Rails has_and_belongs_to_many创建/插入不起作用

Question

我有以下型号 -

class Employee < ActiveRecord::Base
  has_and_belongs_to_many :surveys, join_table: 'employee_surveys'
end


class Survey < ActiveRecord::Base
  has_and_belongs_to_many :employees, join_table: 'employee_surveys'
end

当我执行Employee.first.surveys.create(name: "New Survey")时会产生错误，抱怨employee_id为null ??

Answer 1

我认为你想在这里使用员工类的实例，而不是类本身。

像：

employee = Employee.first
employee.surveys.create(name: "New Survey")