Today when I try to do a multiple relations, I end up with this error.
undefined method `assert_valid_keys'
First I checked on my relations. But everything seems to be okay with it.
This is made me so crazy. I don’t know what is happening here. Finally I found a reason why?
** You shouldn’t put multiple relations on the same line
|belongs_to :user, :expense_report_status|
I don’t know why? but I will find out later. Maybe someone can give me a suggestion with this.