From ee8df55da3731b3c73939cb32844e6476f4cec27 Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Tue, 21 Jan 2014 12:33:38 -0500
Subject: [PATCH] Add a unique xml_file_id to Injuries.

---
 src/TSN/XML/Injuries.hs | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/src/TSN/XML/Injuries.hs b/src/TSN/XML/Injuries.hs
index 4ef0154..6cc802f 100644
--- a/src/TSN/XML/Injuries.hs
+++ b/src/TSN/XML/Injuries.hs
@@ -63,6 +63,13 @@ import Xml (
   pickle_unpickle,
   unpickleable )
 
+
+--
+-- DB/XML Data types
+--
+
+-- * InjuriesTeam
+
 -- | XML/Database representation of a team as they appear in the
 --   injuries documents.
 --
@@ -73,6 +80,8 @@ data InjuriesTeam =
   deriving (Data, Eq, Show, Typeable)
 
 
+-- * InjuriesListing/InjuriesListingXml
+
 -- | XML/Database representation of the injury listings.
 --
 data InjuriesListingXml =
@@ -115,6 +124,9 @@ instance FromXmlFk InjuriesListingXml where
 
 instance XmlImportFk InjuriesListingXml
 
+
+-- * Injuries/Message
+
 -- | XML representation of an injuriesxml \<message\>.
 --
 data Message =
@@ -132,6 +144,7 @@ data Message =
 --
 data Injuries =
   Injuries {
+    db_xml_file_id :: Int,
     db_sport :: String,
     db_time_stamp :: UTCTime }
 
@@ -145,12 +158,17 @@ instance FromXml Message where
   --
   from_xml Message{..} =
     Injuries {
+      db_xml_file_id = xml_xml_file_id,
       db_sport = xml_sport,
       db_time_stamp = xml_time_stamp }
 
 instance XmlImport Message
 
 
+--
+-- Database code
+--
+
 instance DbImport Message where
   dbmigrate _ =
     run_dbmigrate $ do
@@ -171,6 +189,13 @@ instance DbImport Message where
 
 mkPersist tsn_codegen_config [groundhog|
 - entity: Injuries
+  constructors:
+    - name: Injuries
+      uniques:
+        - name: unique_injuries
+          type: constraint
+          # Prevent multiple imports of the same message.
+          fields: [db_xml_file_id]
 
 - entity: InjuriesListing
   dbName: injuries_listings
@@ -192,6 +217,11 @@ mkPersist tsn_codegen_config [groundhog|
 |]
 
 
+--
+-- XML Picklers
+--
+
+
 -- | A pickler for 'InjuriesTeam's that can convert them to/from XML.
 --
 pickle_injuries_team :: PU InjuriesTeam
@@ -204,7 +234,8 @@ pickle_injuries_team =
     to_tuple m = (db_team_name m, db_team_league m)
 
 
--- | A pickler for 'InjuriesListingXml's that can convert them to/from XML.
+-- | A pickler for 'InjuriesListingXml's that can convert them to/from
+--   XML.
 --
 pickle_listing :: PU InjuriesListingXml
 pickle_listing =
-- 
2.44.2