2013-12-19 53 views
4

我真的很努力使這個工作。通過Flickr的API結果循環播放

我在查詢Flickr API,它返回了一組數組和哈希值,我可以通過循環將數據添加到我的應用程序中。

我已經開始編寫一些代碼來遍歷API結果來創建集合。它不斷,雖然失敗,想知道如果任何你們的可能還是看,如果我要對這個正確的方式發現什麼,我做錯了:

def self.add_collection(collection) 
    puts "Adding collection..." 
    Collection.create!({ 
     :flickr_id => collection['id'], 
     :title  => collection['title'], 
     :description => collection['description'] 
     }) 
    puts "Added collection." 
    end 


    def self.add_all 
    tree = Flickr.collections_list 
    pp tree 
    puts "Got response from Flickr" 
    tree.each do |c| 
     c[1].each do |c| 
     add_collection(c) 
     if c["collection"] 
      add_collection(c['collection'][0]) 
     end 
     end 
    end 
    end 

我的API的結果是:

{"collections"=> 
    {"collection"=> 
    [{"id"=>"57928212-7215447632914033423", 
     "title"=>"site.co.uk", 
     "description"=>"", 
     "iconlarge"=>"/images/collection_default_l.gif", 
     "iconsmall"=>"/images/collection_default_s.gif", 
     "collection"=> 
     [{"id"=>"57928212-721457634949706778", 
     "title"=>"Holidays", 
     "description"=>"", 
     "iconlarge"=>"/images/collection_default_l.gif", 
     "iconsmall"=>"/images/collection_default_s.gif", 
     "collection"=> 
      [{"id"=>"57928212-724157634943457291", 
      "title"=>"Standard", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576289846181735", 
       "title"=>"Di-ip", 
       "description"=>"11th-13th May 2008 - (-W)"}, 
       {"id"=>"7215-90497324306", 
       "title"=>"O-ay", 
       "description"=> 
       "August 2005 - (P- T)"}, 
       {"id"=>"721576290947297760", 
       "title"=>"Iceland Holiday", 
       "description"=> 
       "5- 2004 - (N-)"}]}, 
      {"id"=>"57928212-742157629691182748", 
      "title"=>"1 - W-09", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576296835355462", 
       "title"=>"D-er", 
       "description"=>""}, 
       {"id"=>"721576294683541696", 
       "title"=>"D-rea", 
       "description"=>""}, 
       {"id"=>"721576296843554852", 
       "title"=>"D-gdom", 
       "description"=>""}, 
       {"id"=>"721576297104465912", 
       "title"=>"Day 4 - Gilr-walk", 
       "description"=>""}, 
       {"id"=>"721576294710474644", 
       "title"=> 
       "Day 5 - Calif-uth", 
       "description"=>""}, 
       {"id"=>"721576249710489442", 
       "title"=>"Day 6 - Si-untain", 
       "description"=>""}, 
       {"id"=>"721576429834618028", 
       "title"=> 
       "Day 7 - Unive-za", 
       "description"=>""}, 
       {"id"=>"721576249834637138", 
       "title"=>"Day 8 - Se-Park", 
       "description"=>""}, 
       {"id"=>"721576249836419418", 
       "title"=>"Day 9 - Lego-Park", 
       "description"=>""}, 
       {"id"=>"721576249851123596", 
       "title"=>"Day 10 - Kn-re City", 
       "description"=>""}, 
       {"id"=>"721576298541700916", 
       "title"=>"Day 11 & 12 - Disn-sort", 
       "description"=>""}, 
       {"id"=>"721576249851713058", 
       "title"=>"Day 13,14 & 15 - La-as", 
       "description"=>""}]}, 
      {"id"=>"57928212-721547629866347760", 
      "title"=>"2 - Mi-10", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576294866337538", 
       "title"=>"Day 0 - Arr-rica", 
       "description"=>""}, 
       {"id"=>"721576298468655454", 
       "title"=>"Day 1 - M-a", 
       "description"=>""}, 
       {"id"=>"721576299707347598", 
       "title"=>"Day 2 - Adven-n", 
       "description"=>""}, 
       {"id"=>"721576430011649024", 
       "title"=>"Day 3 - W-un", 
       "description"=>""}, 
       {"id"=>"721576304034790528", 
       "title"=>"Day 4 - Sil-", 
       "description"=>""}, 
       {"id"=>"721576300354520246", 
       "title"=>"Day 5 - St-eum", 
       "description"=>""}, 
       {"id"=>"721576300443090072", 
       "title"=>"Day 6 - Si-uis", 
       "description"=>""}, 
       {"id"=>"721576300443098290", 
       "title"=>"Day 7 - Ho-rld", 
       "description"=>""}, 
       {"id"=>"721576300448416804", 
       "title"=>"Day 8 - Indi-ach", 
       "description"=>""}, 
       {"id"=>"721576300448431390", 
       "title"=>"Day 9 - -ca", 
       "description"=>""}, 
       {"id"=>"721457629997482351", 
       "title"=> 
       "Day 10 - Mount O-eads", 
       "description"=>""}, 
       {"id"=>"721576304059600702", 
       "title"=>"Day 11 - Vall-", 
       "description"=>""}]}, 
      {"id"=>"57928212-721457630658165668", 
      "title"=>"3 - Intim-010", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576341693409808", 
       "title"=> 
       "Day 1 - Gre-n City", 
       "description"=>""}, 
       {"id"=>"721576306547898798", 
       "title"=>"Day 1 - C-s", 
       "description"=>""}, 
       {"id"=>"721576306924436584", 
       "title"=>"Day 2 - -d", 
       "description"=>""}, 
       {"id"=>"721547630699845912", 
       "title"=>"Day 3 - Ran-vities", 
       "description"=>""}, 
       {"id"=>"721576304714758818", 
       "title"=>"Day 4 - Lo-urg", 
       "description"=>""}, 
       {"id"=>"721576304717785454", 
       "title"=>"Day 5 - Bu-urg", 
       "description"=>""}, 
       {"id"=>"721576304717785576", 
       "title"=>"Day 6 - Kin-ion", 
       "description"=>""}]}, 
      {"id"=>"57928212-742157631693570817", 
      "title"=>"4 - Bes-12", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576316493011733", 
       "title"=> 
       "Day 0 - Early -orld Park", 
       "description"=>""}, 
       {"id"=>"721576316934409808", 
       "title"=> 
       "Day 1 - Grea-ity", 
       "description"=>""}, 
       {"id"=>"721576431698474564", 
       "title"=>"Day 2 - Shijin-rk", 
       "description"=>""}, 
       {"id"=>"721576341703216195", 
       "title"=> 
       "Day 3 - Happ-rk", 
       "description"=>""}, 
       {"id"=>"721574631713251068", 
       "title"=>"Day 4 - Victo-g", 
       "description"=>""}, 
       {"id"=>"721576314761492087", 
       "title"=>"Day 5 - Floral-ark", 
       "description"=>""}, 
       {"id"=>"721576318148565932", 
       "title"=>"Day 6 - H-du", 
       "description"=>""}, 
       {"id"=>"721576318148581382", 
       "title"=>"Day -ry", 
       "description"=>""}, 
       {"id"=>"721576318419272104", 
       "title"=> 
       "Day 8 - Ha-Park", 
       "description"=>""}, 
       {"id"=>"721576314820243661", 
       "title"=> 
       "Day 9 - Sha-ruise", 
       "description"=>""}, 
       {"id"=>"721574631872193783", 
       "title"=> 
       "Day 10 - Fisherma-ervatory", 
       "description"=>""}, 
       {"id"=>"721574631874073880", 
       "title"=> 
       "Day 11- Gongqin-ark", 
       "description"=>""}, 
       {"id"=>"721576318474794697", 
       "title"=>"Day 12 - Hap-ark", 
       "description"=>""}, 
       {"id"=>"721576318940558319", 
       "title"=>"Day 13 - -", 
       "description"=>""}, 
       {"id"=>"721576319544111677", 
       "title"=> 
       "Day 14 - G-World", 
       "description"=>""}, 
       {"id"=>"721576319624210803", 
       "title"=> 
       "Day 15 - Chi-or", 
       "description"=>""}, 
       {"id"=>"721576319628749339", 
       "title"=> 
       "Day 16 - Kn-rld", 
       "description"=>""}, 
       {"id"=>"721576319751048564", 
       "title"=>"Day 17 - Ha-hen", 
       "description"=>""}, 
       {"id"=>"721576319749243775", 
       "title"=>"Day 18 - O-eing", 
       "description"=>""}, 
       {"id"=>"721576319765947399", 
       "title"=>"Day 19 - Dis-ong", 
       "description"=>""}]}, 
      {"id"=>"57928212-721576434943433385", 
      "title"=>"5 - T-13", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576349908483894", 
       "title"=>"Day 1 - Tai-ng", 
       "description"=>""}, 
       {"id"=>"721576349954099233", 
       "title"=>"Day 2 - -", 
       "description"=>""}, 
       {"id"=>"721576350042484738", 
       "title"=>"Day 3 - J-orld", 
       "description"=>""}, 
       {"id"=>"721576350594662914", 
       "title"=> 
       "Day 4 - For-t", 
       "description"=>""}, 
       {"id"=>"721576350545445863", 
       "title"=>"Day 5-dise", 
       "description"=>""}, 
       {"id"=>"721576352944144798", 
       "title"=> 
       "Day 6 - L-na", 
       "description"=>""}]}, 
      {"id"=>"57928212-721576435094962919", 
      "title"=>"6 - Japan 2013", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576350944001201", 
       "title"=>"Day 1 - Fli-dium", 
       "description"=>""}, 
       {"id"=>"721576350494923653", 
       "title"=>"Day 2 - Tok-a", 
       "description"=>""}, 
       {"id"=>"721576350497502859", 
       "title"=>"Day 3 - Tobu Zoo", 
       "description"=>""}, 
       {"id"=>"721576351430344700", 
       "title"=>"Day 4 - Uni-an", 
       "description"=>""}, 
       {"id"=>"721457635131070810", 
       "title"=>"Day 5 - Hira-mple", 
       "description"=>""}, 
       {"id"=>"721576351444725534", 
       "title"=>"Day 6 - Yo-adise", 
       "description"=>""}, 
       {"id"=>"721576351454178145", 
       "title"=>"Day 7 - Nag-nd", 
       "description"=>""}, 
       {"id"=>"721547635164257344", 
       "title"=>"Day 8 - Hok-oro", 
       "description"=>""}, 
       {"id"=>"721576354182539619", 
       "title"=>"Day 9 - Ru-ort", 
       "description"=>""}, 
       {"id"=>"721576351472948421", 
       "title"=>"Day 10 - Jo-ea", 
       "description"=>""}, 
       {"id"=>"721576351894974362", 
       "title"=>"Day 11 - -d", 
       "description"=>""}, 
       {"id"=>"721576352035465038", 
       "title"=>"Day 12- Tok-kitori", 
       "description"=>""}, 
       {"id"=>"721576352574508275", 
       "title"=>"Day 13- To-a", 
       "description"=>""}, 
       {"id"=>"721576352746739360", 
       "title"=>"Day 14 - Tok-ea", 
       "description"=>""}, 
       {"id"=>"721576354268544001", 
       "title"=>"Day 15 - --ea", 
       "description"=>""}]}]}, 
     {"id"=>"57928212-721574628668300643", 
     "title"=>"Days out", 
     "description"=>"", 
     "iconlarge"=>"/images/collection_default_l.gif", 
     "iconsmall"=>"/images/collection_default_s.gif", 
     "collection"=> 
      [{"id"=>"57928212-721457628668352769", 
      "title"=>"One off's", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576308409580828", 
       "title"=>"ChThisip", 
       "description"=>"Sun 29th July 2012 (Neil T, Mandy T)"}, 
       {"id"=>"721576306394290306", 
       "title"=>"Blackpool - 8th Jul 2012", 
       "description"=> 
       "(Neil T, MThisS, Ben K)"}, 
       {"id"=>"721576299940667113", 
       "title"=> 
       "Legoland Thisne 2010", 
       "description"=>"This)"}, 
       {"id"=>"721576294405676947", 
       "title"=>"SkThisl 1)", 
       "description"=>""}, 
       {"id"=>"721576294391564267", 
       "title"=>"Canal Boating", 
       "description"=> 
       "SunThismas)"}, 
       {"id"=>"721576294391564197", 
       "title"=>"SThisert", 
       "description"=> 
       "12th Jul 2003 - (PeThisrk T)"}, 
       {"id"=>"721576294391560887", 
       "title"=>"BThises", 
       "description"=> 
       " 29thThiss A)"}, 
       {"id"=>"721576290848461747", 
       "title"=>"Go Karting 2012", 
       "description"=>" 28th Jan 2012 for Neil's birthday"}, 
       {"id"=>"721576349284451987", 
       "title"=> 
       "SThis A)", 
       "description"=>""}]}, 
      {"id"=>"57928212-721574628668280287", 
      "title"=>"Theme Parks", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "collection"=> 
      [{"id"=>"57928212-721457634949768308", 
       "title"=>"TThisrk", 
       "description"=>"", 
       "iconlarge"=>"/images/collection_default_l.gif", 
       "iconsmall"=>"/images/collection_default_s.gif", 
       "set"=> 
       [{"id"=>"721576334256718298", 
        "title"=> 
        "TThisP)", 
        "description"=>""}]}, 
       {"id"=>"57928212-721576429626109372", 
       "title"=>"PlThisl", 
       "description"=>"", 
       "iconlarge"=>"/images/collection_default_l.gif", 
       "iconsmall"=>"/images/collection_default_s.gif", 
       "set"=> 
       [{"id"=>"7215762945459430821", 
        "title"=>"PThis11", 
        "description"=>"(Neil T, Rick M, Jackie DM)"}]}, 
       {"id"=>"57928212-721576249991000745", 
       "title"=>"GuThisld", 
       "description"=>"", 
       "iconlarge"=>"/images/collection_default_l.gif", 
       "iconsmall"=>"/images/collection_default_s.gif", 
       "set"=> 
       [{"id"=>"721576296244407020", 
        "title"=>"GThis011", 
        "description"=> 
        "(NeiThiseorge)"}]}, 
       {"id"=>"57928212-721576294990999301", 
       "title"=>"FThisd", 
       "description"=>"", 
       "iconlarge"=>"/images/collection_default_l.gif", 
       "iconsmall"=>"/images/collection_default_s.gif", 
       "set"=> 
       [{"id"=>"721576294625410346", 
        "title"=>"FlThis0", 
        "description"=>"(NThis)"}]}, 
       {"id"=>"57928212-721457628668340547", 
       "title"=>"DrThisor", 
       "description"=>"", 
       "iconlarge"=>"/images/collection_default_l.gif", 
       "iconsmall"=>"/images/collection_default_s.gif", 
       "set"=> 
       [{"id"=>"721576294638932742", 
        "title"=>"DraThis010", 
        "description"=>"(NThisW)"}]}, 
       {"id"=>"57928212-721547628668287225", 
       "title"=>"AltThisrs", 
       "description"=>"", 
       "iconlarge"=> 
       "http://farm8.staticflickr.com/7024/cols/72157628668287225_190361d603_l.jpg", 
       "iconsmall"=> 
       "http://farm8.staticflickr.com/7024/cols/72157628668287225_190361d603_s.jpg", 
       "set"=> 
       [{"id"=>"721576328264334688", 
        "title"=> 
        "FebThis P)", 
        "description"=>""}, 
       {"id"=>"721576306265468434", 
        "title"=>"Alt-ers - 15th Jul 2012", 
        "description"=>"(N-g A)"}, 
       {"id"=>"721576303726416660", 
        "title"=>"A-n 2012", 
        "description"=> 
        "(NThis K)"}, 
       {"id"=>"721576294666253333", 
        "title"=>"AThis2010", 
        "description"=>"(Thisl H)"}, 
       {"id"=>"721576294990697063", 
        "title"=>"AThis10", 
        "description"=>"(This)"}, 
       {"id"=>"721576299940655063", 
        "title"=> 
        "This008", 
        "description"=>"(NThis)"}, 
       {"id"=>"721576429990712153", 
        "title"=> 
        "Event 2011 - 31st Oct-1st Nov 2011", 
        "description"=>"(This)"}, 
       {"id"=>"721576295594429835", 
        "title"=>"This 29th-31st Oct 2009", 
        "description"=>"(ThisF)"}, 
       {"id"=>"721576291947499268", 
        "title"=> 
        "Behi-l 2006", 
        "description"=>"(This)"}, 
       {"id"=>"721576295411694365", 
        "title"=>"Day 2010 - 21st Jun 2010", 
        "description"=>"This)"}]}]}]}, 
     {"id"=>"57928212-721457628985775057", 
     "title"=>"Yearly Events", 
     "description"=>"", 
     "iconlarge"=>"/images/collection_default_l.gif", 
     "iconsmall"=>"/images/collection_default_s.gif", 
     "collection"=> 
      [{"id"=>"57928212-721576429836230144", 
      "title"=>"This", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"721576299818309211", 
       "title"=>"Here StThisees", 
       "description"=>""}, 
       {"id"=>"721576296173454860", 
       "title"=>"Thisats", 
       "description"=>""}]}, 
      {"id"=>"57928212-721576258985777547", 
      "title"=>"Birthdays", 
      "description"=>"", 
      "iconlarge"=>"/images/collection_default_l.gif", 
      "iconsmall"=>"/images/collection_default_s.gif", 
      "set"=> 
      [{"id"=>"7215762899995365613", 
       "title"=>"This12", 
       "description"=>""}]}]}, 
     {"id"=>"57928212-721576298356236274", 
     "title"=>"Misc", 
     "description"=>"", 
     "iconlarge"=>"/images/collection_default_l.gif", 
     "iconsmall"=>"/images/collection_default_s.gif", 
     "set"=> 
      [{"id"=>"721576295511800621", 
      "title"=>"This", 
      "description"=>""}, 
      {"id"=>"721576295391565747", 
      "title"=>"This", 
      "description"=>""}]}]}]}, 
"stat"=>"ok"} 

我真的可以做一些這方面的幫助。我認爲這是數組和哈希的多維方面,以及如何創建可以循環以添加集合的東西。現在我需要忽略這些設置。套件將在稍後添加。

UPDATE:

被玩弄這種試圖慢慢找出散列的每一個部分是與具備以下條件:

def self.add_all 
    tree = Flickr.collections_list['collections'] 
    puts "Got response from Flickr" 
    tree.each do |c| 
     c.each do |d| 
     ap d.class 
     #add_collection(d) 
     end 
    end 

當我運行,d.class正在恢復:

字符串<對象

陣列<對象

我可以訪問數組部分,所以我可以繼續迭代,因爲我得到的所有信息都是我無法執行每個字符串(這是有道理的)。

任何想法?

+0

你看到了什麼錯誤?你要做的方法應該可以工作,但我猜測可能會出現這樣的情況:散列被當作數組處理,反之亦然,這會導致錯誤。因此,這確實是一項任務,可以驗證您在每個步驟中處理的對象類型,以便收集您要查找的數據。 – Puhlze

+0

由於缺少''',你的API響應有一個解析錯誤,可能是:''description「=>這個)」},'。複製/粘貼錯誤? –

+0

是的,這是一個複製粘貼錯誤。現在修復。有沒有一種方法可以減少API結果,以便我能更清楚地瞭解它的層次結構是如何設置的,這樣我就可以在邏輯上逐步完成它了? – rctneil

回答

3

是的,這是令人困惑的。你需要知道什麼是

  1. 的頂級藏品的陣列是tree["collections"]["collection"]
  2. 集合與每個屬性鍵(idtitledescription等)
  3. 集合散列可能有一個名爲collection而不是collections)的密鑰,其值是一組子集合

現在,根據這些指導原則,我們可以編寫代碼來遍歷樹。遞歸地調用traverse_collection來處理子集合。

def traverse_collection(collection) 
    Collection.create! :flickr_id => collection["id"], 
    :title => collection["title"], 
    :description => collection["description"] 

    if collection["collection"] 
    for child in collection["collection"] 
     traverse_collection child 
    end 
    end 
end 

for collection in Flickr.collections_list["collections"]["collection"] 
    traverse_collection collection 
end 
+0

非常感謝。真的很簡單,我試了一下,並調整它。非常感激。 – rctneil

0

jonahb做了一個出色的工作,將Flickr API響應的組件分解成上面的可管理塊。這裏使用each代替for,它的代碼稍微更魯氏重構,它符合rctneil的命名約定。

def self.add_collection(collection) 
    Collection.create!(flicker_id: collection['id'], 
         title: collection['title'], 
         description: collection['description']) 
    collection['collection'].each { |sub_collection| add_collection sub_collection } if collection['collection'] 
end 

def self.add_all 
    collections = Flickr.collections_list["collections"]["collection"] 
    collections.each { |collection| add_collection collection } 
end 

當我使用深度嵌套的API響應時,發現一個令人難以置信的工具是Pry。當我使用我不熟悉的新API時,我將在API調用之後立即刪除binding.pry,並開始在控制檯中刪除它。它確實有助於更好地處理如何儘早訪問您需要的內容,以便稍後在坐下時編寫代碼時不會讓您感到厭煩。

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我在Stack Overflow上看到過這樣的說法 - 「每個」比'in ... in更「Rubyesque」。我必須不同意。正如Matz在[本次訪談](http://www.artima.com/intv/closures.html)中所說的,Ruby迭代的本質是「迭代的細節應該屬於服務提供者類。」 'for ... in'和'each'都提供這種封裝,並且在我看來,'for ... in'更清晰更簡潔。 – jonahb

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我不會與此爭論,jonahb。你的代碼當然很清楚。爲了他自己,我想呢? :-)乾杯! –

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我從來不知道for ...的語法,並且實際上發現它更具可讀性,所以在我的代碼中使用了它。 – rctneil