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Refactored loader to be class based only.

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This commit is contained in:
Jannis Leidel 2011-07-01 15:44:23 +02:00
parent a40204def7
commit 2804cd527f
1 changed files with 28 additions and 44 deletions
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72
dbtemplates/loader.py
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@ -1,14 +1,13 @@
import warnings
from django import VERSION
from django.conf import settings
from django.contrib.sites.models import Site
from django.template import TemplateDoesNotExist
from dbtemplates.conf import settings
from dbtemplates.models import Template
from dbtemplates.utils import cache, get_cache_key
from dbtemplates.utils.cache import cache, get_cache_key, set_and_return
from django.template.loader import BaseLoader
def load_template_source(template_name, template_dirs=None, annoy=True):
class Loader(BaseLoader):
"""
A custom template loader to load templates from the database.
@ -17,43 +16,28 @@ def load_template_source(template_name, template_dirs=None, annoy=True):
it falls back to query the database field ``name`` with the template path
and ``sites`` with the current site.
"""
if VERSION[:2] >= (1, 2) and annoy:
# For backward compatibility
warnings.warn(
"`dbtemplates.loader.load_template_source` is deprecated; "
"use `dbtemplates.loader.Loader` instead.", DeprecationWarning)
site = Site.objects.get_current()
display_name = 'db:%s:%s:%s' % (settings.DATABASE_ENGINE,
template_name, site.domain)
cache_key = get_cache_key(template_name)
if cache:
try:
backend_template = cache.get(cache_key)
if backend_template:
return backend_template, template_name
except:
pass
try:
template = Template.on_site.filter(name__exact=template_name)[0]
# Save in cache backend explicitly if manually deleted or invalidated
is_usable = True
def load_template_source(self, template_name, template_dirs=None):
site = Site.objects.get_current()
display_name = 'dbtemplates:%s:%s:%s' % (settings.DATABASE_ENGINE,
template_name, site.domain)
cache_key = get_cache_key(template_name)
if cache:
cache.set(cache_key, template.content)
return (template.content, display_name)
except:
pass
raise TemplateDoesNotExist(template_name)
load_template_source.is_usable = True
if VERSION[:2] >= (1, 2):
# providing a class based loader for Django >= 1.2, yay!
from django.template.loader import BaseLoader
class Loader(BaseLoader):
__doc__ = load_template_source.__doc__
is_usable = True
def load_template_source(self, template_name, template_dirs=None):
return load_template_source(
template_name, template_dirs, annoy=False)
try:
backend_template = cache.get(cache_key)
if backend_template:
return backend_template, template_name
except:
pass
try:
template = Template.objects.get(name__exact=template_name)
return set_and_return(template.content, display_name)
except (Template.MultipleObjectsReturned, Template.DoesNotExist):
try:
template = Template.objects.get(
name__exact=template_name, sites__in=[site.id])
return set_and_return(template.content, display_name)
except Template.DoesNotExist:
pass
raise TemplateDoesNotExist(template_name)