update

app/Console/Commands/AutoSchoolmate.php

@@ -70,8 +70,12 @@ class AutoSchoolmate extends Command
             }
 
             // 只更新还不是校友的学员，避免重复处理
+            // 注意：is_schoolmate != 1 不会匹配 NULL 值，需要显式包含 NULL
             $updated = User::whereIn('id', $courseSigns->pluck('user_id'))
-               // ->where('is_schoolmate', '!=', 1)
+                ->where(function ($query) {
+                    $query->where('is_schoolmate', '!=', 1)
+                        ->orWhereNull('is_schoolmate');
+                })
                 //->where('is_black',0)
                 ->update(['is_schoolmate' => 1]);