Rails collection_singular_ids

Rails 中,如何在 Post/Patch 表单中创建关联关系?

答案是使用 collection_singular_ids

Controller:

def create
  Student.new(student_params)
end

def update
  @student.update(student_params)
end

private

def student_params
  params.require(:student).permit(lesson_ids: [])
end

约定优于配置 ❤