使用已获得的属性进行第二次 api 调用 - Facebook Api

Question

我不确定如何使用 facebook 处理我的 api 调用的下一部分。目前我正在使用用户 ID 检索所有帖子

"https://graph.facebook.com/#{VANDALS_ID}/posts/?access_token=#{FB_ACCESS_TOKEN}"

但我也想通过使用从第一个 api 调用返回的 object_id 来获取与每个帖子关联的图片

"https://graph.facebook.com/#{object_id}/picture

所以目前我有一个类来处理第一个 api 调用，然后将返回的数据保存到我的模型中

class FacebookFeed
#Constants
VANDALS_ID = ENV['VANDALS_FB_ID']
FB_ACCESS_TOKEN = ENV['FACEBOOK_ACCESS_TOKEN']
FACEBOOK_URL = "https://graph.facebook.com/#{VANDALS_ID}/posts/?access_token=#{FB_ACCESS_TOKEN}"

def get_feed
  uri = URI(FACEBOOK_URL)
  response = HTTParty.get(uri)
  results = JSON.parse(response.body)
  puts formatted_data(results)
end

def formatted_data(results)

 return unless results

    results['data'].map { |m| 
    attrs = { message: m['message'], 
              picture: m['picture'], 
              link: m['link'], 
              object_id: m['object_id']
      }.compact 


     Post.where(attrs).first_or_create! do |post|
        post.attributes = attrs
     end
   }
   end

  def get_large_photo(object_id)
  #added this to handle the second api request and pass through the object_id

  end

所以我从第一个 api 调用中想要的所有信息都在一个名为 attrs 的哈希中，然后我可以通过 attrs['object_id'] 访问 object_id 吗？那是正确的是吗？ .

我坚持如何从哈希中获取每个 object_id 并在单独的调用中获取与其关联的图片，然后保存分配给键的值 :picture 并将其放回我的 attrs 哈希中，以便我可以将所有内容保存在我的帖子模型中

我希望这是有道理的

任何帮助表示赞赏

Answer 1

我会做这样的事情，尽管我仍然对你想要实现的目标感到困惑：

def formatted_data(results)
    if results[:data]
        for record in results[:data] do
             attrs = {
                 message: record[:message],
                 picture: record[:picture],
                 link: record[:link],
                 object_id: record[:object_id]
             }
             Post.where(attrs).first_or_create!(attrs)

             #perform second call
             if record[:object_id]
                post = Post.find_by object_id: record[:object_id] 
                if post
                    fb_large_picture_url = get_large_photo(record[:object_id])
                    post.update_attribute(large_image_url: fb_large_picture_url)
                end
             end
        end
    end
 end

 def get_large_photo(object_id)
     uri = URI("https://graph.facebook.com/#{object_id}/picture")
     response = HTTParty.get(uri)
     results = JSON.parse(response.body)
     return formatted_picture_data(results) #new method to handle response from second api call
 end

在 Skype 上与 Rich 讨论后，似乎真正的问题是他试图修改数据库以使用 object_id 记录以再次调用 API，发布更大的图像

这效率很低，但仍然可以工作

Answer 2

有一个很棒的与 FB API 交互的宝石 - koala。它在 github 上有非常好的 Wiki 页面。

有了这个 gem，很容易获得你需要的所有信息。 您可以使用graph.get_connections 或graph.get_object 来获得您想要的。

这是一个例子：

gem 'koala', "~> 1.8.0rc1"
require 'koala'
require 'pp'

user_access_token = 'access_token_here'
graph = Koala::Facebook::API.new(user_access_token) 

pp books_raw = graph.get_connections('me', 'books') 
# pp likes_raw = graph.get_connection('me', 'likes')

books_ids_array, books_names_array = [], [] 

books_raw.each_with_index {|element, i|
  puts "id: #{books_raw[i]['id']} \n\t name: #{books_raw[i]['name']}"
  books_ids_array << books_raw[i]['id'] 
  books_names_array << books_raw[i]['name']
}

books_ids_array.each {|node|
  pp book_page = graph.get_object(node)
}
puts 

Answer 3

非常感谢 Rich Peck 的帮助，在聊天（几个小时 :-)）并了解了所有关于 Rails.logger.info()、return 和许多其他事情之后，我们有一个可行的解决方案，尽管不是最有效，但很有效。

这就是类现在的样子，如果有人有任何重构技巧，那么将不胜感激

require 'httparty'
require 'open-uri'
require 'json'

class FacebookFeed
#Constants
VANDALS_ID = ENV['VANDALS_FB_ID']
FB_ACCESS_TOKEN = ENV['FACEBOOK_ACCESS_TOKEN']
FACEBOOK_URL = "https://graph.facebook.com/#{VANDALS_ID}/posts/?access_token=#{FB_ACCESS_TOKEN}"

def get_feed
  uri = URI(FACEBOOK_URL)
  response = HTTParty.get(uri)
  results = JSON.parse(response.body)
  return formatted_data(results)  
end

def formatted_data(results)
  if results['data']
    for record in results['data'] do
         attrs = {
             message: record['message'],
             picture: record['picture'],
             link: record['link'],
             object_id: record['object_id']
         }

         Post.where(attrs).first_or_create! do |post|
          post.attributes = attrs
         end

         #perform second call
         if record['object_id']
            post = Post.find_by object_id: record['object_id']
            if post
                fb_large_picture_url = get_large_photo(record['object_id'])
                post.update_column(:large_image_url, fb_large_picture_url)
            end
         end
      end
   end
end

 def get_large_photo(object_id)
   second_uri = URI("https://graph.facebook.com/#{object_id}/?picture")
   second_response = HTTParty.get(second_uri)
   second_results = JSON.parse(second_response)
   return formatted_picture_data(second_results)
 end

 def formatted_picture_data(second_results)
   return second_results['source']
 end

end