[16.0] col and colspan behaviour

[BT-anieto]

In the views, the way of rendering groups with col and colspan attributes has changed. There is nothing in the migration notes where it is said that the behaviour has changed.

Impacted versions: v16

Steps to reproduce: In a form view, create a page with the next xml:

<page name="page_mapping">
    <group col="3" colspan="4">
        <button name="remove_unused_mapping_fields" string="Remove unused mapping" type="object"/>
         <button name="add_missing_mapping_fields" string="Add missing mapping"  type="object"/>
         <button name="fill_mapping_fields" string="Reset mapping" type="object" confirm="Are you sure? All the mapping values will be overwritten"/>
     </group>
     <group>
         <field name="edi_mapping_fields_ids" nolabel="1" context="{'default_edi_instance_id': id}" attrs="{'readonly': [('odoo_model_id', '=', False)]}"/>
     </group>
</page>

Current behavior:

Expected behavior:

Same behaviour in (at least) v12, v13 and v15

Video/Screenshot link (optional):

Support ticket number submitted via odoo.com/help (optional):

[javierjcf]

I notice that if you want to display a one2Many field inside a page (like before), you need to put it outside a group tag, or within a group tag but with colspan="2". I dont know if it's a bug or a new behavior of bootstrap version.

[vava-odoo]

Hi @BT-anieto and @javierjcf

There were a few changes in 16. You'll probably find your answer by looking at this PR message: https://github.com/odoo/odoo/pull/102119 Hope it helps.

Regards,