update

app/Http/Controllers/Admin/EmailTemplateController.php

@@ -147,7 +147,7 @@ class EmailTemplateController extends BaseController
         if ($validator->fails()) {
             return $this->fail([ResponseCode::ERROR_PARAMETER, implode(',', $validator->errors()->all())]);
         }
-        $detail = $this->model->find($all['id']);
+        $detail = $this->model->withCount('emailRecords')->find($all['id']);
         return $this->success($detail);
     }
 

app/Models/EmailTemplate.php

@@ -9,5 +9,10 @@ use Illuminate\Support\Facades\Cache;
 class EmailTemplate extends SoftDeletesModel
 {
 
+    public function emailRecords()
+    {
+        return $this->hasMany(EmailRecord::class, 'email_template_id', 'id');
+    }
+
 }