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modules/project_invoice/timesheet.py

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+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from trytond.i18n import gettext
+from trytond.model import fields
+from trytond.model.exceptions import AccessError
+from trytond.pool import PoolMeta
+
+
+class Line(metaclass=PoolMeta):
+    __name__ = 'timesheet.line'
+    invoice_line = fields.Many2One('account.invoice.line', 'Invoice Line',
+        readonly=True)
+
+    @classmethod
+    def copy(cls, records, default=None):
+        if default is None:
+            default = {}
+        else:
+            default = default.copy()
+        default.setdefault('invoice_line', None)
+        return super().copy(records, default=default)
+
+    @classmethod
+    def check_modification(cls, mode, lines, values=None, external=False):
+        super().check_modification(
+            mode, lines, values=values, external=external)
+        if mode == 'write':
+            if (values.keys() & {'duration', 'work'}
+                    and any(l.invoice_line for l in lines)):
+                line = next(l for l in lines if l.invoice_line)
+                if 'duration' in values:
+                    msg = 'msg_invoiced_timesheet_line_modify_duration'
+                else:
+                    msg = 'msg_invoiced_timesheet_line_modify_work'
+                raise AccessError(gettext(
+                        f'project_invoice.{msg}',
+                        line=line.rec_name))
+        elif mode == 'delete':
+            if any(r.invoice_line for r in lines):
+                line = next((l for l in lines if l.invoice_line))
+                raise AccessError(gettext(
+                        'project_invoice.msg_invoiced_timesheet_line_delete',
+                        line=line.rec_name))