使用Twitter Gem从用户的时间线中提取图像

Question

我希望用户能够“选择”他们之前通过Twitter上传的图像。

我正在使用Sferik的Twitter Gem，但在阅读完文档后我还没有进一步深入。

当我打电话给经过身份验证的用户的时间线时，我可以看到一些推文有一个像这样的媒体对象：

Twitter.home_timeline.first
    => #<Twitter::Tweet:0x007fe8eaaf4738 @attrs={
:created_at=>"Fri Jun 14 22:24:19 +0000 2013",
 :id=>345668046926536704,
 :id_str=>"345668046926536704",
 :text=>"Testing some more WishPanda. Check out the logo made by Becky Peng! http://t.co/rmD56WhO3r",
 :source=>"<a href=\"http://twitter.com/download/android\" rel=\"nofollow\">Twitter for Android</a>",
 :truncated=>false,
 :in_reply_to_status_id=>nil,
 :in_reply_to_status_id_str=>nil,
 :in_reply_to_user_id=>nil,
 :in_reply_to_user_id_str=>nil,
 :in_reply_to_screen_name=>nil,
 :user=>{
:id=>216810199,
 :id_str=>"216810199",
 :name=>"Doug",
 :screen_name=>"FloofyDoug",
 :location=>"Brazil",
 :description=>"It's so floofy!",
 :url=>""removed because i couldn't post more than two links",
 :entities=>{
:url=>{
:urls=>[{
:url=>""removed because i couldn't post more than two links"",
 :expanded_url=>"http://floofydoug.com",
 :display_url=>"floofydoug.com",
 :indices=>[0, 20]}]},
 :description=>{
:urls=>[]}},
 :protected=>false,
 :followers_count=>59,
 :friends_count=>77,
 :listed_count=>0,
 :created_at=>"Wed Nov 17 19:49:38 +0000 2010",
 :favourites_count=>107,
 :utc_offset=>-18000,
 :time_zone=>"Eastern Time (US & Canada)",
 :geo_enabled=>true,
 :verified=>false,
 :statuses_count=>243,
 :lang=>"en",
 :contributors_enabled=>false,
 :is_translator=>false,
 :profile_background_color=>"ACDED6",
 :profile_background_image_url=>""removed because i couldn't post more than two links"",
 :profile_background_image_url_https=>""removed because i couldn't post more than two links"",
 :profile_background_tile=>false,
 :profile_image_url=>""removed because i couldn't post more than two links"",
 :profile_image_url_https=>""removed because i couldn't post more than two links"",
 :profile_banner_url=>""removed because i couldn't post more than two links"",
 :profile_link_color=>"038543",
 :profile_sidebar_border_color=>"EEEEEE",
 :profile_sidebar_fill_color=>"F6F6F6",
 :profile_text_color=>"333333",
 :profile_use_background_image=>true,
 :default_profile=>false,
 :default_profile_image=>false,
 :following=>true,
 :follow_request_sent=>nil,
 :notifications=>nil},
 :geo=>nil,
 :coordinates=>nil,
 :place=>nil,
 :contributors=>nil,
 :retweet_count=>0,
 :favorite_count=>0,
 :entities=>{
:hashtags=>[],
 :symbols=>[],
 :urls=>[],
 :user_mentions=>[],
 :media=>[{
:id=>345668046930731009,
 :id_str=>"345668046930731009",
 :indices=>[68, 90],
 :media_url=>"http://pbs.twimg.com/media/BMwPQduCYAEsnaA.jpg",
 :media_url_https=>""removed because i couldn't post more than two links"",
 :url=>"removed because i couldn't post more than two links",
 :display_url=>""removed because i couldn't post more than two links",
 :expanded_url=>""removed because i couldn't post more than two links"",
 :type=>"photo",
 :sizes=>{
:medium=>{
:w=>600,
 :h=>338,
 :resize=>"fit"},
 :small=>{
:w=>340,
 :h=>192,
 :resize=>"fit"},
 :thumb=>{
:w=>150,
 :h=>150,
 :resize=>"crop"},
 :large=>{
:w=>1024,
 :h=>577,
 :resize=>"fit"}}}]},
 :favorited=>false,
 :retweeted=>false,
 :possibly_sensitive=>false,
 :lang=>"en"}>

如何通过Twitter gem将这些媒体网址中的几个拉出来？

Answer 1

我不知道如何使用gem当前可以做到这一点，但你可以使用.each循环过滤结果：

@twitter.each do |tweet|
    if tweet.media_url.present? 
        image_tag(tweet.media_url)
    end
end

这种方法存在问题

你每次都在遍历整个数组（效率不高）。我正在查看源代码，看看是否可以采取任何措施来过滤结果，以便不需要循环

---

更新

来自我们的某个应用的工作代码：

在帮手：

def twitter_feed
    Twitter.user_timeline(21931601).take(5) #limits array to 5 items
end

在视图中：

twitter_feed.each do |tweet|
    image_tag(tweet.media[0]["media_url"], :size => tweet.media[0]["sizes"]["thumb"]) if(tweet.media.present?)
end

更多的选择

Twitter Gem's Github page有更多选择

Answer 2

我最终做了这样的事情。 API仅返回用户的3,200条最新推文。

require"twitter"

client=Twitter::REST::Client.new{|config|
  config.consumer_key=""
  config.consumer_secret=""
  config.access_token=""
  config.access_token_secret=""
}

user="username"
max=nil

while true
  options={count:200}
  options[:max_id]=max if max
  timeline=client.user_timeline(user,options)
  break if timeline.empty?
  timeline.each{|tweet|
    tweet.media.each{|media|
      puts media.media_url.to_s
    }
  }
  max=timeline.last.id-1
end