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私のenrollment.rb

attr_accessible :semester_id
has_many :studentpayments
has_many :student_deductions

私のstudentpayment.rb

belongs_to :enrollment

私のstudent_deduction.rb

belongs_to :enrollment

独自の登録ベースを取得するにはどうすれsemester_idばよいですか。enrollmentstudentpaymentstudent_deduction

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@enrollment = Enrollment.find_by_semester_id(id) # find by semester_id

@enrollment.studentpayments.any? # if @enrollment has any student payments
@enrollment.student_deductions.any?
于 2012-08-31T09:54:56.490 に答える