toaster: Toaster GUI, generic search, filter and order

This patch implements table searching, filtering and ordering, in a
generic mode reusable for all tables.

The search operates list of fields defined in the corresponding
class for each model, search_allowed_fields.

The search expression and filters are sent through GET requests
using a QuerySet-like input. The inputs are filtered and
validated before usage to prevent inadvertent or malicious use.

Filters and table headers are defined in the views for each table,
and rendered by generic code which is easily modified for various
tables.

The Build table and Configuration table are implemented using this
framework as an example of how it should be used.

    [YOCTO #4249]
    [YOCTO #4254]
    [YOCTO #4255]
    [YOCTO #4256]
    [YOCTO #4257]
    [YOCTO #4259]
    [YOCTO #4260]

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/lib/toaster/toastergui/templatetags/projecttags.py b/lib/toaster/toastergui/templatetags/projecttags.py
index 145502675..15a1757b3 100644
--- a/lib/toaster/toastergui/templatetags/projecttags.py
+++ b/lib/toaster/toastergui/templatetags/projecttags.py
@@ -16,8 +16,9 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-from datetime import datetime
+from datetime import datetime, timedelta
 from django import template
+from django.utils import timezone
 
 register = template.Library()
 
@@ -42,8 +43,14 @@ def query(qs, **kwargs):
 
 @register.filter
 def divide(value, arg):
+    if int(arg) == 0:
+        return -1
     return int(value) / int(arg)
 
 @register.filter
 def multiply(value, arg):
     return int(value) * int(arg)
+
+@register.assignment_tag
+def datecompute(delta, start = timezone.now()):
+    return start + timedelta(delta)