Hi
I'm new to Rails. I'm trying to make an app where students can login in and signup for the exam. I have a problem filtering data, where a student can only see exams which belong to her/his year and department.
Subject has the following columns:
scope :department, -> (department) { where('department == ?', department) }scope :year, -> (year) { where('subject.year == ?', year) }Then I called these methods in exams controller (index action) and passed the data:@exams = Exam.department(current_user.department) && Exam.year(current_user.year)There is a problem with a scope year, it doesn't recognize subject. When I try to access the list of exams it says this:SQLite3::SQLException: no such column: subject.year: SELECT "exams".* FROM "exams" WHERE (subject.year == 2)But when I include subject_id: scope :year, -> (year) { where('Subject.find(:subject_id).year == ?', year) }It says there is a syntax error: SQLite3::SQLException: near "(": syntax error: SELECT "exams".* FROM "exams" WHERE (Subject.find(:subject_id).year == 2).I have tried accessing subject attributes by using delegate and to_params, but it didn't help. I've been googling this issue for more than 10 days, but I haven't been able to find a solution.