From e5995a6423b8865a5cd9946c9506e9052db89dac Mon Sep 17 00:00:00 2001
From: j <j@mailb.org>
Date: Tue, 19 Jan 2016 11:43:57 +0530
Subject: [PATCH] migrate old isbn arrays again, fixes #193

---
 oml/settings.py |  2 +-
 oml/update.py   | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/oml/settings.py b/oml/settings.py
index aae47ed..23ac3e9 100644
--- a/oml/settings.py
+++ b/oml/settings.py
@@ -101,4 +101,4 @@ USER_AGENT = 'OpenMediaLibrary/%s' % VERSION
 
 DEBUG_HTTP = server.get('debug_http', False)
 
-DB_VERSION = 3
+DB_VERSION = 4
diff --git a/oml/update.py b/oml/update.py
index b3c4129..8cf0878 100644
--- a/oml/update.py
+++ b/oml/update.py
@@ -301,6 +301,8 @@ class Update(Thread):
                 db_version = migrate_2()
             if db_version < 3:
                 db_version = migrate_3()
+            if db_version < 4:
+                db_version = migrate_4()
             settings.server['db_version'] = settings.DB_VERSION
 
     def run(self):
@@ -355,3 +357,29 @@ def migrate_3():
                     i.info['pages'] = f.info['pages']
                     i.save()
     return 3
+
+def migrate_4():
+    with db.session() as session:
+        import item.models
+        from meta.utils import to_isbn13
+        for i in item.models.Item.query:
+            update = False
+            if 'isbn' in i.meta and isinstance(i.meta['isbn'], list):
+                isbns = [to_isbn13(isbn) for isbn in i.meta['isbn']]
+                isbns = [isbn for isbn in isbns if isbn]
+                if isbns:
+                    i.meta['isbn'] = isbns[0]
+                    if 'isbn' in i.info:
+                        i.info['isbn'] = i.meta['isbn']
+                else:
+                    del i.meta['isbn']
+                    if 'isbn' in i.info:
+                        del i.info['isbn']
+                update = True
+            if 'isbn' in i.meta and not i.meta['isbn']:
+                del i.meta['isbn']
+                update = True
+            if update:
+                session.add(i)
+        session.commit()
+    return 4