Add onchange_helper module

onchange_helper/README.rst

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+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+   :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+   :alt: License: AGPL-3
+
+===============
+Onchange Helper
+===============
+
+This is a technical module. Its goal is to ease the play of onchange method directly called from python file.
+
+Usage
+=====
+
+To use this module, you need to:
+
+* depend on this module
+* call `yourmodel.play_onchanges(values, ['field'])`
+
+Example if you want to create a sale order and you want to get the values relative to partner_id field (as if you fill the field from UI)
+
+    `vals = {'partner_id: 1'}`
+
+    `vals = self.env['sale.order'].play_onchange(vals, ['partner_id'])`
+
+Then, `vals` will be updated with partner_invoice_id, partner_shipping_id, pricelist_id, etc...
+
+For further information, please visit:
+
+* https://www.odoo.com/forum/help-1
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/OCA/server-tools/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smashing it by providing a detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* Odoo Community Association: `Icon <https://github.com/OCA/maintainer-tools/blob/master/template/module/static/description/icon.svg>`_.
+
+Contributors
+------------
+
+* Guewen Baconnier <guewen.baconnier@camptocamp.com>
+* Florian da Costa <florian.dacosta@akretion.com>
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+To contribute to this module, please visit https://odoo-community.org.
+

onchange_helper/__init__.py

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+# -*- coding: utf-8 -*-
+# © 2016 Akretion (http://www.akretion.com)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import models

onchange_helper/__openerp__.py

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+# -*- coding: utf-8 -*-
+# © 2016 Akretion (http://www.akretion.com)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+{'name': 'Onchange Helper',
+ 'version': '9.0.1.0.0',
+ 'author': 'Akretion,Camp2camp,Odoo Community Association (OCA)',
+ 'website': 'www.akretion.com',
+ 'license': 'AGPL-3',
+ 'category': 'Generic Modules',
+ 'depends': [
+     'base',
+ ],
+ 'installable': True,
+ }

onchange_helper/models/__init__.py

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+# -*- coding: utf-8 -*-
+# © 2016 Akretion (http://www.akretion.com)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import ir_rule

onchange_helper/models/ir_rule.py

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+# -*- coding: utf-8 -*-
+# © 2016 Akretion (http://www.akretion.com)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from openerp import api, models
+
+
+def get_new_values(model, record, on_change_result):
+    vals = on_change_result.get('value', {})
+    new_values = {}
+    for fieldname, value in vals.iteritems():
+        if fieldname not in record:
+            column = model._fields[fieldname]
+            if column.type == 'many2one':
+                value = value[0]  # many2one are tuple (id, name)
+            new_values[fieldname] = value
+    return new_values
+
+
+@api.model
+def play_onchanges(self, values, onchange_fields):
+    onchange_specs = self._onchange_spec()
+    # we need all fields in the dict even the empty ones
+    # otherwise 'onchange()' will not apply changes to them
+    all_values = values.copy()
+    for field in self._fields:
+        if field not in all_values:
+            all_values[field] = False
+
+    # we work on a temporary record
+    new_record = self.new(all_values)
+
+    new_values = {}
+    for field in onchange_fields:
+        onchange_values = new_record.onchange(all_values,
+                                              field, onchange_specs)
+        new_values.update(get_new_values(self, values, onchange_values))
+        all_values.update(new_values)
+
+    res = {f: v for f, v in all_values.iteritems()
+           if f in values or f in new_values}
+    return res
+
+
+class IrRule(models.Model):
+    _inherit = 'ir.rule'
+
+    def _setup_complete(self, cr, uid):
+        if not hasattr(models.BaseModel, 'play_onchanges'):
+            setattr(models.BaseModel, 'play_onchanges', play_onchanges)
+        return super(IrRule, self)._setup_complete(cr, uid)