Add force draft by account admin

statement.py

@@ -47,6 +47,15 @@ class Statement(metaclass=PoolMeta):
     @classmethod
     def __setup__(cls):
         super(Statement, cls).__setup__()
+        cls._transitions |= set((
+            ('posted', 'draft'),
+        ))
+        cls._buttons.update({
+            'force_draft': {
+                'invisible': Eval('state') != 'posted',
+                'depends': ['state'],
+            },
+        })
 
     @classmethod
     def cron_autopost(cls):
@@ -73,15 +82,13 @@ class Statement(metaclass=PoolMeta):
 
     @classmethod
     def get_users(cls, statements, names):
-        return {
-            'users':
+        return {'users':
                 {s.id: [
                     u.id
                     for j in s.journal
                     for d in j.devices
                     for u in d.users
-                    ]
-                } for s in statements}
+                ]} for s in statements}
 
     @classmethod
     def search_users(cls, name, clause):
@@ -124,6 +131,12 @@ class Statement(metaclass=PoolMeta):
     #             })
     #     MoneyCount.create(money_to_create)
 
+    @classmethod
+    @ModelView.button
+    @Workflow.transition('draft')
+    def force_draft(cls, statements):
+        pass
+
     @classmethod
     def create_move(cls, statements):
         '''Create move for the statements and try to reconcile the lines.

statement.xml

@@ -263,5 +263,17 @@ copyright notices and license terms. -->
           <field name="type">tree</field>
           <field name="name">additional_income_tree</field>
         </record>
+
+        <record model="ir.model.button" id="account_statement_force_draft_button">
+            <field name="name">force_draft</field>
+            <field name="string">Force Draft</field>
+            <field name="confirm">Are you sure you want to force draft account statement posted?</field>
+            <field name="model" search="[('model', '=', 'account.statement')]"/>
+        </record>
+        <record model="ir.model.button-res.group"
+            id="account_statement_force_draft_button_group_account">
+            <field name="button" ref="account_statement_force_draft_button"/>
+            <field name="group" ref="account.group_account_admin"/>
+        </record>
     </data>
 </tryton>

view/statement_form.xml

@@ -24,6 +24,7 @@ copyright notices and license terms. -->
     <xpath expr="/form/notebook/page[@id='info']/field[@name='company']" position="after">
         <label name="salesman"/>
         <field name="salesman"/>
+        <button name="force_draft" string="Force Draft" icon="tryton-forward"/>
     </xpath>
     <xpath expr="/form/notebook/page[@id='info']" position="after">
         <page string="Expenses" id="count_money_tree">