The error message suggests that the variable "project_id" is not defined in the domain for your search view.

It seems like you are using project_id.court in the domain, but "project_id" is not defined before, you should use self.project_id.court instead of project_id.court.

You should also check if the fields sender_court and project_id.court exist in the project.task model and that you have the right access rights to them.

Also, you may want to check if the field project_id is defined in the project.task model and if it's a many2one field to the project.project model.

Try updating your XML code to something like this:

It should work fine.

If the problem still persists, please provide more details about the error you are facing, such as the exact version of Odoo and the full stack trace of the error message, this will help me to understand the problem more clearly and provide an accurate solution.

[Edited] Hello Firoz,

I am using odoo v15, I tried to use the self keyword but I am getting this error " Name 'self' is not defined "

I fixed the issue by using a stored computed field. 

First:

I created a new field called is_sent_task

is_sent_task = fields.Boolean(default=False, compute='compute_is_sent_task', store=True

Second:

I created a compute method

@api.depends('project_id', 'sender_court')

def _compute_is_sent_task(self):

​for r in self:

​ ​if r.sender_court and r.project_id:

​ ​ ​r.is_sent_task = r.sender_court_id == r.project_id.court.id

​

Third:

I used the is_sent_task in the domain field

[('is_sent_task', '=', True)]

Its work fine now