core/db/migrate/20140728121353_create_student_review_table.rb
class CreateStudentReviewTable < ActiveRecord::Migration[4.2]
def change
create_table :gaku_student_reviews do |t|
t.references :student
t.references :student_review_category
t.references :student_reviewable, polymorphic: true
t.text :content
t.timestamps
end
end
end