У меня есть эта задача rake, которая использует клиент rest для извлечения некоторого беспорядочного JSON из этого API, а затем использует hashie, чтобы сделать код более красивым.Не удалось получить глубоко вложенное значение хэша
К сожалению, я не могу извлечь одно из глубоко вложенных значений, productGroup
. При правильной работе он должен выводить :category => "Jeans"
или аналогичный. Посмотрите на JSON внизу.
Это не работа:
mash.deep_fetch(:fields, 0).deep_locate(-> (key, value, object) { value.include?("product_group") }) { "ERROR: category" }
Пример вывода:
% rake get_products
{:category=>nil, :name=>"Luxurous Jumpsuit", :image=>"http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/productLarge/129579-0012.jpg", :price=>"599", :description=>"Lorem ipsum dolor"}
Пример затора:
#<Hashie::Mash brand="Dr Denim" categories=[#<Hashie::Mash name="Kvinne > KLÆR > Jeans > Slim">] description="Lorem ipsum dolor." fields=[#<Hashie::Mash name="sale" value="false">, #<Hashie::Mash name="product_id_original" value="226693-7698">, #<Hashie::Mash name="gender" value="Kvinne">, #<Hashie::Mash name="artNumber" value="226693-7698">, #<Hashie::Mash name="productGroup" value="Jeans">, #<Hashie::Mash name="productStyle" value="Slim">, #<Hashie::Mash name="extraImageProductSmall" value="http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/cart_thumb/226693-7698.jpg">, #<Hashie::Mash name="productClass" value="Klær">, #<Hashie::Mash name="extraImageProductLarge" value="http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/productLarge/226693-7698.jpg">, #<Hashie::Mash name="sizes" value="W24/L32,W25/L32,W26/L32,W27/L32,W28/L32,W29/L32,W30/L32,W31/L32,W32/L32,W26/L30,W27/L30,W28/L30,W29/L30,W24/L30,W25/L30,W32/L30,W31/L30,W30/L30">, #<Hashie::Mash name="color" value="Mid Blue">] identifiers=#<Hashie::Mash sku="226693-7698"> language="no" name="Regina Jeans" offers=[#<Hashie::Mash feed_id=10086 id="2820760a-c5b2-494a-b5dd-ab713f796cb9" in_stock=1 modified=1474947357838 price_history=[#<Hashie::Mash date=1474949513421 price=#<Hashie::Mash currency="NOK" value="599">>] product_url="http://pdt.tradedoubler.com/click?a1234" program_logo="http://hst.tradedoubler.com/file/17833/2014-logos/200X200.png" program_name="Nelly NO" source_product_id="226693-7698">] product_image=#<Hashie::Mash url="http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/productLarge/226693-7698.jpg">>
get_products.rake:
# encoding: utf-8
# Gets messy JSON from other store via REST client and cleans it up with Hashie
require "rest_client"
require "hashie"
Product = Struct.new(:category, :name, :image, :price, :description)
module ProductsFromOtherStore
CATEGORIES = [
"festkjoler",
"jakker",
"jeans",
"jumpsuit",
"vesker"
]
def self.fetch
CATEGORIES.map do |category|
Tradedoubler.fetch category
end
end
# Prettify, ie. `fooBar` => `foo_bar`
def self.prettify(x)
case x
when Hash
x.map { |key, value| [key.underscore, prettify(value)] }.to_h
when Array
x.map { |value| prettify(value) }
else
x
end
end
end
class ProductsFromOtherStore::Tradedoubler
KEY = "FE34B1309AB749F1578AEE87D9D74535513F6B54"
# Products to fetch from API
LIMIT = 2
def self.fetch category
new(category).filtered_products.take(LIMIT)
rescue RestClient::RequestTimeout => e
Array.new
end
def initialize category
@category = category
# API doesn't support gender or category searches, so do some filtering based on available JSON fields
@filters = Array.new
define_filter { |mash|
mash.fields.any? { |field|
field.name == "gender" && field.value.downcase == "kvinne"
}
}
define_filter { |mash|
mash.categories.any? { |category|
category.name.underscore.include? @category
}
}
end
def define_filter(&filter)
@filters << filter
end
def filtered_products
filtered_mashes.map { |mash|
# puts mash
Product.new(
# mash.deep_fetch(:fields, 0).find { |field| field[:name] == "product_group" }[:value],
mash.deep_fetch(:fields, 0).deep_locate(-> (key, value, object) { value.include?("product_group") }) { "ERROR: category" },
mash.deep_fetch(:name) { "ERROR: name" },
mash.deep_fetch(:product_image, :url) { "ERROR: image URL" },
mash.deep_fetch(:offers, 0, :price_history, 0, :price, :value) { "ERROR: price" },
mash.deep_fetch(:description) { "ERROR: description" }
)
}
end
private
def request
response = RestClient::Request.execute(
:method => :get,
:url => "http://api.tradedoubler.com/1.0/products.json;q=#{ URI.encode(@category) };limit=#{ LIMIT }?token=#{ KEY }",
:timeout => 0.4
)
end
def hashes
ProductsFromOtherStore.prettify(JSON.parse(request)["products"])
end
def mashes
hashes.map { |hash| Hashie::Mash.new(hash) }.each do |mash|
mash.extend Hashie::Extensions::DeepFetch
mash.extend Hashie::Extensions::DeepLocate
end
end
def filtered_mashes
mashes.select { |mash| mash_matches_filter? mash }
end
def mash_matches_filter? mash
# `.all?` requires all filters to match, `.any?` requires only one
@filters.all? { |filter| filter.call mash }
end
end
# All that for this
task :get_products => :environment do
@all_products_from_all_categories = ProductsFromOtherStore.fetch
@all_products_from_all_categories.each do |products|
products.each do |product|
puts product.to_h
end
end
end
запутанных JSON мы получили с помощью покоя клиента:
{
"productHeader": {
"totalHits": 367
},
"products": [{
"name": "501 CT Jeans For Women",
"productImage": {
"url": "http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/productLarge/441576-1056.jpg"
},
"language": "no",
"description": "Jeans fra Levi's. Noe kortere nederst, fem lommer. Normal høyde på midjen, med hemper i linningen og knappegylfen. Dekorative slitte partier foran og nederst på benet.<br />Laget av 100% bomull.",
"brand": "Levis",
"identifiers": {
"sku": "441576-1056"
},
"fields": [{
"name": "sale",
"value": "false"
}, {
"name": "sizes",
"value": "W24/L32,W25/L32,W26/L32,W27/L32,W28/L32,W29/L32,W30/L32,W31/L32,W25/L34,W26/L34,W27/L34,W28/L34,W29/L34,W30/L34"
}, {
"name": "productStyle",
"value": "Straight"
}, {
"name": "gender",
"value": "Kvinne"
}, {
"name": "product_id_original",
"value": "441576-1056"
}, {
"name": "productGroup",
"value": "Jeans"
}, {
"name": "extraImageProductLarge",
"value": "http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/productLarge/441576-1056.jpg"
}, {
"name": "extraImageProductSmall",
"value": "http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/cart_thumb/441576-1056.jpg"
}, {
"name": "artNumber",
"value": "441576-1056"
}, {
"name": "productClass",
"value": "Klær"
}, {
"name": "color",
"value": "Indigo"
}],
"offers": [{
"feedId": 10086,
"productUrl": "http://pdt.tradedoubler.com/click?a(2402331)p(80279)product(57d37b9ce4b085c06c38c96b)ttid(3)url(http%3A%2F%2Fnelly.com%2Fno%2Fkl%C3%A6r-til-kvinner%2Fkl%C3%A6r%2Fjeans%2Flevis-441%2F501-ct-jeans-for-women-441576-1056%2F)",
"priceHistory": [{
"price": {
"value": "1195",
"currency": "NOK"
},
"date": 1473477532181
}],
"modified": 1473477532181,
"inStock": 1,
"sourceProductId": "441576-1056",
"programLogo": "http://hst.tradedoubler.com/file/17833/2014-logos/200X200.png",
"programName": "Nelly NO",
"id": "57d37b9ce4b085c06c38c96b"
}],
"categories": [{
"name": "Kvinne > KLÆR > Jeans > Straight"
}]
}, {
"name": "501 CT Jeans For Women",
"productImage": {
"url": "http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/productLarge/441576-6581.jpg"
},
"language": "no",
"description": "Jeans fra Levi's. Noe kortere nederst, fem lommer. Normal høyde på midjen, med hemper i linningen og knappegylfen. Dekorative slitte partier foran og nederst på benet.<br />Laget av 100% bomull.",
"brand": "Levis",
"identifiers": {
"sku": "441576-6581"
},
"fields": [{
"name": "sale",
"value": "false"
}, {
"name": "artNumber",
"value": "441576-6581"
}, {
"name": "productStyle",
"value": "Straight"
}, {
"name": "gender",
"value": "Kvinne"
}, {
"name": "extraImageProductLarge",
"value": "http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/productLarge/441576-6581.jpg"
}, {
"name": "extraImageProductSmall",
"value": "http://nlyscandinavia.scene7.com/is/image/nlyscandinavia/cart_thumb/441576-6581.jpg"
}, {
"name": "productGroup",
"value": "Jeans"
}, {
"name": "product_id_original",
"value": "441576-6581"
}, {
"name": "productClass",
"value": "Klær"
}, {
"name": "color",
"value": "Desert"
}, {
"name": "sizes",
"value": "W24/L32,W25/L32,W26/L32,W27/L32,W28/L32,W29/L32,W30/L32,W31/L32,W25/L34,W26/L34,W27/L34,W28/L34,W29/L34,W30/L34,W31/L34"
}],
"offers": [{
"feedId": 10086,
"productUrl": "http://pdt.tradedoubler.com/click?a(2402331)p(80279)product(57b3cafbe4b06cf59bc254bf)ttid(3)url(http%3A%2F%2Fnelly.com%2Fno%2Fkl%C3%A6r-til-kvinner%2Fkl%C3%A6r%2Fjeans%2Flevis-441%2F501-ct-jeans-for-women-441576-6581%2F)",
"priceHistory": [{
"price": {
"value": "1195",
"currency": "NOK"
},
"date": 1471400699283
}],
"modified": 1471400699283,
"inStock": 1,
"sourceProductId": "441576-6581",
"programLogo": "http://hst.tradedoubler.com/file/17833/2014-logos/200X200.png",
"programName": "Nelly NO",
"id": "57b3cafbe4b06cf59bc254bf"
}],
"categories": [{
"name": "Kvinne > KLÆR > Jeans > Straight"
}]
}]
}
Существует много несвязанных кода здесь. Можете ли вы уменьшить это до уровня безопасности кода, который показывает ошибку? –
К сожалению, я не могу воспроизвести эту проблему в уменьшенном тестовом примере. Все, что у меня есть, это https://gist.github.com/anonymous/8c43887a995102566888e649392a3d54, но это далеко не так. –
Вы всегда можете поставить задачу рейка в пустое приложение для рельсов и проверить его там. –