def _setConnectionName(self, name):
self._connectionName = name
cache = getCacheForObject(self)
location = getLocationForCache(self)
if cache and location:
cache.invalidate(location)
def invalidate(self):
"Invalidate the current cached value."
cache = getCacheForObject(self.context)
location = getLocationForCache(self.context)
if cache and location:
cache.invalidate(location)
return self.form(message=_("cache-invalidated", u"Invalidated."))
else:
return self.form(message=_("no-cache-associated",
u"No cache associated with object."))
def __call__(self, **kw):
"""See zope.app.rdb.interfaces"""
# Try to resolve arguments
arg_values = {}
missing = []
for name in self._arguments.keys():
name = name.encode('UTF-8')
try:
# Try to find argument in keywords
arg_values[name] = kw[name]
except KeyError:
# Okay, the first try failed, so let's try to find the default
arg = self._arguments[name]
try:
arg_values[name] = arg['default']
except KeyError:
# Now the argument might be optional anyways; let's check
try:
if not arg['optional']:
missing.append(name)
except KeyError:
missing.append(name)
try:
connection = self.getConnection()
except KeyError:
raise AttributeError("The database connection '%s' cannot be "
"found." % (self.connectionName))
query = apply(self.template, (), arg_values)
cache = getCacheForObject(self)
location = getLocationForCache(self)
if cache and location:
_marker = object()
result = cache.query(location, {'query': query}, default=_marker)
if result is not _marker:
return result
result = queryForResults(connection, query)
if cache and location:
cache.set(result, location, {'query': query})
return result
def testGetLocationForCache(self):
obj = ObjectStub()
self.assertEqual(getLocationForCache(obj), '/cached-object')
