Question

我有用户注册表。用户必须通过选择选项选择他的国家/地区。当我提交表格我得到错误国家（＃70309119520500）预期，得到字符串（＃8039220）请帮助我如何将字符串转换为整数，以便我可以在数据库中插入记录。

ruby -v: ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux]
rails -v: Rails 4.1.8

这是我的html.rb表格

<%= form_for :user, url: users_path do |f| %>
    <div class="field">
      <%= f.label :countries %>
      <% options = options_from_collection_for_select(Country.all, 'id', 'country', 1) %>
      <%=  f.select :country,  options %>
    </div>
<% end %>

这是请求

    Parameters:

{"utf8"=>"✓",
 "authenticity_token"=>"34/KncZpwhEDYRZuWe09nKmF7DG7+lEu0IBxe9YbKnE=",
 "user"=>{"firm"=>"Chillum doo",
 "name"=>"myname",
 "last_name"=>"mylastname",
 "address"=>"myAdress",
 "post_number"=>"0000",
 "city"=>"myCity",
 "country"=>"1",
 "telephone"=>"000000000",
 "mobile_phone"=>"000000000",
 "user_name"=>"myUserName",
 "email"=>"myEmail@gmail.com",
 "password"=>"[FILTERED]",
 "password_confirmation"=>"[FILTERED]"},
 "commit"=>"Create Account"}

用户控制器

class UsersController < ApplicationController


  def new
    @user = User.new
  end

  def create
    @user = User.new(user_params)
    if @user.save!
      redirect_to '/', notice: 'User registered successfully'
    else
      render 'new'
    end
  end

  private
  def user_params
    params.require(:user).permit(:firm, :name, :last_name, :address, :post_number,
                                 :city, :country, :telephone, :mobile_phone, :user_name,
                                 :email, :password, :password_confirmation)
  end

end

Answer 1

在create方法中，您应该能够快速将：country param转换为如下整数： @user = User.new(user_params.tap{ |u| u[:country] = u[:country].to_i })

Answer 2

假设您的用户模型belongs_to :country，您希望表单提交country_id，而不是country。尝试类似：

<%=  f.select :country_id,  options %>

您还需要在控制器中允许country_id作为属性。

Rails 4：f.select返回字符串而不是整数

2 个答案: