Why my XML changes have no effect at all?

Question

I'm trying to list all the products from a parent category, even if they're in a subcategory. Same as asked here: https://www.odoo.com/forum/help-1/question/list-products-in-all-subcategories-10874

I still can't make that work. But on one of my trial-error, I found out that deleting all the .xml files from /Server/server/openerp/addons/product/ has absolutely no effect. I restarted the service few times but the forms keeps working as usual and also the search functions and filters.

I spent all

Brett Lehrer · Accepted Answer

Views are database persistent for performance reasons. The process of installing/upgrading a module loads the views into the table ir_ui_view. Once the module is installed, you can delete all the .xml files you want, it makes no difference. You'll run into a lot of trouble the next time you try to upgrade the product module or one of its dependents, base, decimal_precision, mail, or report.

You need to inherit views to modify them properly. You can also edit the default view as well, but it's not recommended as those changes won't be persistent through a module upgrade.

You need to inherit views to modify them properly.  You can also edit the default view as well, but it

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