book/line: felder für quantity, etc.

line.py

@@ -0,0 +1,69 @@
+# -*- 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 decimal import Decimal
+from trytond.model import fields
+from trytond.pool import PoolMeta
+from trytond.pyson import Eval, Or, If
+from trytond.modules.cashbook.line import STATES, DEPENDS
+
+
+class Line(metaclass=PoolMeta):
+    __name__ = 'cashbook.line'
+
+    quantity = fields.Numeric(string='Quantity',
+        digits=(16, Eval('quantity_digits', 4)),
+        states={
+            'required': Eval('feature', '') == 'asset',
+            'invisible': Eval('feature', '') != 'asset',
+            'readonly': Or(
+                STATES['readonly'],
+                Eval('bookingtype', '').in_(['spin', 'spout']),
+                ),
+        }, depends=DEPENDS+['feature', 'quantity_digits', 'bookingtype'])
+    quantity_digits = fields.Function(fields.Integer(string='Digits',
+        readonly=True, states={'invisible': True}),
+        'on_change_with_quantity_digits')
+    quantity_uom = fields.Function(fields.Many2One(string='Symbol',
+        readonly=True, model_name='product.uom'),
+        'on_change_with_quantity_symbol')
+    asset_rate = fields.Function(fields.Numeric(string='Rate',
+        readonly=True,
+        digits=(16, If(
+            Eval('currency_digits', 2) > Eval('quantity_digits', 2),
+            Eval('currency_digits', 2), Eval('quantity_digits', 2)))),
+        'on_change_with_asset_rate')
+    #asset_ratesymbol = fields.
+
+    @fields.depends('quantity', 'amount', 'currency_digits', 'quantity_digits')
+    def on_change_with_asset_rate(self, name=None):
+        """ get rate
+        """
+        if (self.quantity is None) or (self.amount is None):
+            return
+        digit = max(
+            self.currency_digits if self.currency_digits is not None else 2,
+            self.quantity_digits if self.quantity_digits is not None else 4)
+        if self.quantity != Decimal('0.0'):
+            return (
+                    self.amount / self.quantity
+                ).quantize(Decimal(str(1/10**digit)))
+
+    @fields.depends('cashbook', '_parent_cashbook.quantity_uom')
+    def on_change_with_quantity_symbol(self, name=None):
+        """ get quantity-symbol of asset
+        """
+        if self.cashbook:
+            return self.cashbook.quantity_uom.id
+
+    @fields.depends('cashbook', '_parent_cashbook.quantity_digits')
+    def on_change_with_quantity_digits(self, name=None):
+        """ get digits from cashbook
+        """
+        if self.cashbook:
+            return self.cashbook.quantity_digits
+        return 4
+
+# end LineContext