Use auto_now_add for the lock_manager app

docs/releases/1.1.rst

@@ -59,6 +59,7 @@ Next upgrade/add the new requirements::
 Migrate existing database schema with::
 
     $ mayan-edms.py migrate dynamic_search 0001 --fake
+    $ mayan-edms.py migrate lock_manager 0001 --fake
     $ mayan-edms.py migrate tags 0001 --fake
     $ mayan-edms.py migrate
 

mayan/apps/lock_manager/migrations/0001_initial.py

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+from south.utils import datetime_utils as datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        # Adding model 'Lock'
+        db.create_table(u'lock_manager_lock', (
+            (u'id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
+            ('creation_datetime', self.gf('django.db.models.fields.DateTimeField')()),
+            ('timeout', self.gf('django.db.models.fields.IntegerField')(default=30)),
+            ('name', self.gf('django.db.models.fields.CharField')(unique=True, max_length=48)),
+        ))
+        db.send_create_signal(u'lock_manager', ['Lock'])
+
+
+    def backwards(self, orm):
+        # Deleting model 'Lock'
+        db.delete_table(u'lock_manager_lock')
+
+
+    models = {
+        u'lock_manager.lock': {
+            'Meta': {'object_name': 'Lock'},
+            'creation_datetime': ('django.db.models.fields.DateTimeField', [], {}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '48'}),
+            'timeout': ('django.db.models.fields.IntegerField', [], {'default': '30'})
+        }
+    }
+
+    complete_apps = ['lock_manager']

mayan/apps/lock_manager/migrations/0002_auto__chg_field_lock_creation_datetime.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+from south.utils import datetime_utils as datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+
+        # Changing field 'Lock.creation_datetime'
+        db.alter_column(u'lock_manager_lock', 'creation_datetime', self.gf('django.db.models.fields.DateTimeField')(auto_now_add=True))
+
+    def backwards(self, orm):
+
+        # Changing field 'Lock.creation_datetime'
+        db.alter_column(u'lock_manager_lock', 'creation_datetime', self.gf('django.db.models.fields.DateTimeField')())
+
+    models = {
+        u'lock_manager.lock': {
+            'Meta': {'object_name': 'Lock'},
+            'creation_datetime': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
+            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '48'}),
+            'timeout': ('django.db.models.fields.IntegerField', [], {'default': '30'})
+        }
+    }
+
+    complete_apps = ['lock_manager']

mayan/apps/lock_manager/models.py

@@ -2,14 +2,13 @@ from __future__ import absolute_import
 
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
-from django.utils.timezone import now
 
 from .managers import LockManager
 from .settings import DEFAULT_LOCK_TIMEOUT
 
 
 class Lock(models.Model):
-    creation_datetime = models.DateTimeField(verbose_name=_(u'Creation datetime'))
+    creation_datetime = models.DateTimeField(verbose_name=_(u'Creation datetime'), auto_now_add=True)
     timeout = models.IntegerField(default=DEFAULT_LOCK_TIMEOUT, verbose_name=_(u'Timeout'))
     name = models.CharField(max_length=48, verbose_name=_(u'Name'), unique=True)
 
@@ -19,7 +18,6 @@ class Lock(models.Model):
         return self.name
 
     def save(self, *args, **kwargs):
-        self.creation_datetime = now()
         if not self.timeout and not kwargs.get('timeout'):
             self.timeout = DEFAULT_LOCK_TIMEOUT