account_usability: improve display of reconcile information, in particular partial reconcile

Warning: on existing big databases, this upgrade will take a long time
because there is a new computed stored field on account.move.line. But it is
required to keep good perfs on tree view of move lines.

account_usability/account.py

@@ -5,6 +5,7 @@
 
 from odoo import models, fields, api, _
 from odoo.tools import float_compare, float_is_zero
+from odoo.tools.misc import formatLang
 from odoo.exceptions import UserError, ValidationError
 from odoo import SUPERUSER_ID
 import logging
@@ -318,6 +319,13 @@ class AccountMoveLine(models.Model):
     # Update field only to add a string (there is no string in account module)
     invoice_id = fields.Many2one(string='Invoice')
     date_maturity = fields.Date(copy=False)
+    account_reconcile = fields.Boolean(
+        related='account_id.reconcile', readonly=True)
+    full_reconcile_id = fields.Many2one(string='Full Reconcile')
+    matched_debit_ids = fields.One2many(string='Partial Reconcile Debit')
+    matched_credit_ids = fields.One2many(string='Partial Reconcile Credit')
+    reconcile_string = fields.Char(
+        compute='_compute_reconcile_string', string='Reconcile', store=True)
 
     @api.onchange('credit')
     def _credit_onchange(self):
@@ -355,7 +363,6 @@ class AccountMoveLine(models.Model):
             else:
                 self.credit = amount_company_currency
 
-    @api.multi
     def show_account_move_form(self):
         self.ensure_one()
         action = self.env['ir.actions.act_window'].for_xml_id(
@@ -368,6 +375,34 @@ class AccountMoveLine(models.Model):
         })
         return action
 
+    @api.depends(
+            'full_reconcile_id', 'matched_debit_ids', 'matched_credit_ids')
+    def _compute_reconcile_string(self):
+        for line in self:
+            rec_str = False
+            if line.full_reconcile_id:
+                rec_str = line.full_reconcile_id.name
+            else:
+                rec_str = ', '.join([
+                    'a%d' % pr.id for pr in line.matched_debit_ids + line.matched_credit_ids])
+            line.reconcile_string = rec_str
+
+
+class AccountPartialReconcile(models.Model):
+    _inherit = "account.partial.reconcile"
+    _rec_name = "id"
+
+    def name_get(self):
+        res = []
+        for rec in self:
+            # There is no seq for partial rec, so I simulate one with the ID
+            # Prefix for full rec: 'A' (upper case)
+            # Prefix for partial rec: 'a' (lower case)
+            amount_fmt = formatLang(self.env, rec.amount, currency_obj=rec.company_currency_id)
+            name = 'a%d (%s)' % (rec.id, amount_fmt)
+            res.append((rec.id, name))
+        return res
+
 
 class AccountBankStatement(models.Model):
     _inherit = 'account.bank.statement'

account_usability/account_view.xml

@@ -298,8 +298,8 @@ module -->
             <attribute name="context" operation="python_dict" key="default_credit">default_credit</attribute>
             <attribute name="context" operation="python_dict" key="default_debit">default_debit</attribute>
         </xpath>
-        <xpath expr="//field[@name='line_ids']/tree/field[@name='date_maturity']" position="after">
-            <field name="full_reconcile_id"/>
+        <xpath expr="//field[@name='line_ids']/tree/field[@name='credit']" position="after">
+            <field name="reconcile_string"/>
         </xpath>
     </field>
 </record>
@@ -310,7 +310,7 @@ module -->
     <field name="inherit_id" ref="account.view_account_move_line_filter"/>
     <field name="arch" type="xml">
         <field name="partner_id" position="after">
-            <field name="full_reconcile_id" />
+            <field name="reconcile_string" />
         </field>
         <filter name="unreconciled" position="before">
             <filter name="reconciled" string="Fully Reconciled" domain="[('full_reconcile_id', '!=', False)]"/>
@@ -335,7 +335,21 @@ module -->
         </field>
         <field name="move_id" position="after">
             <field name="invoice_id"/>
+            <field name="account_reconcile" invisible="1"/>
         </field>
+        <xpath expr="//field[@name='full_reconcile_id']/.." position="replace">
+            <field name="full_reconcile_id" nolabel="1"/>  <!-- label is already in view -->
+            <field name="matched_debit_ids" readonly="1" widget="many2many_tags" attrs="{'invisible': ['|', ('full_reconcile_id', '!=', False), ('matched_debit_ids', '=', [])]}"/>
+            <field name="matched_credit_ids" readonly="1" widget="many2many_tags" attrs="{'invisible': ['|', ('full_reconcile_id', '!=', False), ('matched_credit_ids', '=', [])]}"/>
+            <field name="reconciled" invisible="1"/>
+            <button name="open_reconcile_view" class="oe_link" type="object"
+                    string="-> View partially reconciled entries" colspan="2"
+                    attrs="{'invisible': ['|', ('full_reconcile_id', '!=', False), '&amp;', ('matched_debit_ids', '=', []),('matched_credit_ids', '=', [])]}"/>
+            <span colspan="2" attrs="{'invisible': ['|', '|', ('full_reconcile_id', '!=', False), ('matched_debit_ids', '!=', []), ('matched_credit_ids', '!=', [])]}" class="o_form_field">No Partial Reconcile</span>
+        </xpath>
+        <xpath expr="//label[@for='full_reconcile_id']/.." position="attributes">
+            <attribute name="attrs">{'invisible': [('account_reconcile', '=', False)]}</attribute>
+        </xpath>
     </field>
 </record>
 
@@ -347,7 +361,7 @@ module -->
         <!-- Move reconcile_id to a better position -->
         <field name="full_reconcile_id" position="replace"/>
         <field name="credit" position="after">
-            <field name="full_reconcile_id"/>
+            <field name="reconcile_string"/>
         </field>
         <field name="date_maturity" position="after">
             <button name="show_account_move_form" type="object" icon="fa-arrows-h" string="Show Journal Entry"/>