我有一个YAML file of groups我希望进入名为群组的MongoDB集合,其中包含{"name" => "golf", "parent" => "sports"}
等文档(顶级群组,如体育,只有{"name" => "sports"}
没有{ {1}}。)
我们正在尝试traverse the nested hash,但我不确定它是否正常工作。我更喜欢使用递归方法而不是lambda proc。我们应该改变什么来使其发挥作用?
谢谢!
马特
答案 0 :(得分:2)
这是工作代码:
require 'mongo'
require 'yaml'
conn = Mongo::Connection.new
db = conn.db("acani")
interests = db.collection("interests")
@@interest_id = 0
interests_hash = YAML::load_file('interests.yml')
def interests.insert_interest(interest, parent=nil)
interest_id = @@interest_id.to_s(36)
if interest.is_a? String # base case
insert({:_id => interest_id, :n => interest, :p => parent})
@@interest_id += 1
else # it's a hash
interest = interest.first # get key-value pair in hash
interest_name = interest[0]
insert({:_id => interest_id, :n => interest_name, :p => parent})
@@interest_id += 1
interest[1].each do |i|
insert_interest(i, interest_name)
end
end
end
interests.insert_interest interests_hash
答案 1 :(得分:0)
您的问题是如何转换此代码:
insert_enumerable = lambda {|obj, collection|
# obj = {:value => obj} if !obj.kind_of? Enumerable
if(obj.kind_of? Array or obj.kind_of? Hash)
obj.each do |k, v|
v = (v.nil?) ? k : v
insert_enumerable.call({:value => v, :parent => obj}, collection)
end
else
obj = {:value => obj}
end
# collection.insert({name => obj[:value], :parent => obj[:parent]})
pp({name => obj[:value], :parent => obj[:parent]})
}
...使用方法而不是lambda?如果是,那么:
def insert_enumerable( obj, collection )
# obj = {:value => obj} if !obj.kind_of? Enumerable
if(obj.kind_of? Array or obj.kind_of? Hash)
obj.each do |k, v|
v = (v.nil?) ? k : v
insert_enumerable({:value => v, :parent => obj}, collection)
end
else
obj = {:value => obj}
end
# collection.insert({name => obj[:value], :parent => obj[:parent]})
pp({name => obj[:value], :parent => obj[:parent]})
end
如果那不是您所要求的,请帮助澄清。