Field value of integer doesn't get submitted (Simple form)

Question

In my application a user has to fill in their house number. This is done through the simple_form gem but everytime I click submit it says house number can't be blank. This means the field value doesn't get submitted. How come?

Schema.rb

t.integer "house_number"

Simpleform

<%= f.input :house_number %>

Model

validates :house_number, presence: true, numericality: :integer, allow_blank: false

EDIT

I removed allow_blank because it might seem redundant. It still doesn't work though. The request log is posted below.

Started POST "/postcodes" for 127.0.0.1 at 2014-02-04 16:28:14 +0100
Processing by PostcodesController#create as HTML
  Parameters: 
{"utf8"=>"✓", 
"authenticity_token"=>"0POd0L1b81uY1nSgW6b5NHLdG5KRkA0bUB4p7wwJhxk=", 
"postcode"=>  {"zipcode"=>"1234aa", "house_number"=>"2", "street_name"=>"", "city"=>""},   "commit"=>"Submit"}
Unpermitted parameters: house_number
   (0.4ms)  BEGIN
   (0.3ms)  ROLLBACK
  Rendered postcodes/_form.html.erb (18.0ms)
  Rendered postcodes/new.html.erb within layouts/application (18.7ms)
Completed 200 OK in 35ms (Views: 28.1ms | ActiveRecord: 0.7ms)

Answer 1

只需使用此：

validates :house_number, presence: true, numericality: :integer

Answer 2

查看日志，我发现我忘记了为强参数添加的house_number！