Question

我有一个城市模型

class City < ActiveRecord::Base
  belongs_to :country
end

我还使用标准的Devise gem进行用户注册和登录。现在，我希望每个用户在编辑帐户时都拥有多个国家/地区。我将额外参数（city_ids）作为数组添加到Devise User model

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception

  before_action :configure_permitted_parameters, if: :devise_controller?

  protected


  def configure_permitted_parameters
      devise_parameter_sanitizer.permit(:sign_up,        keys: [:first_name, :last_name, :email, :password, :password_confirmation])
      devise_parameter_sanitizer.permit(:account_update, keys: [:first_name, :last_name, :email, :password, :password_confirmation, :current_password,
city_ids: []])
  end
end

我还改变了我的模板以使用它

<div class="field">
    <%= f.label :city_ids %><br />
    <%= f.select :city_ids, City.all.collect {|x| [x.name, x.id]}, {}, :multiple => true %>
  </div>

但它并没有将值写入数组。

Answer 1

只需向用户模型添加has_many :countries，然后将适当的外键添加到数据库中。看看Ruby on Rails Guide，您将找到所需的所有信息

模型

class User < ActiveRecord::Base
   has_many :countries

   devise :database_authenticatable, :registerable,
          :recoverable, :rememberable, :trackable, :validatable

   attr_accessible :email, :password, :password_confirmation
end

class Country < ActiveRecord::Base
  belongs_to :user
  has_many :cities
end

class City < ActiveRecord::Base
  belongs_to :country
end

如何使用Devise和Rails进行多项选择？

1 个答案: