Question

有多对多关系，但不断收到同样的错误：ActiveModel :: UnknownAttributeError：EmployeeSkill的未知属性'employee_id'。我已经检查了我的模型，看起来我有两个ID，所以不知道该怎么做？

class Skill < ApplicationRecord

  validates :skill_name, presence: true, length: { minimum: 3, maximum: 30}
  validates_uniqueness_of :skill_name

  has_many :employee_skills
  has_many :employees, through: :employee_skills
end

...

class Employee < ApplicationRecord

  before_save { self.email = email.downcase }

  #validates :email, presence: true, length: { maximum: 30 }
  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :email, presence: true, length: { maximum: 255 },
                format: { with: VALID_EMAIL_REGEX },
                uniqueness: { case_sensitive: false }

  has_many :employee_skills
  has_many :skills, through: :employee_skills
end

...

class EmployeeSkill < ApplicationRecord
  belongs_to :employee
  belongs_to :skill
end

Answer 1

1）检查迁移文件和数据库中是否有相应的ID。

2）重启服务器（很奇怪但有时需要）。

您的代码看起来不错，所以我认为是我提到的两种情况之一。

此致

ActiveModel :: UnknownAttributeError：EmployeeSkill的未知属性'employee_id'

1 个答案: