diff --git a/rog/models.py b/rog/models.py
index 782c394..a3a7f1a 100644
--- a/rog/models.py
+++ b/rog/models.py
@@ -547,7 +547,7 @@ class GpsCheckin(models.Model):
         null=False,
         help_text="ゼッケン番号"
     )
-    event_id = models.TextField(
+    event_id = models.IntegerField(
         null=True,
         blank=True,
         help_text="イベントID"
diff --git a/rog/postgres_views.sql b/rog/postgres_views.sql
index 13e82fb..e96d184 100644
--- a/rog/postgres_views.sql
+++ b/rog/postgres_views.sql
@@ -6,6 +6,7 @@ DROP VIEW IF EXISTS v_checkin_summary CASCADE;
 -- チェックポイントの集計用ビュー
 CREATE VIEW v_checkin_summary AS
 SELECT 
+    event_id,
     event_code,
     zekken_number,          -- 文字列として保持
     COUNT(*) as total_checkins,
@@ -18,7 +19,7 @@ SELECT
 FROM 
     gps_checkins
 GROUP BY 
-    event_code, zekken_number;
+    event_id,event_code, zekken_number;
 
 -- カテゴリー内ランキング計算用ビュー
 CREATE VIEW v_category_rankings AS