Hello everybody, I would like to make my form fields readonly in my model based on a condition, I'm trying it with fields_view_get for not add "attrs readonly" in each field in my xml file, I have the following code:

@api.model 

 def fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):

 doc = etree.XML(res['arch']) 

 for field in res['fields']: 

 for node in doc.xpath("//field[@name='%s']" % field): 

node.set("readonly", "1") 

setup_modifiers(node, res['fields'][field]) 

res['arch'] = etree.tostring(doc) 

return res

But it doesn't work, what could be my problem? Thank you so much!