From 3ff45b7c470758f8c7c654eca745c493172ee4d3 Mon Sep 17 00:00:00 2001
From: sapmentors <gregor.wolf@gmail.com>
Date: Mon, 10 Oct 2016 18:57:45 +0200
Subject: [PATCH] Number of participants that where checked in #23

---
 .../procedures/ParticipantNumbersRead.hdbview | 30 +++++++++++++++++++
 odataorganizer/service.xsodata                | 11 ++++++-
 2 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 odataorganizer/procedures/ParticipantNumbersRead.hdbview

diff --git a/odataorganizer/procedures/ParticipantNumbersRead.hdbview b/odataorganizer/procedures/ParticipantNumbersRead.hdbview
new file mode 100644
index 0000000..8a0827a
--- /dev/null
+++ b/odataorganizer/procedures/ParticipantNumbersRead.hdbview
@@ -0,0 +1,30 @@
+//
+//   Copyright 2016 SAP Mentors
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
+//
+// Thanks to the Blog: OData read exits - a delightful solution
+// http://scn.sap.com/community/developer-center/hana/blog/2016/01/14/odata-read-exits--an-ingenious-solution
+//
+schema = "SITREG";
+query = "SELECT \"Event\".\"ID\" AS \"EventID\", 
+        CAST( IFNULL (\"Ticket\".\"Participated\", 0) AS Integer ) AS \"Participated\"
+        FROM \"SITREG\".\"com.sap.sapmentors.sitreg.data::SITreg.Event\" AS \"Event\"
+        LEFT OUTER JOIN ( 
+            SELECT \"EventID\", COUNT(*) AS \"Participated\" 
+              FROM \"SITREG\".\"com.sap.sapmentors.sitreg.data::SITreg.Ticket\"
+              WHERE \"TicketUsed\" = 'Y' OR \"TicketUsed\" = 'M'
+              GROUP BY \"EventID\" ) AS \"Ticket\"
+          ON \"Event\".\"ID\" = \"Ticket\".\"EventID\"
+        GROUP BY \"Ticket\".\"Participated\", \"Event\".\"ID\";";
diff --git a/odataorganizer/service.xsodata b/odataorganizer/service.xsodata
index 05ff13a..6b82446 100644
--- a/odataorganizer/service.xsodata
+++ b/odataorganizer/service.xsodata
@@ -24,7 +24,8 @@ service  {
         "Events_Devices"       as "Devices",
         "Event_Changeable"          as "EventChangeable", 
         "Event_RegistrationNumbers" as "RegistrationNumbers",
-        "Event_PrePostEveningEventNumbers" as "PrePostEveningEventNumbers"
+        "Event_PrePostEveningEventNumbers" as "PrePostEveningEventNumbers",
+        "Event_ParticipantNumbers" as "ParticipantNumbers"
     )
     create using "com.sap.sapmentors.sitreg.odataorganizer.procedures::EventCreate" 
     update using "com.sap.sapmentors.sitreg.odataorganizer.procedures::EventUpdate"
@@ -80,6 +81,14 @@ service  {
     association "Event_PrePostEveningEventNumbers" principal "Events"("ID") multiplicity "1"
         dependent "PrePostEveningEventNumbers"("EventID") multiplicity "1";
 
+    "com.sap.sapmentors.sitreg.odataorganizer.procedures::ParticipantNumbersRead" as "ParticipantNumbers" key ("EventID")
+    create forbidden
+    update forbidden
+    delete forbidden;
+
+    association "Event_ParticipantNumbers" principal "Events"("ID") multiplicity "1"
+        dependent "ParticipantNumbers"("EventID") multiplicity "1";
+
     // Read Ticket from View to restrict fields that can be read
     "com.sap.sapmentors.sitreg.odatareceptionist.procedures::TicketRead" as "Ticket" key ("ParticipantID")
     create forbidden