kategorie: sperrt 'Typ' wenn parent existiert, korrekte Anpassung

der sub-kategorien bei Änderung + test
Line: Kategoriefeld prüft Inhalt + tests

line.py

@@ -5,7 +5,7 @@
 
 from trytond.model import ModelView, ModelSQL, Workflow, fields, Check
 from trytond.pool import Pool
-from trytond.pyson import Eval, If, Or
+from trytond.pyson import Eval, If, Or, Bool
 from trytond.transaction import Transaction
 from trytond.report import Report
 from trytond.exceptions import UserError
@@ -53,7 +53,12 @@ class Line(Workflow, ModelSQL, ModelView):
         states=STATES, depends=DEPENDS)
     category = fields.Many2One(string='Category', required=True,
         model_name='cashbook.category', ondelete='RESTRICT',
-        states=STATES, depends=DEPENDS+['bookingtype'],
+        states={
+            'readonly': Or(
+                STATES['readonly'],
+                Bool(Eval('bookingtype')) == False,
+                ),
+        }, depends=DEPENDS+['bookingtype'],
         domain=[
             If(
                 Eval('bookingtype', '').in_(['in', 'mvin']),