Aaron Bohy
b558cb7996
Before this commit, defining a extension of a template by using the
combination of directives 't-name' and 't-extend' ignored potential
extensions that could have been defined beforehand.
For instance, let's assume the following templates.
```xml
<t t-name="a">
<div><span>1</span></div>
</t>
<t t-extend="a">
<t t-jquery="span" t-operation="replace">
<span>2</span>
</t>
</t>
<t t-name="b" t-extend="a">
<t t-jquery="div" t-operation="append">
<span>b</span>
</t>
</t>
```
Rendering template "b" displayed "1b" whereas we would expect "2b".
Moreover, when the extended template is itself an extension of
another template:
```xml
<t t-name="a">
<div><span>a</span></div>
</t>
<t t-name="b" t-extend="a">
<t t-jquery="div" t-operation="append">
<span>b</span>
</t>
</t>
<t t-name="c" t-extend="b">
<t t-jquery="div" t-operation="append">
<span>c</span>
</t>
</t>
```
Rendering template "a" displayed "a", template "b" displayed "ab",
but template "c" displayed "ac", whereas we would expect "abc".
With this commit, other extensions done to a template are kept when
a new extension is defined. It relies on the templates order, and
takes into account all extensions that have *already* been defined.
This is exactly how the new qweb inheritance mechanism (using
't-inherit' and 't-inherit-mode') behaves.
closes odoo/odoo#54315
Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>
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