优化数据导出超时问题

app/Admin/Extensions/Exporter/StudentExporter.php

@@ -4,8 +4,10 @@
 namespace App\Admin\Extensions\Exporter;
 
 
+use App\Models\SecondaryCollege;
 use App\Models\Speciality;
 use Dcat\Admin\Grid\Exporters\AbstractExporter;
+use Illuminate\Support\Facades\Cache;
 use Maatwebsite\Excel\Concerns\Exportable;
 use Maatwebsite\Excel\Concerns\FromCollection;
 use Maatwebsite\Excel\Concerns\WithHeadings;
@@ -75,16 +77,35 @@ class StudentExporter extends AbstractExporter implements WithMapping, WithHeadi
 
     public function getSpecialityAndCollegeNameById($id)
     {
-        $nameInfo = Speciality::query()->where("speciality.id", $id)->leftJoin("secondary_college as b", "speciality.secondary_college_id", "=", "b.id")->first();
 
-        if(empty($nameInfo)){
-            return [
-                "name" => "",
-                "speciality_name" => ""
-            ];
-        }
+        $value = Cache::store('file')->remember('specialityInfo', 600, function () {
+            //所有专业
+            $specialityList = Speciality::query()->get(["id", "speciality_name", "secondary_college_id"])->toArray();
+            if(!empty($specialityList)){
+
+                //所有学院
+                $secondaryCollegeList = SecondaryCollege::query()->get(["id", "name"])->toArray();
+                if(!empty($secondaryCollegeList)){
+                    $secondaryCollegeList = array_column($secondaryCollegeList, null, "id");
+                    foreach($specialityList as $key => $item){
+                        if(array_key_exists($item["secondary_college_id"], $secondaryCollegeList)){
+                            $specialityList[$key]["name"] = $secondaryCollegeList[$item['secondary_college_id']]['name'];
+                        }else{
+                            $specialityList[$key]["name"] = "";
+                        }
+                    }
+                }
+
+                return array_column($specialityList, null, "id");
+            }
+        });
+
+
+        return [
+            "name" => $value[$id]["name"],
+            "speciality_name" => $value[$id]["speciality_name"]
+        ];
 
-       return $nameInfo->toArray();
     }
 
 }