Unreconcile lines when cancelling statement

As it is not allowed to delete a move with lines reconciled.

issue4017
review37631002

CHANGELOG

@@ -1,3 +1,5 @@
+* Unreconcile lines when cancelling statement
+
 Version 4.4.0 - 2017-05-01
 * Bug fixes (see mercurial logs for details)
 * Add statement line number as move description

statement.py

@@ -719,7 +719,14 @@ class Line(sequence_ordered(), ModelSQL, ModelView):
 
     @classmethod
     def delete_move(cls, lines):
-        Move = Pool().get('account.move')
+        pool = Pool()
+        Move = pool.get('account.move')
+        Reconciliation = pool.get('account.move.reconciliation')
+
+        reconciliations = [l.reconciliation
+            for line in lines for l in line.move.lines
+            if line.move and l.reconciliation]
+        Reconciliation.delete(reconciliations)
         Move.delete(list({l.move for l in lines if l.move}))
 
     def get_move_line(self):

tests/scenario_account_statement.rst

@@ -210,6 +210,26 @@ Validate statement::
     >>> statement.state
     u'validated'
 
+Cancel statement::
+
+    >>> statement.click('cancel')
+    >>> statement.state
+    u'cancel'
+    >>> filter(None, [l.move for l in statement.lines])
+    []
+
+Reset to draft, validate and post statement::
+
+    >>> statement.click('draft')
+    >>> statement.state
+    u'draft'
+    >>> statement.click('validate_statement')
+    >>> statement.state
+    u'validated'
+    >>> statement.click('post')
+    >>> statement.state
+    u'posted'
+
 Test posted moves::
 
     >>> statement_line = statement.lines[0]