Simplyfied and updated the lock manager app

apps/lock_manager/models.py

@@ -10,17 +10,28 @@ from lock_manager.conf.settings import DEFAULT_LOCK_TIMEOUT
 class Lock(models.Model):
     creation_datetime = models.DateTimeField(verbose_name=_(u'creation datetime'))
     timeout = models.IntegerField(default=DEFAULT_LOCK_TIMEOUT, verbose_name=_(u'timeout'))
-    name = models.CharField(max_length=32, verbose_name=_(u'name'), unique=True)
-    
+    name = models.CharField(max_length=48, verbose_name=_(u'name'), unique=True)
+
     objects = LockManager()
-    
+
     def __unicode__(self):
         return self.name
-        
+
     def save(self, *args, **kwargs):
         self.creation_datetime = datetime.datetime.now()
+        if not self.timeout and not kwarget.get('timeout'):
+            self.timeout = DEFAULT_LOCK_TIMEOUT
+
         super(Lock, self).save(*args, **kwargs)
-        
+
+    def release(self):
+        try:
+            lock = Lock.objects.get(name=self.name, creation_datetime=self.creation_datetime)
+            lock.delete()
+        except Lock.DoesNotExist:
+            # Out lock expired and was reassigned
+            pass
+
     class Meta:
         verbose_name = _(u'lock')
         verbose_name_plural = _(u'locks')