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<div class="document" id="onchange-helper">
<h1 class="title">Onchange Helper</h1>
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<p><a class="reference external image-reference" href="https://odoo-community.org/page/development-status"><img alt="Beta" src="https://img.shields.io/badge/maturity-Beta-yellow.png" /></a> <a class="reference external image-reference" href="http://www.gnu.org/licenses/agpl-3.0-standalone.html"><img alt="License: AGPL-3" src="https://img.shields.io/badge/licence-AGPL--3-blue.png" /></a> <a class="reference external image-reference" href="https://github.com/OCA/server-tools/tree/17.0/onchange_helper"><img alt="OCA/server-tools" src="https://img.shields.io/badge/github-OCA%2Fserver--tools-lightgray.png?logo=github" /></a> <a class="reference external image-reference" href="https://translation.odoo-community.org/projects/server-tools-17-0/server-tools-17-0-onchange_helper"><img alt="Translate me on Weblate" src="https://img.shields.io/badge/weblate-Translate%20me-F47D42.png" /></a> <a class="reference external image-reference" href="https://runboat.odoo-community.org/builds?repo=OCA/server-tools&amp;target_branch=17.0"><img alt="Try me on Runboat" src="https://img.shields.io/badge/runboat-Try%20me-875A7B.png" /></a></p>
<p>This is a technical module. Its goal is to ease the play of onchange
method directly called from Python code.</p>
<p><strong>Table of contents</strong></p>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#usage" id="toc-entry-1">Usage</a></li>
<li><a class="reference internal" href="#known-issues-roadmap" id="toc-entry-2">Known issues / Roadmap</a></li>
<li><a class="reference internal" href="#bug-tracker" id="toc-entry-3">Bug Tracker</a></li>
<li><a class="reference internal" href="#credits" id="toc-entry-4">Credits</a><ul>
<li><a class="reference internal" href="#authors" id="toc-entry-5">Authors</a></li>
<li><a class="reference internal" href="#contributors" id="toc-entry-6">Contributors</a></li>
<li><a class="reference internal" href="#maintainers" id="toc-entry-7">Maintainers</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="usage">
<h1><a class="toc-backref" href="#toc-entry-1">Usage</a></h1>
<p>To use this module, you need to:</p>
<ul class="simple">
<li>depend on this module</li>
<li>call yourmodel.play_onchanges(values, [field])</li>
</ul>
<p>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)</p>
<blockquote>
<p>vals = {partner_id: 1}</p>
<p>vals = self.env[sale.order].play_onchanges(vals, [partner_id])</p>
</blockquote>
<p>Then, vals will be updated with partner_invoice_id, partner_shipping_id,
pricelist_id, etc…</p>
<p>Default values will be used to process onchange methods, if respective
fields are not set in vals. You can get them if you pass fields name in
the list of fields.</p>
<blockquote>
<p>vals = {partner_id: 1}</p>
<p>vals = self.env[sale.order].play_onchanges(vals, [partner_id,
date_order])</p>
</blockquote>
<p>vals will contain, in addition to the changed values, the default value
for date_order</p>
<p>You can also use it on existing record for example:</p>
<blockquote>
<p>vals = {partner_shipping_id: 1}</p>
<p>vals = sale.play_onchanges(vals, [partner_shipping_id])</p>
</blockquote>
<p>Then the onchange will be played with the vals passed and the existing
vals of the sale. vals will be updated with partner_invoice_id,
pricelist_id, etc..</p>
<p>Behind the scene, play_onchanges will execute <strong>all the methods</strong>
registered for the list of changed fields, so you do not have to call
manually each onchange. To avoid performance issue when the method is
called on a record, the record will be transformed into a memory record
before calling the registered methods to avoid to trigger SQL updates
command when values are assigned to the record by the onchange</p>
<p>Notes:</p>
<ul class="simple">
<li>Order in onchange_fields is very important as onchanges methods will
be played in that order.</li>
<li>If you use memory object in vals, be award that onchange method in
base model call self.invalidate_cache() that reset it.</li>
</ul>
</div>
<div class="section" id="known-issues-roadmap">
<h1><a class="toc-backref" href="#toc-entry-2">Known issues / Roadmap</a></h1>
<p>Note that onchanges tend to disappear due to the introduction of
computed stored readonly False fields in most cases. When migrating,
it is best to prefer changing it to that way instead of using this
module.</p>
</div>
<div class="section" id="bug-tracker">
<h1><a class="toc-backref" href="#toc-entry-3">Bug Tracker</a></h1>
<p>Bugs are tracked on <a class="reference external" href="https://github.com/OCA/server-tools/issues">GitHub Issues</a>.
In case of trouble, please check there if your issue has already been reported.
If you spotted it first, help us to smash it by providing a detailed and welcomed
<a class="reference external" href="https://github.com/OCA/server-tools/issues/new?body=module:%20onchange_helper%0Aversion:%2017.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**">feedback</a>.</p>
<p>Do not contact contributors directly about support or help with technical issues.</p>
</div>
<div class="section" id="credits">
<h1><a class="toc-backref" href="#toc-entry-4">Credits</a></h1>
<div class="section" id="authors">
<h2><a class="toc-backref" href="#toc-entry-5">Authors</a></h2>
<ul class="simple">
<li>Akretion</li>
<li>Camptocamp</li>
</ul>
</div>
<div class="section" id="contributors">
<h2><a class="toc-backref" href="#toc-entry-6">Contributors</a></h2>
<ul class="simple">
<li>Guewen Baconnier &lt;<a class="reference external" href="mailto:guewen.baconnier&#64;camptocamp.com">guewen.baconnier&#64;camptocamp.com</a>&gt;</li>
<li>Florian da Costa &lt;<a class="reference external" href="mailto:florian.dacosta&#64;akretion.com">florian.dacosta&#64;akretion.com</a>&gt;</li>
<li>Andrea Stirpe &lt;<a class="reference external" href="mailto:a.stirpe&#64;onestein.nl">a.stirpe&#64;onestein.nl</a>&gt;</li>
<li>Souheil Bejaoui &lt;<a class="reference external" href="mailto:souheil.bejaoui&#64;acsone.eu">souheil.bejaoui&#64;acsone.eu</a>&gt;</li>
<li>Kevin Khao &lt;<a class="reference external" href="mailto:kevin.khao&#64;akretion.com">kevin.khao&#64;akretion.com</a>&gt;</li>
</ul>
</div>
<div class="section" id="maintainers">
<h2><a class="toc-backref" href="#toc-entry-7">Maintainers</a></h2>
<p>This module is maintained by the OCA.</p>
<a class="reference external image-reference" href="https://odoo-community.org"><img alt="Odoo Community Association" src="https://odoo-community.org/logo.png" /></a>
<p>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.</p>
<p>This module is part of the <a class="reference external" href="https://github.com/OCA/server-tools/tree/17.0/onchange_helper">OCA/server-tools</a> project on GitHub.</p>
<p>You are welcome to contribute. To learn how please visit <a class="reference external" href="https://odoo-community.org/page/Contribute">https://odoo-community.org/page/Contribute</a>.</p>
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