############################################################################## # # Copyright (c) 2002 Nexedi SARL and Contributors. All Rights Reserved. # Jean-Paul Smets-Solanes <jp@nexedi.com> # Guillaume Michon <guillaume@nexedi.com> # # WARNING: This program as such is intended to be used by professional # programmers who take the whole responsability of assessing all potential # consequences resulting from its eventual inadequacies and bugs # End users who are looking for a ready-to-use solution with commercial # garantees and support are strongly adviced to contract a Free Software # Service Company # # This program is Free Software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # ############################################################################## from Globals import InitializeClass, PersistentMapping from AccessControl import ClassSecurityInfo from DateTime import DateTime from Products.ERP5Type import Permissions, PropertySheet, Constraint, Interface from Products.ERP5Type.XMLObject import XMLObject from Products.ERP5Type.DateUtils import addToDate, getClosestDate, getIntervalBetweenDates, roundMonthToGreaterEntireYear from Products.ERP5Type.DateUtils import getMonthAndDaysBetween, getCompletedMonthBetween, getRoundedMonthBetween from Products.ERP5Type.DateUtils import getMonthFraction, getYearFraction, getDecimalNumberOfYearsBetween from Products.ERP5Type.DateUtils import same_movement_interval, number_of_months_in_year, centis, millis from Products.ERP5.Document.Amount import Amount from Products.CMFCore.WorkflowCore import WorkflowMethod from Products.CMFCore.utils import getToolByName from Products.ERP5.Document.Immobilisation import Immobilisation #from Products.ERP5.Document.AmortisationRule import AmortisationRule from zLOG import LOG class Item(XMLObject, Amount): """ Items in ERP5 are intended to provide a way to track objects """ meta_type = 'ERP5 Item' portal_type = 'Item' add_permission = Permissions.AddPortalContent isPortalContent = 1 isRADContent = 1 # Declarative security security = ClassSecurityInfo() security.declareObjectProtected(Permissions.View) # Declarative properties property_sheets = ( PropertySheet.Base , PropertySheet.XMLObject , PropertySheet.CategoryCore , PropertySheet.DublinCore , PropertySheet.Price , PropertySheet.Resource , PropertySheet.Item , PropertySheet.Amount , PropertySheet.Reference , PropertySheet.Amortisation ) # Factory Type Information factory_type_information = \ { 'id' : portal_type , 'meta_type' : meta_type , 'description' : """\ Items in ERP5 are intended to provide a way to track objects.""" , 'icon' : 'item_icon.gif' , 'product' : 'ERP5' , 'factory' : 'addItem' , 'immediate_view' : 'item_edit' , 'actions' : ( { 'id' : 'view' , 'name' : 'View' , 'category' : 'object_view' , 'action' : 'item_edit' , 'permissions' : ( Permissions.View, ) } , { 'id' : 'print' , 'name' : 'Print' , 'category' : 'object_print' , 'action' : 'item_print' , 'permissions' : ( Permissions.View, ) } , { 'id' : 'metadata' , 'name' : 'Metadata' , 'category' : 'object_edit' , 'action' : 'metadata_edit' , 'permissions' : ( Permissions.View, ) } , { 'id' : 'translate' , 'name' : 'Translate' , 'category' : 'object_action' , 'action' : 'translation_template_view' , 'permissions' : ( Permissions.TranslateContent, ) } ) } security.declareProtected(Permissions.ModifyPortalContent,'generateNewId') def generateNewId(self, id_group='item_id_group', default=None, method=None): """ We want a different id for all Item """ return XMLObject.generateNewId(self, id_group=id_group, default=default, method=method) ### Amortisation security.declareProtected(Permissions.View, 'getImmobilisationMovementValueList') def getImmobilisationMovementValueList(self, from_date=None, to_date=None, sort_on="stop_date", filter_valid=1, owner_change=1, **kw): """ Returns a list of immobilisation movements applied to current item from date to date """ accessor = 'get' if sort_on is not None: word_list = sort_on.split('_') for i in range(len(word_list)): accessor += word_list[i].capitalize() def cmpfunc(a,b, accessor = accessor): """ Compares the two objects according to the accessor value. """ access_a = getattr(a, accessor, None) access_b = getattr(b, accessor, None) if access_a is None or access_b is None: return 0 value_a = access_a() value_b = access_b() if value_a is None and value_b is None: return 0 if value_a is None or value_a < value_b: return -1 if value_b is None or value_b < value_a: return 1 return 0 depth = kw.get('depth', None) if depth is None: depth = 0 immobilisation_list = [] for immobilisation in self.contentValues(filter = { 'portal_type':'Immobilisation' } ): LOG('Item, immobilisation.checkConsistency',0,immobilisation.checkConsistency()) if filter_valid: invalid = immobilisation._checkConsistency() # else: invalid = 0 if not invalid: immo_date = immobilisation.getStopDate() if ( to_date is None or immo_date - to_date <= 0 ) and \ ( from_date is None or immo_date - from_date >= 0 ): immobilisation_list.append(immobilisation) LOG('Item.immobilisation_list',0,immobilisation_list) # Look for each change of ownership and an immobilisation movement within 1 hour # If found, adapt the immobilisation date to be correctly interpreted # If not found, and owner_change set to 1, create a context immobilisation movement ownership_list = self.getSectionList(to_date) for ownership in ownership_list: owner_date = ownership['date'] found_immo = None nearest_immo = None i = 0 while i < len(immobilisation_list) and found_immo is None: immobilisation = immobilisation_list[i] my_date = immobilisation.getStopDate() if (my_date is not None) and (my_date - owner_date < 0) and (nearest_immo is None or nearest_immo.getStopDate() - my_date < 0): nearest_immo = immobilisation if (my_date is not None) and abs(owner_date - my_date) < same_movement_interval: found_immo = immobilisation i += 1 if found_immo is None and owner_change and nearest_immo is not None: immobilisation = nearest_immo if nearest_immo is not None: added_immo = None added_immo = immobilisation.asContext() added_immo.setStopDate(owner_date + millis) if added_immo.getImmobilisation(): vat = immobilisation.getVat() previous_value = immobilisation.getAmortisationOrDefaultAmortisationPrice() current_value = added_immo.getDefaultAmortisationPrice(depth = depth + 1) added_immo.setInputAccount(added_immo.getOutputAccount()) added_immo.setAmortisationBeginningPrice(current_value) added_immo.setAmortisationDuration(added_immo.getDefaultAmortisationDuration(depth = depth + 1)) added_immo.setVat( vat * current_value / previous_value ) immobilisation_list.append(added_immo) found_immo = added_immo if found_immo is not None: # Two cases : # - An unimmobilising movement and ownership change are close : # the unimmobilising movement has to be before the ownership change # - An immobilising movement and ownership change are close : # the immobilising movement has to be after the ownership change found_date = found_immo.getStopDate() if found_immo.getImmobilisation(): if found_date - owner_date < 0: found_immo.setStopDate(owner_date + centis) else: if found_date - owner_date > 0: found_immo.setStopDate(owner_date - centis) if sort_on is not None: immobilisation_list.sort(cmpfunc) return immobilisation_list security.declareProtected(Permissions.View, 'getUnfilteredImmobilisationMovementValueList') def getUnfilteredImmobilisationMovementValueList(self, from_date=None, to_date=None, sort_on="stop_date", owner_change=0, **kw): """ Returns a list of immobilisation applied to the current item from date to date All of the movements are returned, not even those which are valid """ return self.getImmobilisationMovementValueList(from_date=from_date, to_date=to_date, sort_on=sort_on, owner_change=owner_change, filter_valid=0, **kw) security.declareProtected(Permissions.View, 'getPastImmobilisationMovementValueList') def getPastImmobilisationMovementValueList(self, from_date=None, at_date=None, sort_on="stop_date", owner_change=1, **kw): """ Returns a list of immobilisation movements applied to current item before the given date, or now """ if at_date is None: at_date = DateTime() result = self.getImmobilisationMovementValueList(from_date = from_date, to_date = at_date, sort_on = sort_on, owner_change = owner_change, **kw ) return result security.declareProtected(Permissions.View, 'getFutureImmobilisationMovementValueList') def getFutureImmobilisationMovementValueList(self, to_date=None, at_date=None, sort_on="stop_date", owner_change=1, **kw): """ Returns a list of immobilisation movements applied to current item after the given date, or now """ if at_date is None: at_date = DateTime() result = self.getImmobilisationMovementValueList(from_date = at_date, to_date = to_date, sort_on = sort_on, owner_change = owner_change, **kw) return result security.declareProtected(Permissions.View, 'getLastImmobilisationMovementValue') def getLastImmobilisationMovementValue(self, at_date=None, owner_change=1, **kw): """ Returns the last immobilisation movement before the given date, or now """ result_sql = self.getPastImmobilisationMovementValueList(at_date = at_date, owner_change=owner_change, **kw) result = None if len(result_sql) > 0: result = result_sql[-1] return result security.declareProtected(Permissions.View, 'getLastMovementAmortisationDuration') def getLastMovementAmortisationDuration(self, at_date=None, owner_change=1, **kw): """ Returns total duration of amortisation for the item. It is the theorical lifetime of this type of item. """ last_immobilisation_movement = self.getLastImmobilisationMovementValue(at_date = at_date, owner_change=owner_change, **kw) if last_immobilisation_movement is not None: return last_immobilisation_movement.getAmortisationOrDefaultAmortisationDuration() else: return None security.declareProtected(Permissions.View, 'isCurrentlyImmobilised') def isCurrentlyImmobilised(self, **kw): """ Returns true if the item is immobilised at this time """ return self.isImmobilised(at_date = DateTime(), **kw) security.declareProtected(Permissions.View, 'isNotCurrentlyImmobilised') def isNotCurrentlyImmobilised(self, **kw): """ Returns true if the item is not immobilised at this time """ return not self.isCurrentlyImmobilised(**kw) security.declareProtected(Permissions.View, 'isImmobilised') def isImmobilised(self, at_date=None, **kw): """ Returns true if the item is immobilised at the given date. If at_date = None, returns true if the item has ever been immobilised.""" if at_date is not None: is_immobilised = 0 last_immobilisation_movement = self.getLastImmobilisationMovementValue(at_date = at_date, **kw) if last_immobilisation_movement is not None: is_immobilised = last_immobilisation_movement.getImmobilisation() else: past_immobilisation_movement_list = self.getPastImmobilisationMovementValueList(at_date = DateTime(), **kw) for past_immobilisation in past_immobilisation_movement_list: if past_immobilisation.getImmobilisation(): return 1 return is_immobilised security.declareProtected(Permissions.View, 'getCurrentAmortisationDuration') def getCurrentAmortisationDuration(self, **kw): """ Returns the total time the item has been amortised until now. """ return self.getRemainingAmortisationDuration(at_date = DateTime(), **kw) security.declareProtected(Permissions.View, 'getRemainingAmortisationDuration') def getRemainingAmortisationDuration(self, at_date=None, from_immobilisation=0, **kw): """ Returns the calculated remaining amortisation duration for the item. It is based on the latest immobilisation period at given date, or now. If from_immobilisation is set, we don't take the very last immobilisation movement at the date. It is needed if the function is called by this particular movement, unless the function will never end. """ if at_date is None: at_date = DateTime() # Find the latest movement whose immobilisation is true if from_immobilisation: my_at_date = at_date - centis else: my_at_date = at_date immobilisation_movements = self.getPastImmobilisationMovementValueList(at_date = my_at_date, **kw) i = len(immobilisation_movements) - 1 while i >= 0 and not immobilisation_movements[i].getImmobilisation(): i -= 1 if i < 0: # Neither of past immobilisation movements did immobilise the item... duration = self.getLastMovementAmortisationDuration(at_date=my_at_date) if duration is not None: return int(duration) return None start_movement = immobilisation_movements[i] if i > len(immobilisation_movements) - 2: # Item is currently in an amortisation period immo_period_stop_date = at_date else: stop_movement = immobilisation_movements[i+1] immo_period_stop_date = stop_movement.getStopDate() immo_period_start_date = start_movement.getStopDate() immo_period_remaining = start_movement.getAmortisationOrDefaultAmortisationDuration() immo_period_duration = getRoundedMonthBetween(immo_period_start_date, immo_period_stop_date) returned_value = immo_period_remaining - immo_period_duration if returned_value < 0: returned_value = 0 return int(returned_value) security.declareProtected(Permissions.View, 'getAmortisationPrice') def getAmortisationPrice(self, at_date=None, from_immobilisation=0, with_currency=0, **kw): """ Returns the deprecated value of item at given date, or now. If from_immobilisation is set, we don't take the very last immobilisation movement at the date. It is needed if the function is called by this particular movement, unless the function will never end. If with_currency is set, returns a string containing the value and the corresponding currency. """ def calculateProrataTemporis(immo_period_start_date, immo_period_stop_date, raw_annuity_value=0, amortisation_type='degressive', financial_date=None): """ Returns the value of the annuity respecting to the amortisation duration during this annuity. """ if amortisation_type == 'degressive': month_value = raw_annuity_value / number_of_months_in_year duration = getMonthAndDaysBetween(immo_period_start_date, immo_period_stop_date) month_number = duration['month'] day_number = duration['day'] annuity_value = month_value * (month_number + getMonthFraction(immo_period_stop_date, day_number)) return annuity_value else: # Linear amortisation : it is calculated on days, # unlike degressive amortisation which is calculated on months return getDecimalNumberOfYearsBetween(immo_period_start_date, immo_period_stop_date, financial_date) * raw_annuity_value if at_date is None: at_date = DateTime() # Find the latest movement whose immobilisation is true if from_immobilisation: # We need to exclude the immobilisation movement which calls currently the method, # unless the method will never end my_at_date = at_date - centis else: my_at_date = at_date immobilisation_movements = self.getPastImmobilisationMovementValueList(at_date = my_at_date, **kw) length = len(immobilisation_movements) i = length - 1 while i >= 0 and not immobilisation_movements[i].getImmobilisation(): i -= 1 if i < 0: # Neither of past immobilisation movements did immobilise the item... LOG ('ERP5 Warning :',0,'Neither of past immobilisation movements did immobilise the item %s' % self.getTitle()) if length > 0: returned_value = immobilisation_movements[-1].getAmortisationOrDefaultAmortisationPrice() if with_currency: return '%s %s' % (repr(returned_value), immobilisation_movements[-1].getPriceCurrency()) return returned_value return None # XXX How to find the buy value ? # Find the latest immobilisation period and gather information start_movement = immobilisation_movements[i] currency = start_movement.getPriceCurrency() if currency is not None: currency = currency.split('/')[-1] immo_period_start_date = start_movement.getStopDate() if i >= len(immobilisation_movements) - 1: # Item is currently in an amortisation period immo_period_stop_date = at_date else: stop_movement = immobilisation_movements[i+1] immo_period_stop_date = stop_movement.getStopDate() start_value = start_movement.getAmortisationOrDefaultAmortisationPrice() immo_period_remaining_months = start_movement.getAmortisationOrDefaultAmortisationDuration() section = start_movement.getSectionValue() financial_date = section.getFinancialYearStopDate() # Calculate the amortisation value amortisation_type = start_movement.getAmortisationType() if amortisation_type == "linear": # Linear amortisation prorata temporis calculation is made on a number of days # unlike degressive amortisation, made on a number of months raw_annuity_value = start_value / (immo_period_remaining_months / number_of_months_in_year) annuity_value = calculateProrataTemporis(raw_annuity_value=raw_annuity_value, amortisation_type='linear', immo_period_stop_date=immo_period_stop_date, immo_period_start_date=immo_period_start_date, financial_date=financial_date) new_value = start_value - annuity_value if new_value < 0: new_value = 0 if with_currency: return '%s %s' % (repr(round(new_value,2)), currency) return round(new_value,2) elif amortisation_type == "degressive": if financial_date is None: LOG('ERP5 Warning :', 100, 'Organisation object "%s" has no financial date.' % (repr(section.getTitle()),)) return None # Degressive amortisation is made on entire annuities, unless the first. # So, saying we immobilise on 114 months as degressive amortisation is meaningless : # in fact, we immobilise on 120 months. # So we need to round the remaining period to the just greater entire year # Normally, since amortisation is made as soon as the item acquisition for degressive # amortisation, the immobilisation can not be stopped and restarted. # However, if we immobilised the item during an incomplete year before, we also round the # remaining period of immobilisation immo_period_remaining_months = roundMonthToGreaterEntireYear(immo_period_remaining_months) # Degressive amortisation is taken in account on months, and not on days. # So we need to adjust the immobilisation period start and stop date so that # they are at the beginning of a month (a month of financial year - i.e. if # the financial year date end is March 15th, immobilisation start date is fixed # to previous 15th, and immobilisation stop date is fixed to next 15th immo_period_start_date = getClosestDate(target_date=immo_period_start_date, date=financial_date, precision='month') immo_period_stop_date = getClosestDate(target_date=immo_period_stop_date, date=financial_date, precision='month', before=0) # Get the first financial end date before the beginning of the immobilisation period # and the last financial date after the end of the immobilisation period. first_financial_date = getClosestDate(target_date=immo_period_start_date, date=financial_date, precision='year') last_financial_date = getClosestDate(target_date=immo_period_stop_date, date=financial_date, precision='year', before=0) is_last_amortisation_period = 0 # Adjust the immobilisation period stop date and last financial date # if the current period exceeds the regular immobilisation period month_difference = getIntervalBetweenDates(first_financial_date, last_financial_date, {'month':1} )['month'] if month_difference >= immo_period_remaining_months: last_financial_date = addToDate(last_financial_date, {'month':immo_period_remaining_months} ) is_last_amortisation_period = 1 immo_period_stop_date = last_financial_date #entire_annuities_duration = (last_financial_date.year() - first_financial_date.year()) * 365.25 # Find the degressive coefficient fiscal_coef = start_movement.getFiscalCoefficient() normal_amortisation_coefficient = 1./ getYearFraction(first_financial_date, months=immo_period_remaining_months) degressive_coef = normal_amortisation_coefficient * fiscal_coef annuities = 0 # Cumulated annuities value if getIntervalBetweenDates(first_financial_date, last_financial_date, {'day':1})['day'] > 0: # First annuity is particular since we use prorata temporis ratio second_financial_date = addToDate(first_financial_date, {'year':1}) if getIntervalBetweenDates(immo_period_stop_date, second_financial_date, {'days':1}) < 0: annuity_end_date = immo_period_stop_date else: annuity_end_date = second_financial_date if normal_amortisation_coefficient <= round(degressive_coef, 2): applied_coef = degressive_coef else: applied_coef = normal_amortisation_coefficient raw_annuity_value = start_value * applied_coef annuity_value = calculateProrataTemporis(immo_period_start_date, annuity_end_date, raw_annuity_value=raw_annuity_value) annuities += annuity_value linear_coef = 0 current_financial_date = second_financial_date # Other annuities while current_financial_date < last_financial_date: remaining_months = immo_period_remaining_months - getIntervalBetweenDates(first_financial_date, current_financial_date, {'month':1})['month'] if not linear_coef: # Linear coef has not been set yet, so we have to check # if it is time to use it or not current_value = start_value - annuities linear_coef = 1./ getYearFraction(last_financial_date, months=remaining_months) if linear_coef <= round(degressive_coef, 2): applied_coef = degressive_coef linear_coef = 0 else: applied_coef = linear_coef else: applied_coef = linear_coef raw_annuity_value = current_value * applied_coef if (not is_last_amortisation_period) and \ getIntervalBetweenDates(current_financial_date, last_financial_date, {'year':1} )['year'] == 1: # It is the last annuity of the period. If we enter in this statement, it means # the amortisation stops, but the item is not fully amortised annuity_value = calculateProrataTemporis(current_financial_date,immo_period_stop_date,raw_annuity_value=raw_annuity_value) else: annuity_value = raw_annuity_value annuities += annuity_value current_financial_date = addToDate(current_financial_date, {'year':1} ) # Return the calculated value returned_value = start_value - annuities if returned_value < 0: returned_value = 0. if with_currency: return '%s %s' % (repr(round(returned_value, 2)), currency) return round(returned_value,2) else: # Unknown amortisation type LOG('ERP5 Warning :', 0, 'Unknown amortisation type. (%s)' % (repr(amortisation_type),)) return None security.declareProtected(Permissions.View, 'getCurrentAmortisationPrice') def getCurrentAmortisationPrice(self, with_currency=0, **kw): """ Returns the deprecated value of item at current time """ return self.getAmortisationPrice (at_date = DateTime(), with_currency=with_currency, **kw) security.declareProtected(Permissions.ModifyPortalContent, 'immobilise') def immobilise(self, **kw): """ Create the immobilisation movement to immobilise the item """ return self._createImmobilisationMovement(immobilisation_state = 1, **kw) security.declareProtected(Permissions.ModifyPortalContent, 'unimmobilise') def unimmobilise(self, **kw): """ Create the immobilisation movement to unimmobilise the item """ return self._createImmobilisationMovement(immobilisation_state = 0, **kw) security.declareProtected(Permissions.ModifyPortalContent, '_createImmobilisationMovement') def _createImmobilisationMovement(self, immobilisation_state, **kw): """ Build a new Immobilisation Movement into the current Item """ new_id = str(self.generateNewId()) self.newContent(portal_type = "Immobilisation", id=new_id) immobilisation = self[new_id] immobilisation.setStopDate(DateTime()) immobilisation.setImmobilisation(immobilisation_state) self.expandAmortisation() return 1 security.declareProtected(Permissions.ModifyPortalContent, '_createAmortisationRule') def _createAmortisationRule(self): my_applied_rule_list = self.getCausalityRelatedValueList(portal_type='Applied Rule') if len(my_applied_rule_list) == 0: # Create a new applied order rule (portal_rules.order_rule) portal_rules = getToolByName(self, 'portal_rules') portal_simulation = getToolByName(self, 'portal_simulation') my_applied_rule = portal_rules.default_amortisation_rule.constructNewAppliedRule(portal_simulation) # Set causality my_applied_rule.setCausalityValue(self) elif len(my_applied_rule_list) == 1: # Re expand the rule if possible my_applied_rule = my_applied_rule_list[0] else: # Delete first rules and re expand if possible for my_applied_rule in my_applied_rule_list[:-1]: my_applied_rule.aq_parent._delObject(my_applied_rule.getId()) my_applied_rule = my_applied_rule_list[-1] # We are now certain we have a single applied rule # It is time to expand it my_applied_rule.expand() def expandAmortisation(self): """ Calculate the amortisation annuities for the item """ self.activate().immediateExpandAmortisation() def immediateExpandAmortisation(self): """ Calculate the amortisation annuities for the item """ self._createAmortisationRule() security.declareProtected(Permissions.View, 'getSectionChangeValueList') def getSectionChangeValueList(self, at_date=None): """ Return the list of deliveries which change the item ownership If at_date is None, return the result for all the time XXX To add : a verification on delivery state ; does an item belong to the destination section of a delivery if this delivery is on draft state ? """ def cmpfunc(a,b): """ Compares the objects on their stop_date """ date_a = a.getStopDate() date_b = b.getStopDate() if date_a is None and date_b is None: return 0 if date_a is None or date_a < date_b: return -1 if date_b is None or date_b < date_a: return 1 return 0 raw_list = self.getAggregateRelatedValueList() delivery_list = [] for movement in raw_list: if movement.getPortalType() in self.getPortalMovementTypeList(): date = movement.getStopDate() if date is None: try: date = movement.getParent().getStopDate() except: pass if date is not None and (at_date is None or date - at_date <= 0): current_owner = movement.getDestinationSectionValue() previous_owner = movement.getSourceSectionValue() if current_owner is None: try: current_owner = movement.getParent().getDestinationSectionValue() except: pass if previous_owner is None: try: previous_owner = movement.getParent().getSourceSectionValue() except: pass if current_owner is not None and previous_owner != current_owner: delivery_list.append(movement) delivery_list.sort(cmpfunc) return delivery_list security.declareProtected(Permissions.View, 'getSectionList') def getSectionList(self, at_date=None): """ Return the list of successive owners of the item with the corresponding dates If at_date is None, return the result all the time """ delivery_list = self.getSectionChangeValueList(at_date = at_date) owner_list = [] for delivery in delivery_list: owner_list.append( { 'owner' : delivery.getDestinationSectionValue(), 'date' : delivery.getStopDate() } ) return owner_list security.declareProtected(Permissions.View, 'getSectionValue') def getSectionValue(self, at_date=None): """ Return the owner of the item at the given date If at_date is None, return the last owner without time limit """ owner_list = self.getSectionList(at_date = at_date) if len(owner_list) > 0: return owner_list[-1]['owner'] else: return None security.declareProtected(Permissions.View, 'getCurrentSectionValue') def getCurrentSectionValue(self): """ Return the current owner of the item """ return self.getSectionValue( at_date = DateTime() )