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这涉及对连接表的验证，验证连接两侧的活动记录。它似乎没有按预期运行，允许违反验证。

我想让用户能够属于组，（或组到用户，因为它是多对多的）。但用户所在公司必须与集团公司相匹配。因此，UserGroup看起来像这样：

class UserGroup < ActiveRecord::Base
  belongs_to :user
  belongs_to :group

  validate :group_company_matches_user_company


  private
  def group_company_matches_user_company
    if user.company != group.company
      self.errors.add(:group, "company must match user company")
    end
  end
end

现在这是一个显示验证失败的测试：

test 'validation failure example' do
    group = groups(:default)
    user = users(:manager)

    #default user and group have the same company in the DB
    assert_equal user.company, group.company

    #create a 2nd company
    company2 = user.company.dup
    assert_difference 'Company.count', 1 do
      company2.save!
    end

    #set the group's company to the new one, verify user and group's company don't match
    group.company = company2    
    assert_not_equal user.company, group.company

    #WARNING!!! this passes and creates a new UserGroup. even though it violates
    #the UserGroup validation
    assert_difference 'UserGroup.count', 1 do
      group.users << user
    end

    #What about when we save the group to the DB?
    #no issues.
    group.save

    #this will fail. we have saved a UserGroup who's user.company != group.company
    #despite the validation that requires otherwise
    UserGroup.all.each do |ug|
      assert_equal ug.user.company.id, ug.group.company.id
    end
  end
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1 回答 1

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使用此collection << objectTL:DR 绕过验证

通过将对象的外键设置为集合的主键，将一个或多个对象添加到集合中。请注意，此操作会立即触发更新 sql，而无需等待父对象上的保存或更新调用。

于 2013-05-14T20:31:20.300 回答