[FIX] web,mail: Call on_attach_callback when appending content

Before this commit, the form renderer would call "on_attach_callback"
only when the whole _render process was over. The problem was that this
process is asynchronous and this callback should be invoked as soon as
the widgets are appended.

As such, any asynchronous operation is performed before appending the
content in a new function "__renderView".

Task 2346540

closes odoo/odoo#60791

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/addons/web/static/src/js/views/basic/basic_renderer.js b/addons/web/static/src/js/views/basic/basic_renderer.js
index 16ecc473915..a03b9b41a77 100644
--- a/addons/web/static/src/js/views/basic/basic_renderer.js
+++ b/addons/web/static/src/js/views/basic/basic_renderer.js
@@ -684,7 +684,7 @@ var BasicRenderer = AbstractRenderer.extend(WidgetAdapterMixin, {
         if (this._isInDom) {
             for (const handle in this.allFieldWidgets) {
                 this.allFieldWidgets[handle].forEach(widget => {
-                    if (widget.on_attach_callback) {
+                    if (!utils.isComponent(widget.constructor) && widget.on_attach_callback) {
                         widget.on_attach_callback();
                     }
                 });
@@ -694,6 +694,8 @@ var BasicRenderer = AbstractRenderer.extend(WidgetAdapterMixin, {
                     widget.on_attach_callback();
                 }
             });
+            // call on_attach_callback on child components (including field components)
+            WidgetAdapterMixin.on_attach_callback.call(this);
         }
     },
     /**