Hello everyone,

I am using Odoo 12 for this purpose
I am having a problem that seems to easy to solve but I simple do not understand where is the problem.

I have a button for which I need to set visibility based on 2 conditions. In this case I am using the button "attributes".

 The conditions are based on 2 fields and if I test the attribute using only one condition at a time, it works as expected:

      Condition 1: ... attrs="{'invisible':[('active','=', False)]}" ...
      Condition 2: ... attrs="{'invisible':[('state','!=','confirm')]}" ...

 In the example above, using the first condition, the button is only shown for all active records. And for the second condition, the button is only shown on records which "state" field is not 'confirm'. So I can confirm that conditions work as expected.

Now, I need to join both conditions on the same button attribute in order to test them with AND operator. I have tried:

     ... attrs="{'invisible':[('active','=', False),('state','!=','confirm')]}" ...

Does not work and also tried with ('state','not in','confirm') and ('active','!=', True).
There's no errors but I am sure none of the conditions is being applied and the button is shown everywhere.

Tried to use a '&':

     ... attrs="{'invisible':['&',('active','=', False),('state','!=','confirm')]}" ...

but I get an error 'doc = etree.parse(xmlfile)....'

Tried to use the corresponding special html character for &  ( & ).
The same result as the first situation. No errors but the conditions are not working.

What could be wrong?

I can ensure that I have records that must meet any of the conditions.

Thank you very much

Regards

PM