Agrega un nuevo campo cobrador en account voucher.

__init__.py

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+# -*- coding: utf-8 -*-
+
+from . import models

__openerp__.py

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+# -*- coding: utf-8 -*-
+# 'views/eiru_contract_vendor.xml',
+{
+    'name': 'Eiru account voucher vendor',
+    'summary': 'Voucher Vendor',
+    'category': 'extra',
+    'version': '0.1',
+    'description': """
+    """,
+    'author': 'Eiru Software',
+    'website': 'https://www.eiru.com.py',
+    'depends': [
+        'base',
+        'account',
+        'eiru_contract_vendor',
+        'sale',
+        'hr',
+    ],
+    'data': [
+        'views/account_voucher_view.xml'
+    ],
+    'test': [
+    ],
+    'installable': True,
+}

models/__init__.py

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+# -*- coding: utf-8 -*-
+
+# from . import res_partner
+from . import account_voucher

models/account_voucher.py

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+# -*- encoding: utf-8 -*-
+#################################################################################
+#                                                                               #
+#    This program is free software: you can redistribute it and/or modify       #
+#    it under the terms of the GNU Affero General Public License as             #
+#    published by the Free Software Foundation, either version 3 of the         #
+#    License, or (at your option) any later version.                            #
+#                                                                               #
+#    This program is distributed in the hope that it will be useful,            #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of             #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              #
+#    GNU Affero General Public License for more details.                        #
+#                                                                               #
+#    You should have received a copy of the GNU Affero General Public License   #
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.      #
+#                                                                               #
+#################################################################################
+
+from openerp import models, fields, api
+
+class account_voucher(models.Model):
+    _inherit = 'account.voucher'
+    _name = 'account.voucher'
+
+    employee_id = fields.Many2one(string='Cobrador', related="partner_id.employee_id")

models/res_partner.py

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+# -*- coding: utf-8 -*-
+
+from openerp import models, fields, api
+
+class ResPartnerVendor(models.Model):
+    _inherit = 'res.partner'
+
+    employee_id = fields.Many2one('hr.employee', string='Cobrador')

views/account_voucher_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+
+<openerp>
+    <data>
+      <record id="account_voucher_vendor_view" model="ir.ui.view">
+          <field name="name">account.voucher.vendor</field>
+          <field name="model">account.voucher</field>
+          <field name="inherit_id" ref="account_voucher.view_vendor_receipt_form"/>
+          <field name="arch" type="xml">
+              <field name="journal_id" position="after">
+                  <field name="employee_id" attrs="{'readonly':False}"/>
+              </field>
+          </field>
+      </record>
+
+      <record id="view_voucher_tree" model="ir.ui.view">
+          <field name="name">view_voucher_tree</field>
+          <field name="model">account.voucher</field>
+          <field name="inherit_id" ref="account_voucher.view_voucher_tree"/>
+          <field name="arch" type="xml">
+              <field name="reference" position="after">
+                  <field name="employee_id"></field>
+              </field>
+          </field>
+       </record>
+
+        <record id="view_accountvoucher_filter_search1" model="ir.ui.view">
+            <field name="name">accountvoucher.filter.search1</field>
+            <field name="model">account.voucher</field>
+            <field name="inherit_id" ref="account_voucher.view_voucher_filter_customer_pay" />
+            <field name="arch" type="xml">
+              <search>
+                  <field name="employee_id"/>
+                  <separator/>
+                  <group string="Agrupar por">
+                      <filter string="Cobrador" context="{'group_by':'employee_id'}"/>
+                  </group>
+               </search>
+            </field>
+        </record>
+
+    </data>
+</openerp>

views/eiru_contract_vendor.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+  <data>
+    <record model="ir.ui.view" id="contract_vendor_form">
+      <field name="name">contract_vendor_form</field>
+      <field name="model">account.analytic.account</field>
+      <field name="inherit_id" ref="analytic.view_account_analytic_account_form"/>
+      <field name="arch" type="xml">
+      <field name="manager_id" position="before">
+          <field name="employee_id"/>
+          </field>
+      </field>
+    </record>
+ </data>
+</openerp>

views/res_partner.xml

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+<?xml version="1.0"?>
+<openerp>
+    <data>
+
+        <record id="res_partner_vendor_form" model="ir.ui.view">
+            <field name="name">res.partner.vendor.form</field>
+            <field name="model">res.partner</field>
+            <field name="inherit_id" ref="base.view_partner_form"/>
+            <field name="arch" type="xml">
+                <field name="title" position="after">
+                     <field name="employee_id"/>
+                </field>
+            </field>
+        </record>
+    </data>
+</openerp>