Allow a StandardProperty to generate its accessors without relying on

Utils setDefaultProperties


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43881 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Core/StandardProperty.py

@@ -30,12 +30,31 @@ from AccessControl import ClassSecurityInfo
 from Products.CMFCore.Expression import Expression
 from Products.ERP5Type import Permissions, PropertySheet
 from Products.ERP5Type.XMLObject import XMLObject
-from Products.ERP5Type.Accessor.Base import Getter as BaseGetter
+
+from zLOG import LOG, WARNING, INFO
+from Products.ERP5Type.Accessor import Base, List, Alias, Translation
+from Products.ERP5Type.Accessor.TypeDefinition import type_definition, list_types
+from Products.ERP5Type.Utils import UpperCase, createExpressionContext, \
+     evaluateExpressionFromString
 from Products.ERP5Type.id_as_reference import IdAsReferenceMixin
 
 class StandardProperty(IdAsReferenceMixin('_property'), XMLObject):
   """
-  Define an Acquired Property Document for a ZODB Property Sheet
+  Define a Standard Property Document for a ZODB Property Sheet
+
+  A Standard Property contains the following attributes:
+   - reference: string
+   - description: string
+   - elementary_type: string
+   - storage_id: string
+   - multivalued: boolean (default: False)
+   - property_default: TALES Expression as a string
+   - range: boolean (default: False)
+   - preference: boolean (default: False)
+   - read_permission: string (default: Permissions.AccessContentsInformation)
+   - write_permission: string (default: Permissions.ModifyPortalContent)
+   - translatable: boolean (default: False)
+   - translation_domain: string
   """
   meta_type = 'ERP5 Standard Property'
   portal_type = 'Standard Property'
@@ -64,8 +83,8 @@ class StandardProperty(IdAsReferenceMixin('_property'), XMLObject):
   # There is no need to define the setter as this static definition of
   # the getter is only meaningful for the Standard Properties defined
   # within an Standard Property.
-  getDescription = BaseGetter('getDescription', 'description', 'string',
-                              default='')
+  getDescription = Base.Getter('getDescription', 'description', 'string',
+                               default='')
 
   def getElementaryType(self):
     """
@@ -78,38 +97,41 @@ class StandardProperty(IdAsReferenceMixin('_property'), XMLObject):
 
     return getattr(self, 'elementary_type', None)
 
-  getStorageId = BaseGetter('getStorageId', 'storage_id', 'string')
+  # The following getters have been defined to address bootstrap
+  # issues
+  getStorageId = Base.Getter('getStorageId', 'storage_id', 'string')
 
-  getMultivalued = BaseGetter('getMultivalued', 'multivalued', 'boolean',
-                              default=False)
+  getMultivalued = Base.Getter('getMultivalued', 'multivalued', 'boolean',
+                               default=False)
 
   # Define as a TALES expression string, use for Expression
   # instanciation when exporting the property to the filesystem
   # definition
-  getPropertyDefault = BaseGetter('getPropertyDefault', 'property_default',
-                                  'string')
+  getPropertyDefault = Base.Getter('getPropertyDefault', 'property_default',
+                                   'string')
 
-  getRange = BaseGetter('getRange', 'range', 'boolean', default=False)
+  getRange = Base.Getter('getRange', 'range', 'boolean', default=False)
 
-  getPreference = BaseGetter('getPreference', 'preference', 'boolean',
-                             default=False)
+  getPreference = Base.Getter('getPreference', 'preference', 'boolean',
+                              default=False)
 
-  getReadPermission = BaseGetter(
+  getReadPermission = Base.Getter(
     'getReadPermission', 'read_permission', 'string',
     default=Permissions.AccessContentsInformation)
 
-  getWritePermission = BaseGetter('getWritePermission',
-                                  'write_permission',
-                                  'string',
-                                  default=Permissions.ModifyPortalContent)
+  getWritePermission = Base.Getter('getWritePermission',
+                                   'write_permission',
+                                   'string',
+                                   default=Permissions.ModifyPortalContent)
 
-  getTranslatable = BaseGetter('getTranslatable', 'translatable', 'boolean',
-                               default=False)
+  getTranslatable = Base.Getter('getTranslatable', 'translatable', 'boolean',
+                                default=False)
 
-  getTranslationDomain = BaseGetter('getTranslationDomain',
-                                    'translation_domain',
-                                    'string')
+  getTranslationDomain = Base.Getter('getTranslationDomain',
+                                     'translation_domain',
+                                     'string')
 
+  # TODO: REMOVE
   @staticmethod
   def _getExpressionFromString(expression_string):
     """
@@ -120,11 +142,15 @@ class StandardProperty(IdAsReferenceMixin('_property'), XMLObject):
 
     return Expression(expression_string)
 
+  # TODO: REMOVE
   security.declareProtected(Permissions.AccessContentsInformation,
                             'exportToFilesystemDefinition')
   def exportToFilesystemDefinition(self):
     """
     Return the filesystem definition of this ZODB property
+
+    NOTE: Only meaningful for testing export of filesystem Property
+    Sheet to the ZODB
     """
     property_default_value = self._getExpressionFromString(self.getPropertyDefault())
 
@@ -143,11 +169,519 @@ class StandardProperty(IdAsReferenceMixin('_property'), XMLObject):
               'translatable': self.getTranslatable(),
               'translation_domain': self.getTranslationDomain()}
 
+  @classmethod
+  def _asPropertyMap(cls, property_dict):
+    """
+    Return the Zope definition of this ZODB property, as used by the
+    PropertyManager (for the ZMI for example).
+
+    ERP5 _properties and Zope _properties are somehow different. The
+    id is converted to the Zope standard - we keep the original id as
+    base_id.
+
+    @param property_dict: ZODB property dict
+    @type property_dict: dict
+    @return: PropertyManager definition
+    @rtype: dict
+    """
+    property_dict['type'] = property_dict.pop('elementary_type')
+    property_dict['default'] = property_dict.pop('property_default')
+
+    property_dict['id'] = property_dict.pop('reference')
+
+    # In case, this property is a list, then display it as a list
+    if property_dict['type'] in list_types or property_dict['multivalued']:
+      property_dict['base_id'] = property_dict['id']
+      property_dict['id'] = property_dict['id'] + '_list'
+
+    return property_dict
+
+  @staticmethod
+  def _applyDefinitionFormatDictOnAccessorHolder(reference,
+                                                 definition_dict,
+                                                 accessor_holder,
+                                                 argument_list,
+                                                 permission):
+    """
+    Apply a definition dict, a format string defining the accessor
+    name as the key (formatted with the given reference) and the
+    accessor class to be used as the value, on the given accessor
+    holder class.
+
+    The accessor class given in the definition dict is instanciated
+    with the given argument list and the the accessor is protected
+    using the given permission (which may be either read if it is a
+    getter or tester, or write if it is a setter), it is then
+    registered on the accessor holder.
+
+    For most cases, the reference is used in the accessor name but
+    there are exceptions, such as translation accessors.
+
+    @param reference: Reference to be used to format accessor name
+    @type reference: str
+    @param definition_dict: Definition of accessors being created
+    @type definition_dict: dict
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+    @param argument_list: Arguments to be given to the accessor class constructor
+    @type argument_list: list
+    @param permission: Permission to be applied on the accessor
+    @type permission: str
+    """
+    uppercase_reference = UpperCase(reference)
+    for format, klass in definition_dict.iteritems():
+      name = format % uppercase_reference
+
+      instance = klass(name, reference, *argument_list)
+      accessor_holder.registerAccessor(instance, permission)
+
+      # Public setters actually just calls the private one and then
+      # perform a re-indexing
+      if name.startswith('_set'):
+        instance = Alias.Reindex(name[1:], name)
+        accessor_holder.registerAccessor(instance, permission)
+
+  @classmethod
+  def _applyRangeOnAccessorHolder(cls,
+                                  property_dict,
+                                  accessor_holder,
+                                  kind,
+                                  portal):
+    """
+    Apply range accessors.
+
+    @param property_dict: Property to generate getter for
+    @type property_dict: dict
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+    @param kind: 'min' or 'max'
+    @type kind: string
+    @param portal: Portal object
+    @type portal: Products.ERP5.ERP5Site.ERP5Site
+    """
+    property_dict['reference'] = '%s_range_%s' % (property_dict['reference'],
+                                                  kind)
+
+    # Override storage_id to not store the value on the same attribute
+    # as the "normal" accessor
+    property_dict['storage_id'] = None
+
+    # Set range to False to avoid infinite recursion upon
+    # applyDefinitionOnAccessorHolder call
+    property_dict['range'] = False
+
+    cls.applyDefinitionOnAccessorHolder(property_dict,
+                                        accessor_holder,
+                                        portal,
+                                        do_register=False)
+
+  _translation_language_getter_definition_dict = {
+    'get%s': Translation.TranslatedPropertyGetter,
+    '_baseGet%s': Translation.TranslatedPropertyGetter
+  }
+
+  _translation_language_getter_definition_dict = {
+    'get%s': Translation.TranslatedPropertyGetter,
+    '_baseGet%s': Translation.TranslatedPropertyGetter
+  }
+
+  _translation_language_tester_definition_dict = {
+    'has%s': Translation.TranslatedPropertyTester
+  }
+
+  _translation_language_setter_definition_dict = {
+    '_set%s': Translation.TranslationPropertySetter
+  }
+
+  @classmethod
+  def _applyTranslationLanguageOnAccessorHolder(cls,
+                                                property_dict,
+                                                accessor_holder,
+                                                portal):
+    """
+    Apply translation language accessors.
+
+    @param property_dict: Property to generate getter for
+    @type property_dict: dict
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+    @param portal: Portal object
+    @type portal: Products.ERP5.ERP5Site.ERP5Site
+    """
+    try:
+      localizer = portal._getOb('Localizer')
+    except AttributeError:
+      if not getattr(portal, '_v_bootstrapping', False):
+        LOG("ERP5Type.Core.StandardProperty", WARNING,
+            "Localizer is missing. Accessors can not be generated")
+
+      return
+
+    # Apply language-specific accessors
+    for language in localizer.get_languages():
+      translation_language_id = '%s_translated_%s' % \
+          (language.replace('-', '_'),
+           property_dict['reference'])
+
+      # Prepare accessor arguments for getters
+      getter_argument_list = (property_dict['reference'],
+                              property_dict['elementary_type'],
+                              language,
+                              property_dict['property_default'])
+
+      cls._applyDefinitionFormatDictOnAccessorHolder(
+        translation_language_id,
+        cls._translation_language_getter_definition_dict,
+        accessor_holder,
+        getter_argument_list,
+        property_dict['read_permission'])
+
+      # Prepare accessor arguments for testers and setters
+      tester_setter_argument_list = (property_dict['reference'],
+                                     property_dict['elementary_type'],
+                                     language)
+
+      cls._applyDefinitionFormatDictOnAccessorHolder(
+        translation_language_id,
+        cls._translation_language_tester_definition_dict,
+        accessor_holder,
+        tester_setter_argument_list,
+        property_dict['read_permission'])
+
+      cls._applyDefinitionFormatDictOnAccessorHolder(
+        translation_language_id,
+        cls._translation_language_setter_definition_dict,
+        accessor_holder,
+        tester_setter_argument_list,
+        property_dict['write_permission'])
+
+  _primitive_getter_definition_dict = {
+    'get%s': Base.Getter,
+    '_baseGet%s': Base.Getter
+  }
+
+  _list_getter_definition_dict = {
+    'get%s': List.Getter,
+    '_baseGet%s': List.Getter,
+    'getDefault%s': List.DefaultGetter,
+    '_baseGetDefault%s': List.DefaultGetter,
+    'get%sList': List.ListGetter,
+    '_baseGet%sList': List.ListGetter,
+    'get%sSet': List.SetGetter,
+    '_baseGet%sSet': List.SetGetter
+  }
+
+  @classmethod
+  def _applyGetterDefinitionDictOnAccessorHolder(cls,
+                                                 property_dict,
+                                                 accessor_holder):
+    """
+    Apply getters for the given property on the given accessor holder.
+    This method is overriden in AcquiredProperty for example to add
+    accessors specific to Acquired Properties.
+
+    @param property_dict: Property to generate getter for
+    @type property_dict: dict
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+
+    @see _applyDefinitionFormatDictOnAccessorHolder
+    """
+    argument_list = (property_dict['elementary_type'],
+                     property_dict['property_default'],
+                     property_dict['storage_id'])
+
+    if property_dict['elementary_type'] in list_types or \
+       property_dict['multivalued']:
+      definition_dict = cls._list_getter_definition_dict
+    else:
+      definition_dict = cls._primitive_getter_definition_dict
+
+    cls._applyDefinitionFormatDictOnAccessorHolder(
+      property_dict['reference'], definition_dict, accessor_holder,
+      argument_list, property_dict['read_permission'])
+
+  _list_setter_definition_dict = {
+    '_set%s': List.Setter,
+    '_baseSet%s': List.Setter,
+    '_setDefault%s': List.DefaultSetter,
+    '_baseSetDefault%s': List.DefaultSetter,
+    '_set%sList': List.ListSetter,
+    '_baseSet%sList': List.ListSetter,
+    '_set%sSet': List.SetSetter,
+    '_baseSet%sSet': List.SetSetter
+  }
+
+  _primitive_setter_definition_dict = {
+    '_set%s': Base.Setter,
+    '_baseSet%s': Base.Setter
+  }
+
+  @classmethod
+  def _applySetterDefinitionDictOnAccessorHolder(cls,
+                                                 property_dict,
+                                                 accessor_holder):
+    """
+    Apply setters for the given property on the given accessor holder.
+
+    @param property_dict: Property to generate getter for
+    @type property_dict: dict
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+
+    @see _applyGetterDefinitionDictOnAccessorHolder
+    """
+    argument_list = (property_dict['elementary_type'],
+                     property_dict['storage_id'])
+
+    if property_dict['elementary_type'] in list_types or \
+       property_dict['multivalued']:
+      definition_dict = cls._list_setter_definition_dict
+    else:
+      definition_dict = cls._primitive_setter_definition_dict
+
+    cls._applyDefinitionFormatDictOnAccessorHolder(
+      property_dict['reference'], definition_dict, accessor_holder,
+      argument_list, property_dict['write_permission'])
+
+  _tester_definition_dict = {
+    'has%s': Base.Tester,
+    '_baseHas%s': Base.Tester,
+    'has%sList': List.Tester,
+    '_baseHas%sList': List.Tester,
+    'hasDefault%s': List.Tester,
+    '_baseHasDefault%s': List.Tester
+  }
+
+  _boolean_definition_dict = {
+    'is%s': Base.Getter,
+    '_baseIs%s': Base.Getter
+  }
+
+  @classmethod
+  def _applyTesterDefinitionDictOnAccessorHolder(cls,
+                                                 property_dict,
+                                                 accessor_holder):
+    """
+    Apply testers and boolean accessors for the given property on the
+    given accessor holder.
+
+    @param property_dict: Property to generate getter for
+    @type property_dict: dict
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+
+    @see _applyGetterDefinitionDictOnAccessorHolder
+    """
+    tester_argument_list = (property_dict['elementary_type'],
+                            property_dict['storage_id'])
+
+    cls._applyDefinitionFormatDictOnAccessorHolder(
+      property_dict['reference'], cls._tester_definition_dict, accessor_holder,
+      tester_argument_list, property_dict['read_permission'])
+
+    boolean_argument_list = (property_dict['elementary_type'],
+                             property_dict['property_default'],
+                             property_dict['storage_id'])
+
+    cls._applyDefinitionFormatDictOnAccessorHolder(
+      property_dict['reference'], cls._boolean_definition_dict, accessor_holder,
+      boolean_argument_list, property_dict['read_permission'])
+
+  _translated_getter_definition_dict = {
+    'get%s': Translation.TranslatedPropertyGetter,
+    '_baseGet%s': Translation.TranslatedPropertyGetter
+  }
+
+  security.declareProtected(Permissions.ModifyPortalContent,
+                            'applyDefinitionOnAccessorHolder')
+  @classmethod
+  def applyDefinitionOnAccessorHolder(cls,
+                                      property_dict,
+                                      accessor_holder,
+                                      portal,
+                                      do_register=True):
+    """
+    Apply getters, setters and testers for a list property or a
+    primitive property.
+
+    This class method may be called to apply a property dictionnary on
+    an accessor holder. While applyOnAccessorHolder is commonly used
+    to apply a property on an *existing* ZODB Property Sheet, this
+    method can be used to apply accessors from a Property not defined
+    in a ZODB Property Sheet.
+
+    The property dictionnary must define all the attributes listed in
+    the class docstring.
+
+    The TALES Expression in the given property dict are considered to
+    have been already evaluated, as performed through
+    applyOnAccessorHolder by asDict method.
+
+    @param property_dict: Property to generate getter for
+    @type property_dict: dict
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+    @param portal: Portal object
+    @type portal: Products.ERP5.ERP5Site.ERP5Site
+    @param do_register: Register the property in the Zope property map
+    @type do_register: bool
+    """
+    # Some attributes are required to generate accessors, if they have
+    # not been set properly, then don't generate them at all for this
+    # Property
+    if property_dict['reference'] is None or \
+       property_dict['elementary_type'] is None or \
+       property_dict['elementary_type'] not in type_definition:
+      raise ValueError("Invalid type or reference")
+
+    # Create range accessors if relevant
+    if property_dict['range']:
+      for kind in ('min', 'max'):
+        cls._applyRangeOnAccessorHolder(property_dict.copy(),
+                                        accessor_holder, kind, portal)
+
+    # Create translation accessors if relevant
+    if property_dict['translatable']:
+      translated_property_dict = property_dict.copy()
+
+      if translated_property_dict['property_default'] is None:
+        translated_property_dict['property_default'] = ''
+
+      # Make accessors such as getTranslatedProperty
+      translated_reference = 'translated_' + property_dict['reference']
+
+      argument_list = (translated_property_dict['reference'],
+                       translated_property_dict['elementary_type'],
+                       None,
+                       translated_property_dict['property_default'])
+
+      cls._applyDefinitionFormatDictOnAccessorHolder(
+        translated_reference, cls._translated_getter_definition_dict,
+        accessor_holder, argument_list,
+        translated_property_dict['read_permission'])
+
+      cls._applyTranslationLanguageOnAccessorHolder(translated_property_dict,
+                                                    accessor_holder, portal)
+
+      # make accessor to translation_domain
+      # first create default one as a normal property
+      translation_domain_reference = translated_property_dict['reference'] + \
+                                     '_translation_domain'
+
+      translation_domain_property_dict = {
+        'reference': translation_domain_reference,
+        'elementary_type': 'string',
+        'property_default': '',
+        'multivalued': False,
+        'storage_id': None,
+        'range': False,
+        'translatable': False,
+        'read_permission': translated_property_dict['read_permission'],
+        'write_permission': translated_property_dict['write_permission']}
+
+      # This will always be a StandardProperty, so avoid calling
+      # super() here
+      StandardProperty.applyDefinitionOnAccessorHolder(
+        translation_domain_property_dict, accessor_holder, portal,
+        do_register=False)
+
+      # Then override getPropertyTranslationDomain accessor
+      accessor = Translation.PropertyTranslationDomainGetter(
+        'get' + UpperCase(translation_domain_reference),
+        translation_domain_reference, 'string',
+        property_dict['translation_domain'])
+
+      accessor_holder.registerAccessor(
+        accessor, translated_property_dict['read_permission'])
+
+    # After applying specific getters, setters and testers, apply
+    # common getters, setters and testers
+    cls._applyGetterDefinitionDictOnAccessorHolder(property_dict,
+                                                   accessor_holder)
+
+    cls._applySetterDefinitionDictOnAccessorHolder(property_dict,
+                                                   accessor_holder)
+
+    cls._applyTesterDefinitionDictOnAccessorHolder(property_dict,
+                                                   accessor_holder)
+
+    # By default, register the property as a Zope property map, by
+    # adding it to _properties, which will be later used by
+    # PropertyManager
+    if do_register:
+      property_map = cls._asPropertyMap(property_dict)
+      if property_map:
+        accessor_holder._properties.append(property_map)
+
+  security.declareProtected(Permissions.AccessContentsInformation,
+                            'asDict')
+  def asDict(self, expression_context=None):
+    """
+    Convert the current property to a dict, which is then applied on
+    the accessor holder.
+
+    @param expression_context: Expression context for TALES Expression
+    @type expression_context: Products.PageTemplates.Expressions.ZopeContext
+    @return: The current property as a dict
+    @rtype: dict
+    """
+    # If no expression context has been given, create one, meaningful
+    # when being called from the browser for example
+    if expression_context is None:
+      expression_context = createExpressionContext(self.getPortalObject())
+
+    property_default = evaluateExpressionFromString(expression_context,
+                                                    self.getPropertyDefault())
+
+    return {'reference': self.getReference(),
+            'description': self.getDescription(),
+            'elementary_type': self.getElementaryType(),
+            'storage_id': self.getStorageId(),
+            'multivalued': self.getMultivalued(),
+            'property_default': property_default,
+            'range': self.getRange(),
+            'preference': self.getPreference(),
+            'read_permission': self.getReadPermission(),
+            'write_permission': self.getWritePermission(),
+            'translatable': self.getTranslatable(),
+            'translation_domain': self.getTranslationDomain()}
+
+  security.declareProtected(Permissions.ModifyPortalContent,
+                            'applyOnAccessorHolder')
+  def applyOnAccessorHolder(self,
+                            accessor_holder,
+                            expression_context,
+                            portal):
+    """
+    Apply the ZODB Property to the given accessor holder
+
+    @param accessor_holder: Accessor holder to applied the accessors on
+    @type accessor_holder: Products.ERP5Type.dynamic.accessor_holder.AccessorHolderType
+    @param expression_context: Expression context for TALES Expression
+    @type expression_context: Products.PageTemplates.Expressions.ZopeContext
+    @param portal: Portal object
+    @type portal: Products.ERP5.ERP5Site.ERP5Site
+
+    @see applyDefinitionOnAccessorHolder
+    """
+    self.applyDefinitionOnAccessorHolder(self.asDict(expression_context),
+                                         accessor_holder,
+                                         portal)
+
   @classmethod
   def _convertFromFilesystemPropertyDict(cls, filesystem_property_dict):
     """
     Convert a property dict coming from a Property Sheet on the
-    filesystem to a ZODB property dict
+    filesystem to a ZODB property dict.
+
+    This method is just kept for backward-compatibility with
+    filesystem Property Sheets used before ZODB Property Sheets.
+
+    @param filesystem_property_dict: Filesystem property definition
+    @type filesystem_property_dict: dict
+    @return: ZODB property definition
+    @rtype: dict
     """
     # Prepare a dictionnary of the ZODB property
     zodb_property_dict = {}
@@ -173,12 +707,23 @@ class StandardProperty(IdAsReferenceMixin('_property'), XMLObject):
 
     return zodb_property_dict
 
-  security.declareProtected(Permissions.AccessContentsInformation,
+  security.declareProtected(Permissions.ModifyPortalContent,
                             'importFromFilesystemDefinition')
   @classmethod
   def importFromFilesystemDefinition(cls, context, filesystem_property_dict):
     """
-    Set attributes from the filesystem definition of a property
+    Create a new property on the given context from the given
+    filesystem definition dict.
+
+    This method is just kept for backward-compatibility with
+    filesystem Property Sheets used before ZODB Property Sheets.
+
+    @param context: Context to create the property in
+    @type context: Products.ERP5Type.Core.PropertySheet
+    @param filesystem_property_dict: Filesystem definition
+    @param filesystem_property_dict: dict
+    @return: The new Standard Property
+    @rtype: StandardProperty
     """
     return context.newContent(
       portal_type=cls.portal_type,