電話番号を確認できません

Question

私は成功していない電話番号を検証しようとしています。次のモデルのフォームを送信すると、有効かどうかにかかわらず、入力した電話番号が常に受け入れられます。なぜこうなった？

class Client < ActiveRecord::Base 
    belongs_to :salon 
    belongs_to :address 
    accepts_nested_attributes_for :address 
    attr_accessible :address_attributes, :name, :phone, :email 
    validates_presence_of :name 
    validates_presence_of :email 
    validates_presence_of :phone, 
    :unless => Proc.new { |c| c.phone.gsub(/[^0-9]/, "").length != 10 } 
end 

-

<%= form_for(@client) do |f| %> 
    <% if @client.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(@client.errors.count, "error") %> prohibited this client from being saved:</h2> 

     <ul> 
     <% @client.errors.full_messages.each do |msg| %> 
     <li><%= msg %></li> 
     <% end %> 
     </ul> 
    </div> 
    <% end %> 

    <%= f.hidden_field :salon_id, :value => Salon.logged_in_salon.id %> 
    <div class="field"> 
    <%= f.label :name %><br /> 
    <%= f.text_field :name %> 
    </div> 
    <div class="field"> 
    <%= f.label :phone %><br /> 
    <%= f.text_field :phone %> 
    </div> 
    <div class="field"> 
    <%= f.label :email %><br /> 
    <%= f.text_field :email %> 
    </div> 

    <%= f.fields_for :address do |address_form| %> 
    <div class="field"> 
     <%= address_form.label :line1 %><br /> 
     <%= address_form.text_field :line1 %> 
    </div> 
    <div class="field"> 
     <%= address_form.label :line2 %><br /> 
     <%= address_form.text_field :line2 %> 
    </div> 
    <div class="field"> 
     <%= address_form.label :city %><br /> 
     <%= address_form.text_field :city %> 
    </div> 
    <div class="field"> 
     <%= address_form.label :state_id %><br /> 
     <%= select("client[address]", "state_id", State.all.collect {|s| [ s.name, s.id ] }) %> 
    </div> 
    <div class="field"> 
     <%= address_form.label :zip %><br /> 
     <%= address_form.text_field :zip %> 
    </div> 
    <% end %> 

    <div class="actions"> 
    <%= f.submit %> 
    </div> 
<% end %> 

Answer 1

代わりvalidates_presence_ofのvalidates_format_ofを使用する必要があります。次のようなもの：

validates_format_of :phone, 
        :with => /\A[0-9]{10}\Z/, 
        :allow_blank => true, 
        :allow_nil => true