->count();
         }