def determine_default_value(field, container):
"""Determine a field's default value during object creation.
"""
# We deliberately ignore form level defaults here.
# zope.schema defaultFactory
#
# Based on zope.schema._boostrapfields.DefaultProperty. We don't use
# the class level 'default' attribute, which is a DefaultProperty,
# because we want to be able to distinguish "default of None" and
# "no default", at least for the defaultFactory. That's why it's
# necessary to check in the instance dict for a defaultFactory first,
# instead of letting the DefaultProperty implementation handle it.
default_factory = field.__dict__.get('defaultFactory')
if default_factory is not None:
if IContextAwareDefaultFactory.providedBy(default_factory):
# Access DefaultProperty descriptor to trigger validation
field.bind(container).default
return default_factory(container)
else:
# Access DefaultProperty descriptor to trigger validation
field.default
return default_factory()
field_default = field.__dict__.get('default')
if field_default is not None:
# Access DefaultProperty descriptor to trigger validation
field.default
return field_default
return NO_DEFAULT_MARKER
def determine_default_value(field, container):
"""Determine a field's default value during object creation.
"""
# We deliberately ignore form level defaults here.
# zope.schema defaultFactory
#
# Based on zope.schema._boostrapfields.DefaultProperty. We don't use
# the class level 'default' attribute, which is a DefaultProperty,
# because we want to be able to distinguish "default of None" and
# "no default", at least for the defaultFactory. That's why it's
# necessary to check in the instance dict for a defaultFactory first,
# instead of letting the DefaultProperty implementation handle it.
default_factory = field.__dict__.get('defaultFactory')
if default_factory is not None:
if IContextAwareDefaultFactory.providedBy(default_factory):
# Access DefaultProperty descriptor to trigger validation
field.bind(container).default
return default_factory(container)
else:
# Access DefaultProperty descriptor to trigger validation
field.default
return default_factory()
field_default = field.__dict__.get('default')
if field_default is not None:
# Access DefaultProperty descriptor to trigger validation
field.default
return field_default
return NO_DEFAULT_MARKER
def burnDefaultValues(ob, event):
schema = load_schema(
aq_base(ob).schema,
cache_key=aq_base(ob).schema_digest,
)
for name in schema.names():
field = schema[name]
try:
factory = field.defaultFactory
except AttributeError:
factory = None
try:
default = field.default
except AttributeError:
default = None
if not (factory or default):
continue
bound = field.bind(ob)
try:
value = bound.get(ob)
except AttributeError:
value = None
if value:
continue
if factory:
if IContextAwareDefaultFactory.providedBy(factory):
value = factory(ob)
else:
value = factory()
else:
value = deepcopy(default)
if value:
bound.set(ob, value)
set_contained(value, name, ob)
def register_interface(self, iface, omit=(), prefix=None):
proxy = RecordsProxy(self, iface, prefix)
for name in iface.names():
if name in omit:
continue
field = iface[name]
if field.defaultFactory is not None:
if IContextAwareDefaultFactory.providedBy(field.defaultFactory): # noqa
setattr(proxy, name, field.defaultFactory(self))
else:
setattr(proxy, name, field.defaultFactory())
elif field.default is not None:
setattr(proxy, name, field.default)
def register_interface(self, iface, omit=(), prefix=None):
proxy = RecordsProxy(self, iface, prefix)
for name in iface.names():
if name in omit:
continue
field = iface[name]
if field.defaultFactory is not None:
if IContextAwareDefaultFactory.providedBy(
field.defaultFactory): # noqa
setattr(proxy, name, field.defaultFactory(self))
else:
setattr(proxy, name, field.defaultFactory())
elif field.default is not None:
setattr(proxy, name, field.default)
def getDefaultValue(self, form):
if self.defaultFactory is not None:
if IContextAwareDefaultFactory.providedBy(self.defaultFactory):
default = self.defaultFactory(form.getContent())
else:
default = self.defaultFactory()
else:
default = super(BaseField, self).getDefaultValue(form)
if default is NO_VALUE:
default = self.defaultValue
if default is None:
return NO_VALUE
return default
def __get__(self, inst, owner):
name, check = self._info
defaultFactory = inst.__dict__.get('defaultFactory')
# If there is no default factory, simply return the default.
if defaultFactory is None:
return inst.__dict__[name]
# Get the default value by calling the factory. Some factories might
# require a context to produce a value.
if IContextAwareDefaultFactory.providedBy(defaultFactory):
value = defaultFactory(inst.context)
else:
value = defaultFactory()
# Check that the created value is valid.
if check is not None:
check(inst, value)
elif value != inst.missing_value:
inst.validate(value)
return value
def getDefaultValue(self, form):
if self.defaultFactory is not None:
if IContextAwareDefaultFactory.providedBy(self.defaultFactory):
if form is None:
raise TypeError('defaultFactory context required.')
default = self.defaultFactory(form.getContent())
else:
default = self.defaultFactory()
else:
default = super(Field, self).getDefaultValue(form)
if default is NO_VALUE:
default = self.defaultValue
if default is None:
return NO_VALUE
return default
def __get__(self, inst, owner):
name, check = self._info
defaultFactory = inst.__dict__.get('defaultFactory')
# If there is no default factory, simply return the default.
if defaultFactory is None:
return inst.__dict__[name]
# Get the default value by calling the factory. Some factories might
# require a context to produce a value.
if IContextAwareDefaultFactory.providedBy(defaultFactory):
value = defaultFactory(inst.context)
else:
value = defaultFactory()
# Check that the created value is valid.
if check is not None:
check(inst, value)
elif value != inst.missing_value:
inst.validate(value)
return value
def _interpolate(template, ob, request=None):
if request is None:
request = getRequest()
schema = load_schema(
aq_base(ob).schema,
cache_key=aq_base(ob).schema_digest,
)
mapping = {}
for name in schema.names():
field = schema[name]
bound = field.bind(ob)
try:
value = bound.get(ob)
except AttributeError:
value = ''
if not value:
try:
factory = field.defaultFactory
except AttributeError:
factory = None
if not factory:
continue
if IContextAwareDefaultFactory.providedBy(factory):
value = factory(ob)
else:
value = factory()
if not value:
mapping[name] = ''
continue
try:
mapping[name] = translate(
bound.vocabulary.getTerm(value).title,
context=request,
)
except (AttributeError, LookupError):
mapping[name] = value
interpolator = IStringInterpolator(ob)
value = interpolator(i18n_interpolate(template or u'', mapping))
return value
