def assert_value_persisted(self, field, initial_default, new_default,
browser=None):
"""Create an object (by delegating to add_object() implemented by the
specific testcase) and assert that a field's default value will
actually be persisted on the object after creation.
We do this by
- first patching the field's defaultFactory to return a known value
- creating the object using that default
- modifiying the defaultFactory to return a different default
- checking that the field value on the object didn't also change
"""
# We're using the defaultFactory here to be able to distinguish
# a default of `None` from "no default"
with TempMonkeyPatch(field, 'defaultFactory', lambda: initial_default):
obj = self.add_object(browser)
initial_value = field.get(field.interface(obj))
with TempMonkeyPatch(field, 'defaultFactory', lambda: new_default):
current_value = field.get(field.interface(obj))
self.assertEqual(
initial_value, current_value,
'Value %r should have been persisted, got %r instead' % (
initial_value, current_value))
# In addition to asserting initial_value == current_value, also check
# persistence using our own helper function which should raise an
# AttributeError if no value has been persisted.
persisted_value = get_persisted_value_for_field(obj, field)
self.assertEqual(persisted_value, current_value)
def update_field(self, obj, field, item):
if field.readonly:
return
name = field.getName()
value = self.get_value_from_pipeline(field, item)
if value is not _tm_marker:
field.set(field.interface(obj), value)
return
# Get the field's current value, if it has one then leave it alone
try:
value = get_persisted_value_for_field(obj, field)
except AttributeError:
value = NO_VALUE
# Fix default description to be an empty unicode instead of
# an empty bytestring because of this bug:
# https://github.com/plone/plone.dexterity/pull/33
if name == 'description' and value == '':
field.set(field.interface(obj), u'')
return
if not (value is field.missing_value or value is NO_VALUE):
return
# Finally, set a default value if nothing is set so far
default = self.determine_default_value(obj, field)
field.set(field.interface(obj), default)
def update_field(self, obj, field, item):
if field.readonly:
return
name = field.getName()
value = self.get_value_from_pipeline(field, item)
if value is not _tm_marker:
field.set(field.interface(obj), value)
return
# Get the field's current value, if it has one then leave it alone
try:
value = get_persisted_value_for_field(obj, field)
except AttributeError:
value = NO_VALUE
# Fix default description to be an empty unicode instead of
# an empty bytestring because of this bug:
# https://github.com/plone/plone.dexterity/pull/33
if name == 'description' and value == '':
field.set(field.interface(obj), u'')
return
if not(value is field.missing_value or value is NO_VALUE):
return
# Finally, set a default value if nothing is set so far
default = self.determine_default_value(obj, field)
field.set(field.interface(obj), default)
def assert_value_persisted(self,
field,
initial_default,
new_default,
browser=None):
"""Create an object (by delegating to add_object() implemented by the
specific testcase) and assert that a field's default value will
actually be persisted on the object after creation.
We do this by
- first patching the field's defaultFactory to return a known value
- creating the object using that default
- modifiying the defaultFactory to return a different default
- checking that the field value on the object didn't also change
"""
# We're using the defaultFactory here to be able to distinguish
# a default of `None` from "no default"
with TempMonkeyPatch(field, 'defaultFactory', lambda: initial_default):
obj = self.add_object(browser)
initial_value = field.get(field.interface(obj))
with TempMonkeyPatch(field, 'defaultFactory', lambda: new_default):
current_value = field.get(field.interface(obj))
self.assertEqual(
initial_value, current_value,
'Value %r should have been persisted, got %r instead' %
(initial_value, current_value))
# In addition to asserting initial_value == current_value, also check
# persistence using our own helper function which should raise an
# AttributeError if no value has been persisted.
persisted_value = get_persisted_value_for_field(obj, field)
self.assertEqual(persisted_value, current_value)
def changedField(field, value, context=None):
"""Figure if a field's value changed
Comparing the value of the context attribute and the given value"""
if context is None:
context = field.context
if context is None:
# IObjectWidget madness
return True
if zope.schema.interfaces.IObject.providedBy(field):
return True
if not IPersistent.providedBy(context):
# Field is not persisted, delegate to original implementation
# Could be a z3c.formwidget QueryContex or an AQ wrapped dict
# instance from Plone's TTW registry editor.
assert any((
isinstance(context, QueryContext),
isinstance(context, RecordsProxy),
isinstance(context, ImplicitAcquisitionWrapper)
and isinstance(aq_base(context), dict),
))
return original_changedField(field, value, context)
dm = zope.component.getMultiAdapter((context, field),
interfaces.IDataManager)
if not dm.canAccess():
# Can't get the original value, assume it changed
return True
# Determine the original value
# Use a helper method that actually returns the persisted value,
# *without* triggering any fallbacks to default values or
# missing values.
try:
stored_value = get_persisted_value_for_field(context, field)
except AttributeError:
return True
if stored_value != value:
return True
return False
def changedField(field, value, context=None):
"""Figure if a field's value changed
Comparing the value of the context attribute and the given value"""
if context is None:
context = field.context
if context is None:
# IObjectWidget madness
return True
if zope.schema.interfaces.IObject.providedBy(field):
return True
if not IPersistent.providedBy(context):
# Field is not persisted, delegate to original implementation
# Could be a z3c.formwidget QueryContex or an AQ wrapped dict
# instance from Plone's TTW registry editor.
assert any((
isinstance(context, QueryContext),
isinstance(context, RecordsProxy),
isinstance(context, ImplicitAcquisitionWrapper) and
isinstance(aq_base(context), dict),
))
return original_changedField(field, value, context)
dm = zope.component.getMultiAdapter(
(context, field), interfaces.IDataManager)
if not dm.canAccess():
# Can't get the original value, assume it changed
return True
# Determine the original value
# Use a helper method that actually returns the persisted value,
# *without* triggering any fallbacks to default values or
# missing values.
try:
stored_value = get_persisted_value_for_field(context, field)
except AttributeError:
return True
if stored_value != value:
return True
return False
