I want to prevent Project Managers editing the Project Settings of Projects that they are not the managers of.

For example, employee A and employee B both belong to the Project Manager group.  Employee A is the Project Manager of Project A.  Employee B is only a project team member of Project A and should not be able to edit its project settings.

I have the following rule:

['|',('project_id.user_id','=',user.id),('user_id','=',user.id)]

applied to the Task object and that successfully prevents employee B from editing tasks that are not assigned to him, but if I duplicate the rule and apply it to the Project object I get the following error:

ValueError: Invalid field 'project_id.user_id' in leaf "<osv.ExtendedLeaf: ('project_id.user_id', '=', 18) on project_project (ctx: )>"

Can anyone help?