设计如何向创建用户表单添加附加字段? [英] Devise how to add a addtional field to the create User form?

问题描述

我正在尝试在创建时向我的用户添加用户名.

I am trying to add a username to my User on create.

在设计/注册/新我有:

In devise/registrations/new I have:

<h2>Sign up</h2>

<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
  <%= devise_error_messages! %>
  <p><%= f.label :username %><br />
  <%= f.text_field :username %></p>

  <p><%= f.label :email %><br />
  <%= f.email_field :email %></p>

  <p><%= f.label :password %><br />
  <%= f.password_field :password %></p>

  <p><%= f.label :password_confirmation %><br />
  <%= f.password_field :password_confirmation %></p>

  <p><%= f.submit "Sign up" %></p>
<% end %>

<%= render :partial => "devise/shared/links" %>

问题是没有 params[:username] 发送到控制器，我在视图中收到以下错误:

The problem is there is no params[:username] sent to the controller and I get the following error in the view:

ActiveRecord::StatementInvalid in Devise::RegistrationsController#create

Mysql::Error: Column 'username' cannot be null:
  INSERT INTO `users` (`email`, `encrypted_password`, `reset_password_token`,
  `reset_password_sent_at`, `remember_created_at`, `sign_in_count`,
  `current_sign_in_at`, `last_sign_in_at`, `current_sign_in_ip`, `last_sign_in_ip`,
  `created_at`, `updated_at`, `username`) VALUES ('[e-mail]',
  '$2a$10$bWjAXLY8QGXrXeVrGciv2O6mjRF940lajBEsUOPPtPDhKyj0A/gia', NULL, NULL,
  NULL, 0, NULL, NULL, NULL, NULL, '2011-05-15 16:16:36', '2011-05-15 16:16:36',
  NULL)

Rails.root: C:/Rails/densjove
Application Trace | Framework Trace | Full Trace

Request

Parameters:

{"utf8"=>"✓",
 "authenticity_token"=>"qkQ8L0ZonXYxWQ2f4cfdREZ222oa2zGUb/qll3TRxjQ=",
 "user"=>{"username"=>"hansen",
 "email"=>"[e-mail]",
 "password"=>"[FILTERED]",
 "password_confirmation"=>"[FILTERED]"},
 "commit"=>"Sign up"}

我已将 username 列添加到我的模型中，但如何访问控制器中的 params[:username]?

I have added the username coloumn to my model, but how can I access the params[:username] in my controller?

推荐答案

Rails 4 将 param sanitizing 移至控制器.

Rails 4 moved the param sanitizing to the controller.

为设计添加自定义字段的一种方法是在应用程序控制器中添加一个 before 过滤器，调用一个方法来定义哪些是您允许的参数.

One way to add custom fields for devise is to add a before filter in the Application Controller calling a method to define which are your permitted parameters.

在代码中来自 https://github.com/plataformatec/devise#strong-parameters

class ApplicationController < ActionController::Base
  before_filter :configure_permitted_parameters, if: :devise_controller?

  protected

  def configure_permitted_parameters
    devise_parameter_sanitizer.for(:sign_up) << :username
  end
end

上面的代码是如果您要添加一个名为 username 的字段.如果您要添加 first_name，它将是:

The above code is if you are adding a field named username. If you were adding first_name it would be:

devise_parameter_sanitizer.for(:sign_up) << :first_name

这是一种方式，我强烈考虑通读以上链接中的文档，以了解有关自定义设计以允许某些字段的更多信息.

This is one way and I strongly consider reading over the docs at the link above in order to learn more about customizing devise to permit certain fields.

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