我真的很努力让这个工作。
我正在查询Flickr API，它返回了一组数组和哈希值，我可以循环将数据添加到我的应用程序中。
我已经开始编写一些代码来迭代API结果来创建集合。它仍然失败，并想知道你们中的任何人是否能够看到我是否正确地采取了这种方式或发现我做错了什么：
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结果是：
{"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"}
我真的可以帮忙解决这个问题。我认为这是数组和散列的多维方面，以及如何创建可以循环它以添加集合的东西。我现在需要忽略这些套装。稍后将添加集。
更新：
一直在玩这个试图慢慢弄清楚哈希的每个部分是哪个并具有以下内容：
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
当我运行时，d.class正在返回：
String＆lt;对象
数组＆lt;对象
我可以访问数组部分，因此我可以继续迭代，因为我得到的是我无法执行。每个字符串（这是有意义的）。
有什么想法吗？
答案 0 :(得分：3)
是的，那令人困惑。你需要知道的是
tree["collections"]["collection"] id，title，description等。）collection的键（不 collections），其值为子集合数组现在，根据这些指导原则，我们可以编写代码来遍历树。我们递归地调用traverse_collection来处理子集合。
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
答案 1 :(得分：0)
jonahb在将Flickr API响应的组件分解为上述可管理的部分方面做得非常出色。这是使用each代替for的代码稍微更多的Rubyesque重构，它与rctneil的命名约定相匹配。
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
我在使用深度嵌套的API响应时发现非常有用的一个工具是Pry。当我使用我不熟悉的新API时，我会在API调用后立即删除binding.pry并在控制台中开始削减它。它确实有助于掌握如何尽早访问所需内容，以便在您坐下来编写代码时不会让您陷入困境。