New management command to clean logs.

fixes #320

modoboa/admin/app_settings.py

@@ -156,6 +156,12 @@ class GeneralParametersForm(parameters.AdminParametersForm):
 
     sep3 = SeparatorField(label=ugettext_lazy("Miscellaneous"))
 
+    log_maximum_age = forms.IntegerField(
+        label=ugettext_lazy("Maximum log record age"),
+        initial=365,
+        help_text=ugettext_lazy("The maximum age in days of a log record")
+    )
+
     items_per_page = forms.IntegerField(
         label=ugettext_lazy("Items per page"),
         initial=30,

modoboa/lib/management/commands/cleanlogs.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+# coding: utf-8
+
+import datetime
+from optparse import make_option
+from django.core.management.base import BaseCommand
+from django.utils import timezone
+from modoboa.lib import parameters
+from modoboa.lib.models import Log
+from modoboa.admin import AdminConsole
+
+
+class Command(BaseCommand):
+    args = ''
+    help = 'Log table cleanup'
+
+    option_list = BaseCommand.option_list + (
+        make_option('--debug',
+                    action='store_true',
+                    default=False,
+                    help='Activate debug output'),
+        make_option('--verbose',
+                    action='store_true',
+                    default=False,
+                    help='Display informational messages')
+    )
+
+    def __vprint(self, msg):
+        if not self.verbose:
+            return
+        print msg
+
+    def handle(self, *args, **options):
+        if options["debug"]:
+            import logging
+            l = logging.getLogger("django.db.backends")
+            l.setLevel(logging.DEBUG)
+            l.addHandler(logging.StreamHandler())
+        self.verbose = options["verbose"]
+
+        AdminConsole().load()
+        log_maximum_age = int(parameters.get_admin("LOG_MAXIMUM_AGE", app="admin"))
+        self.__vprint("Deleting logs older than %d days..." % log_maximum_age)
+        limit = timezone.now() - datetime.timedelta(log_maximum_age)
+        Log.objects.filter(date_created__lt=limit).delete()
+        self.__vprint("Done.")