Question

我有模特

class Owner < ActiveRecord::Base
  attr_accessible :telephone
  validates_uniqueness_of :telephone
  validates_telephone_number_of :telephone
  before_validation :telephone_normalize
end

在rails console中

a = Owner.new(:telephone => '949123456')
=> #<Owner id: nil, telephone: "949123456", created_at: nil, updated_at: nil> 
1.9.3-p362 :002 > a.valid?
Owner Exists (0.1ms)  SELECT 1 AS one FROM "owners" WHERE "owners"."telephone" = '+421949123456' LIMIT 1
=> false
1.9.3-p362 :003 > a
=> #<Owner id: nil, telephone: "421949123456", created_at: nil, updated_at: nil>

同样，当我保存唯一号码时：

1.9.3-p362 :006 > a.telephone = '949123457'
=> "949123457" 
1.9.3-p362 :007 > a.save
(0.1ms)  begin transaction
Owner Exists (0.2ms)  SELECT 1 AS one FROM "owners" WHERE "owners"."telephone" = '+421949123457' LIMIT 1
SQL (2.3ms)  INSERT INTO "owners" ("created_at", "telephone", "updated_at") VALUES (?, ?, ?)  [["created_at", Wed, 16 Jan 2013 11:55:44 UTC +00:00], ["telephone", "421949123457"], ["updated_at", Wed, 16 Jan 2013 11:55:44 UTC +00:00]]
(88.3ms)  commit transaction
=> true

Rails（3.2.11）在数字的开头省略了'+'。数字类型是字符串。它也保存它没有加号（如果它是唯一的），但在验证时，它用加号调用。

我做错了什么？

Answer 1

它认为数据库中的电话列是整数类型。所以你传递的字符串超出了它的范围。这就是你遇到这个问题的原因。

Answer 2

不幸的是我的validates_telephone_number_of验证器中存在错误。它修改了属性： - /

说

> a = 'aaa' # => 'aaa'
> b = a.to_s # => 'aaa'
> b << 'c' # => 'aaac'
> b  # => 'aaac'
> a  # => 'aaac'

需要使用b = a.to_s.dup。

奇怪的ActiveRecord模型行为

2 个答案: