get pages from file if no longer in item.info

oml/settings.py

@@ -101,4 +101,4 @@ USER_AGENT = 'OpenMediaLibrary/%s' % VERSION
 
 DEBUG_HTTP = server.get('debug_http', False)
 
-DB_VERSION = 2
+DB_VERSION = 3

oml/update.py

@@ -299,6 +299,8 @@ class Update(Thread):
                 db_version = migrate_1()
             if db_version < 2:
                 db_version = migrate_2()
+            if db_version < 3:
+                db_version = migrate_3()
             settings.server['db_version'] = settings.DB_VERSION
 
     def run(self):
@@ -332,3 +334,24 @@ def migrate_2():
             s.item.update_sort()
         session.commit()
     return 2
+
+def migrate_3():
+    with db.session():
+        import item.models
+        for i in item.models.Item.find({
+            'query': {
+                'conditions': [{
+                    'key':'mediastate',
+                    'value':'available',
+                    'operator': '=='
+                }]
+            }
+        }):
+            if not i.files.all():
+                i.remove_file()
+            else:
+                f = i.files.all()[0]
+                if not 'pages' in i.info and 'pages' in f.info:
+                    i.info['pages'] = f.info['pages']
+                    i.save()
+    return 3