我如何将这个哈希结合到单个JSON对象? [英] How do I combine this Hash to a single JSON object?
问题描述
我使用以下代码生成包含特定网站所有类别信息的JSON文件。
目标是让JSON文件具有以下内容格式:
[
{
id:36_17,
name :Diversen Particulier,
group:Diversen,
search_attributes:{
0:Prijs van / tot,
1 :Groep en Rubriek,
2:Conditie,
}
},
{
id:36_18,
name:Diversen Zakelijk,
group:Diversen,
search_attributes:{
0:Prijs van / tot,
1:Groep en Rubriek,
2:Conditie,
}
},
{
id:36_19,
name:Overige Diversen,
group:Diversen,
search_attributes:{
0:Prijs van / tot,
1:Groep en Rubriek,
2:Conditie,
} {...}
]
但我一直得到这样的格式:
[
{
id:36_17,
name:Diversen Particulier,
group:Diversen,
search_attributes:{0:Prijs van / tot}
},
id:36_17,
name:Diversen Particulier,
group:Diversen,
search_attributes:{ 1:Groep en Rubriek}
},
{
id:36_17,
name:Diversen Particulier,
group:Diversen,
search_attributes:{2:Conditie}
},{...}
]
我使用下面的代码:
require'mechanize'
@hashes = []
#初始化机械化对象
a = Mechanize.new
#开始刮取
a.get('http:// www .marktplaat s.nl/')do | page |
groups = page.search('// * [(@ id =navigation-categories)] // a')
groups.each_with_index do | group,index_1 |
a.get(group [:href])do | page_2 |
categories = page_2.search('// * [(@ id =category-browser)] // a')
categories.each_with_index do | category,index_2 |
a.get(category [:href])do | page_3 |
search_attributes = page_3.search('// * [contains(concat(,@class,),concat(,heading,))]')
search_attributes.each_with_index do | attribute,index_3 |
item = {
id:#{index_1} _#{index_2},
name:category.text,
group:group.text,
: search_attributes => {
:index_3.to_s => #{attribute.text unless attribute.text =='Outlet'}
}
}
@hashes<<项目
提取项目
结束
结束
结束
结束
结束
结束
#打开文件并开始
File.open(json / light /#{Time.now.strftime'%Y%m%d%H%M%S'} _ light_categories.json,'w ')do | f |
puts'#将类别数据写入JSON文件'
f.write(@ hashes.to_json)
puts| ----------->完成。 {@ hashes.length}写入。
end
puts'#Finished。'
是什么导致这种情况,我该如何解决它?
更新
以下是工作代码:
require'mechanize '
@hashes = []
#初始化机械化对象
a = Mechanize.new
#开始刮取
a .get('http://www.marktplaats.nl/')do | page |
groups = page.search('// * [(@ id =navigation-categories)] // a')
groups.each_with_index do | group,index_1 |
a.get(group [:href])do | page_2 |
categories = page_2.search('// * [(@ id =category-browser)] // a')
categories.each_with_index do | category,index_2 |
a.get(category [:href])do | page_3 |
search_attributes = page_3.search('// * [contains(concat(,@class,),concat(,heading,))]')
attributes_hash = {}
search_attributes.each_with_index do |属性,index_3 |
attributes_hash [index_3.to_s] =#{attribute.text unless attribute.text =='Outlet'}
end
item = {
id: #{index_1}。#{index_2},
name:category.text,
group:group.text,
:search_attributes => attributes_hash
}
@hashes<<项目
放置项目
结束
结束
结束
结束
结束
#打开文件并开始
File.open(json / light /#{Time.now.strftime'%Y%m%d%H%M%S'} _ light_categories.json,'w')do | f |
puts'#将类别数据写入JSON文件'
f.write(@ hashes.to_json)
puts| ----------->完成。 {@ hashes.length}写入。
end
$ b $ puts'#Finished。'
最内部的 each_with_index
应该仅用于生成 search_attributes
hash,而不是结果中顶层数组的元素散列。
#开始刮取
a.get('http ://www.marktplaats.nl/')do | page |
groups = page.search('// * [(@ id =navigation-categories)] // a')
groups.each_with_index do | group,index_1 |
a.get(group [:href])do | page_2 |
categories = page_2.search('// * [(@ id =category-browser)] // a')
categories.each_with_index do | category,index_2 |
a.get(category [:href])do | page_3 |
search_attributes = page_3.search('// * [contains(concat(,@class,),concat(,heading,))]')
attributes_hash = {}
search_attributes.each_with_index do |属性,index_3 |
attributes_hash [index_3.to_s] =#{attribute.text unless attribute.text =='Outlet'}
end
@hashes<< {
id:#{index_1} _#{index_2},
name:category.text,
group:group.text,
search_attributes:attributes_hash
}
结束
结束
结束
结束
结束
I'm using the following code to generate a JSON file containing all category information for a particular website.
The goal is to have a JSON file with the following format:
[
{
"id":"36_17",
"name":"Diversen Particulier",
"group":"Diversen",
"search_attributes":{
"0":"Prijs van/tot",
"1":"Groep en Rubriek",
"2":"Conditie",
}
},
{
"id":"36_18",
"name":"Diversen Zakelijk",
"group":"Diversen",
"search_attributes":{
"0":"Prijs van/tot",
"1":"Groep en Rubriek",
"2":"Conditie",
}
},
{
"id":"36_19",
"name":"Overige Diversen",
"group":"Diversen",
"search_attributes":{
"0":"Prijs van/tot",
"1":"Groep en Rubriek",
"2":"Conditie",
}
}, {...}
]
But I keep getting this format:
[
{
"id":"36_17",
"name":"Diversen Particulier",
"group":"Diversen",
"search_attributes":{"0":"Prijs van/tot"}
},
{
"id":"36_17",
"name":"Diversen Particulier",
"group":"Diversen",
"search_attributes":{"1":"Groep en Rubriek"}
},
{
"id":"36_17",
"name":"Diversen Particulier",
"group":"Diversen",
"search_attributes":{"2":"Conditie"}
}, {...}
]
The search_attributes
are not getting saved correctly.
I'm using the following code:
require 'mechanize'
@hashes = []
# Initialize Mechanize object
a = Mechanize.new
# Begin scraping
a.get('http://www.marktplaats.nl/') do |page|
groups = page.search('//*[(@id = "navigation-categories")]//a')
groups.each_with_index do |group, index_1|
a.get(group[:href]) do |page_2|
categories = page_2.search('//*[(@id = "category-browser")]//a')
categories.each_with_index do |category, index_2|
a.get(category[:href]) do |page_3|
search_attributes = page_3.search('//*[contains(concat( " ", @class, " " ), concat( " ", "heading", " " ))]')
search_attributes.each_with_index do |attribute, index_3|
item = {
id: "#{index_1}_#{index_2}",
name: category.text,
group: group.text,
:search_attributes => {
:index_3.to_s => "#{attribute.text unless attribute.text == 'Outlet '}"
}
}
@hashes << item
puts item
end
end
end
end
end
end
# Open file and begin
File.open("json/light/#{Time.now.strftime '%Y%m%d%H%M%S'}_light_categories.json", 'w') do |f|
puts '# Writing category data to JSON file'
f.write(@hashes.to_json)
puts "|-----------> Done. #{@hashes.length} written."
end
puts '# Finished.'
The question is what's causing this and how do I solve it?
Update
A big thanks to arie-shaw for his answer.
Here's the working code:
require 'mechanize'
@hashes = []
# Initialize Mechanize object
a = Mechanize.new
# Begin scraping
a.get('http://www.marktplaats.nl/') do |page|
groups = page.search('//*[(@id = "navigation-categories")]//a')
groups.each_with_index do |group, index_1|
a.get(group[:href]) do |page_2|
categories = page_2.search('//*[(@id = "category-browser")]//a')
categories.each_with_index do |category, index_2|
a.get(category[:href]) do |page_3|
search_attributes = page_3.search('//*[contains(concat( " ", @class, " " ), concat( " ", "heading", " " ))]')
attributes_hash = {}
search_attributes.each_with_index do |attribute, index_3|
attributes_hash[index_3.to_s] = "#{attribute.text unless attribute.text == 'Outlet '}"
end
item = {
id: "#{index_1}.#{index_2}",
name: category.text,
group: group.text,
:search_attributes => attributes_hash
}
@hashes << item
puts item
end
end
end
end
end
# Open file and begin
File.open("json/light/#{Time.now.strftime '%Y%m%d%H%M%S'}_light_categories.json", 'w') do |f|
puts '# Writing category data to JSON file'
f.write(@hashes.to_json)
puts "|-----------> Done. #{@hashes.length} written."
end
puts '# Finished.'
The most inner each_with_index
should be only be used to generate the search_attributes
hash, rather than an element hash of the top level array in the result.
# Begin scraping
a.get('http://www.marktplaats.nl/') do |page|
groups = page.search('//*[(@id = "navigation-categories")]//a')
groups.each_with_index do |group, index_1|
a.get(group[:href]) do |page_2|
categories = page_2.search('//*[(@id = "category-browser")]//a')
categories.each_with_index do |category, index_2|
a.get(category[:href]) do |page_3|
search_attributes = page_3.search('//*[contains(concat( " ", @class, " " ), concat( " ", "heading", " " ))]')
attributes_hash = {}
search_attributes.each_with_index do |attribute, index_3|
attributes_hash[index_3.to_s] = "#{attribute.text unless attribute.text == 'Outlet '}"
end
@hashes << {
id: "#{index_1}_#{index_2}",
name: category.text,
group: group.text,
search_attributes: attributes_hash
}
end
end
end
end
end
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