Ruby on rails Rails-链接HABTM中的现有模型
我有两个这样的模型Ruby on rails Rails-链接HABTM中的现有模型,ruby-on-rails,database,ruby-on-rails-4,rails-activerecord,Ruby On Rails,Database,Ruby On Rails 4,Rails Activerecord,我有两个这样的模型 class Student has_and_belongs_to_many :classrooms end class Classrooms has_and_belongs_to_many :students end 我想把一个学生和数据库中的一个类联系起来, 每当我尝试这样做的时候 classroom = Classroom.find(id) student = Student.find(id) Student.classrooms.create(class
class Student
has_and_belongs_to_many :classrooms
end
class Classrooms
has_and_belongs_to_many :students
end
我想把一个学生和数据库中的一个类联系起来,
每当我尝试这样做的时候
classroom = Classroom.find(id)
student = Student.find(id)
Student.classrooms.create(classroom: classroom)
我得到一个类似这样的错误:
ActiveRecord::UnknownAttributeError: unknown attribute: classroom
教室=教室.查找(教室id)
学生=学生.查找(学生id)
教室,学生
classroom = Classroom.find(classroom_id)
student = Student.find(student_id)
classroom.students << student