Question

我正在尝试创建一个从API检索数据的rake任务。但是，我需要的数据包含来自不同模型的数据。

这是我的错误：

[
  {
    "id": 3,
    "name": "Precision Agriculture",
    "topics_owners_ids": "#<User::ActiveRecord_Associations_CollectionProxy:0x000000095fa498>",
    "keywords_list": null,
    "keywords": [

    ],
    "organizations_list": null,
    "organizations": [

    ],
    "social_groups_list": null,
    "feeds_list": null,
    "articles_list": null,
    "people": null
  }

这是我的佣金任务：

namespace :fieldfacts do
  desc "Export Topics"
  task :export_topics => :environment do
    out = []
    File.open("public/topics.json","w") do |f|
      Topic.all.each do |topic|
          api = TopicsService.new()
          topic_api = api.get(topic.topic_api_id)
          out << {
             'id' => topic.id,
             'name' => topic.name,
             'topics_owners_ids' => topic.users.id,
             'keywords_list' => topic_api.keywords_list,
             'keywords' => topic_api.keywords,
             'organizations_list' => topic_api.organizations_list,
             'organizations' => topic_api.organizations,
             'social_groups_list' => topic_api.social_groups_list,
             'feeds_list' => topic_api.feeds_list,
             'articles_list' => topic_api.articles_list,
             'people' => topic_api.people
          }
      end
      f.write(JSON.pretty_generate(out))
    end
  end
end

如您所见，topics_owners_ids未返回正确的数据。我不知道如何获取它。

Answer 1

topic.users将为您提供集合对象，您需要选择ID。尝试 topic.users.pluck(:id)

使用多态模型

1 个答案: