how to use if case in xml?

Question

im making a page with product lines, I want to put an caution message if all product lines do not have a description
what should I do?

Marvin Haß · Answer

you can use an label for it:

<field name="my_value"/>
<label string="the value is abc" attrs="{'invisible' : [('my_value','!=','abc')]}"

In your case "my_value"  sould be an function field (boolean),

An other way is to return return {'warning' : {'title' : 'Title', 'message' : 'message'}} at the create/write method

regards