Question

我有2个模型设置如下：

class Campaign < ApplicationRecord
  has_many :cities
  belongs_to :user
end

class City < ApplicationRecord
  belongs_to :campaign
end

控制器：

  def new
    @campaign = current_user.campaigns.build
    @cities = @campaign.cities
  end

我希望用户能够直接从广告系列页面创建和修改城市。我不知道该怎么做，这是我的尝试。我如何访问city.name？：name是@campaign

的参数键

<%= form_for @campaign do |f| %>
  <%= f.label "Name" %>
  <br />
  <%= f.text_field :name %>
  <br /> <br />

  <%= f.label "Titles" %>
  <br />
  <%= f.text_area :titles, cols: 80, rows: 20 %>
  <br /> <br />

  <%= f.label "Sentences" %>
  <br />
  <%= f.text_area :sentences, cols: 80, rows: 20 %>
  <br /> <br />

  <%= f.label "Keywords" %>
  <br />
  <%= f.text_area :keywords, cols: 80, rows: 20 %>
  <br /> <br />

  <% if @cities.count > 0 %>
    <h2>Cities</h2>
    <% for city in @cities %>
      <%= f.label "City name:" %>
      <br />
      <%= f.text_area :name, cols: 80, rows: 20 %>
    <% end %>
  <% end %>

  <%= f.submit "Submit" %>
<% end %>

Answer 1

我能够这样做：

   <% if @cities.count > 0 %>
    <h2>Cities</h2>
    <% for city in @cities %>
      <%= form_for city do |f| %>
        <%= f.text_area :name, cols: 20, rows: 1 %>
        <%= f.text_area :phone_number, cols: 20, rows: 1 %>
        <%= f.text_area :zip_code, cols: 20, rows: 1 %><%= f.submit "Submit" %>
      <% end %>
    <% end %>
  <% end %>

Rails如何从关联模型新页面添加记录

1 个答案: