How to set current_user to the field

Suppose you want to track who created a project so you want to set current_user to the field. You could do this in app/models/project.rb:

rails_admin do edit do configure :user do visible false end

field :user_id, :hidden do
  visible true
  default_value do
    bindings[:view]._current_user.id
  end
end

end end

This only hides the field and sets the default value, but it not secure. This default value can be overriden in POST request. So instead use your ability file to do this:

can :create, Project, user_id: user.id if user

You can allow to change this user in edit action.

rails_admin do
    edit do
      field :name
      field :description
      field :user do
        visible do
          ! bindings[:object].new_record?
        end
      end
    end
  end
end