def _render(self, context):
instance = self.instance.resolve(context)
field = self.field.resolve(context)
geometry = self.geometry.resolve(context)
options = {}
for key, expr in self.options:
noresolve = {u'True': True, u'False': False, u'None': None}
value = noresolve.get(unicode(expr), expr.resolve(context))
if key == 'options':
options.update(value)
else:
options[key] = value
if settings.THUMBNAIL_DUMMY:
thumbnail_url = DummyImageFile(geometry).url
elif getattr(instance, field):
thumbnail_url = THUMBNAIL_OPTIONS.build_url(instance, field, geometry, **options)
elif not self.direct_usage:
return self.nodelist_empty.render(context)
if self.direct_usage:
return thumbnail_url
else:
context.push()
context[self.as_var] = thumbnail_url
output = self.nodelist_file.render(context)
context.pop()
return output
def spawn_pre_cache_signal(sender, instance, created, **kwargs):
configs = THUMBNAIL_OPTIONS.get(sender, {})
for config in configs:
if config and config.precache:
precache_sorl.send(sender=sender, instance=instance,
model_config=config)