line: quantity_balance, validate,

reconciliation: start/end-quantity
todo: tests

reconciliation.py

@@ -0,0 +1,100 @@
+# -*- coding: utf-8 -*-
+# This file is part of the cashbook-module from m-ds for Tryton.
+# The COPYRIGHT file at the top level of this repository contains the
+# full copyright notices and license terms.
+
+
+from trytond.pool import PoolMeta
+from trytond.model import fields
+from trytond.pyson import Eval
+from decimal import Decimal
+
+
+class Reconciliation(metaclass=PoolMeta):
+    __name__ = 'cashbook.recon'
+
+    start_quantity = fields.Numeric(string='Start Quantity',
+        readonly=True, digits=(16, Eval('quantity_digits', 4)),
+        states={
+            'required': Eval('feature', '') == 'asset',
+            'invisible': Eval('feature', '') != 'asset',
+        }, depends=['quantity_digits', 'feature'])
+    end_quantity = fields.Numeric(string='End Quantity',
+        readonly=True, digits=(16, Eval('quantity_digits', 4)),
+        states={
+            'required': Eval('feature', '') == 'asset',
+            'invisible': Eval('feature', '') != 'asset',
+        }, depends=['quantity_digits', 'feature'])
+    quantity_digits = fields.Function(fields.Integer(string='Quantity Digits'),
+        'on_change_with_quantity_digits')
+    quantity_uom = fields.Function(fields.Many2One(string='Symbol',
+        readonly=True, model_name='product.uom'),
+        'on_change_with_quantity_uom')
+
+    @fields.depends('cashbook', '_parent_cashbook.quantity_uom')
+    def on_change_with_quantity_uom(self, name=None):
+        """ get quantity-unit of asset
+        """
+        if self.cashbook:
+            if self.cashbook.quantity_uom:
+                return self.cashbook.quantity_uom.id
+
+    @fields.depends('cashbook', '_parent_cashbook.quantity_digits')
+    def on_change_with_quantity_digits(self, name=None):
+        """ quantity_digits of cashbook
+        """
+        if self.cashbook:
+            return self.cashbook.currency.digits
+        else:
+            return 4
+
+    @classmethod
+    def default_start_quantity(cls):
+        return Decimal('0.0')
+
+    @classmethod
+    def default_end_quantity(cls):
+        return Decimal('0.0')
+
+    @classmethod
+    def get_values_wfedit(cls, reconciliation):
+        """ get values for 'to_write' in wf-edit
+        """
+        values = super(Reconciliation, cls).get_values_wfedit(reconciliation)
+        values.update({
+            'start_quantity': Decimal('0.0'),
+            'end_quantity': Decimal('0.0'),
+            })
+        return values
+
+    @classmethod
+    def get_values_wfcheck(cls, reconciliation):
+        """ get values for 'to_write' in wf-check
+        """
+        values = super(Reconciliation, cls).get_values_wfcheck(reconciliation)
+
+        if reconciliation.predecessor:
+            values['start_quantity'] = reconciliation.predecessor.end_quantity
+        else :
+            values['start_quantity'] = Decimal('0.0')
+        values['end_quantity'] = values['start_quantity']
+
+        # add quantities of new lines
+        if 'lines' in values.keys():
+            if len(values['lines']) != 1:
+                raise ValueError('invalid number of values')
+
+            values['end_quantity'] += sum([
+                    x.quantity_credit - x.quantity_debit
+                        for x in values['lines'][0][1]
+                ])
+
+        # add quantities of already linked lines
+        values['end_quantity'] += sum([
+                x.quantity_credit - x.quantity_debit
+                    for x in reconciliation.lines
+            ])
+
+        return values
+
+# end Reconciliation