Fix swagger data struct error

Signed-off-by: Asai Neko <sugar@sne.moe>

service/service_event/checkin.go

@@ -20,11 +20,13 @@ type CheckinPayload struct {
 	Data    *CheckinData
 }
 
+type CheckinResponse struct {
+	CheckinCode *string `json:"checkin_code"`
+}
+
 type CheckinResult struct {
 	Common shared.CommonResult
-	Data   *struct {
-		CheckinCode *string `json:"checkin_code"`
-	}
+	Data   *CheckinResponse
 }
 
 func (self *EventServiceImpl) Checkin(payload *CheckinPayload) (result *CheckinResult) {
@@ -44,6 +46,7 @@ func (self *EventServiceImpl) Checkin(payload *CheckinPayload) (result *CheckinR
 					Throw(payload.Context),
 			},
 		}
+
 		return
 	}
 
@@ -58,10 +61,9 @@ func (self *EventServiceImpl) Checkin(payload *CheckinPayload) (result *CheckinR
 				SetOriginal(exception.CommonSuccess).
 				Throw(payload.Context),
 		},
-		Data: &struct {
-			CheckinCode *string `json:"checkin_code"`
-		}{code},
+		Data: &CheckinResponse{code},
 	}
+
 	return
 }
 
@@ -123,11 +125,13 @@ type CheckinQueryPayload struct {
 	Data    *CheckinQueryData
 }
 
+type CheckinQueryResponse struct {
+	CheckinAt *time.Time `json:"checkin_at"`
+}
+
 type CheckinQueryResult struct {
 	Common shared.CommonResult
-	Data   *struct {
-		CheckinAt *time.Time `json:"checkin_at"`
-	}
+	Data   *CheckinQueryResponse
 }
 
 func (self *EventServiceImpl) CheckinQuery(payload *CheckinQueryPayload) (result *CheckinQueryResult) {
@@ -183,9 +187,7 @@ func (self *EventServiceImpl) CheckinQuery(payload *CheckinQueryPayload) (result
 				SetOriginal(exception.CommonSuccess).
 				Throw(payload.Context),
 		},
-		Data: &struct {
-			CheckinAt *time.Time `json:"checkin_at"`
-		}{checkinAt},
+		Data: &CheckinQueryResponse{checkinAt},
 	}
 	return
 }