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From: Samuel Sternhagen on 12 Aug 2010 00:40
I am trying to work with the Etsy API. I make a HTTP request and get
data back in json format. I call JSON.parse(table) and the parse method
returns the data in something that appears to be a hash.

Here is a simplified version of what JSON.parse(table) returns:

{"results"=>[{"name"=>"getMethodTable", "uri"=>"/",
"http_method"=>"GET", "type"=>"method", "defaults"=>nil, "params"=>nil,
"description"=>"Get a list of all methods available.",
"visibility"=>"public"}, {"name"=>"getSubCategory",
"uri"=>"/categories/:tag/:subtag", "http_method"=>"GET",
"type"=>"Category", "defaults"=>nil, "params"=>{"subtag"=>"string",
"tag"=>"string"}, "description"=>"Retrieves a second-level Category by
tag and subtag.", "visibility"=>"public"}, {"name"=>"getSubSubCategory",
"uri"=>"/categories/:tag/:subtag/:subsubtag", "http_method"=>"GET",
"type"=>"Category", "defaults"=>nil, "params"=>{"subtag"=>"string",
"tag"=>"string", "subsubtag"=>"string"}, "description"=>"Retrieves a
third-level Category by tag, subtag and subsubtag.",
"visibility"=>"public"}], "type"=>"method", "count"=>52, "params"=>nil}

I am trying to access each of these hashes and each of the sub hashes. I
do not think that I am using the correct syntax.

I can get some of the values by refering to:

table["results"][i] # then iterate through i

This is the code I use to access the key value pairs.

require 'rubygems'
require 'json'
require 'net/http'

class MethodTable # returns hash containing results from Etsy's API
method: getMethodTable
def get_table
url = "http://openapi.etsy.com/v2/sandbox/public/?api_key=my_key"
url = URI.parse(url)
method_list = Net::HTTP.get(url)
end
end

method_table = MethodTable.new
table = method_table.get_table
table = JSON.parse(table)

i = 1

while (i <= table["count"])

table["results"][i].each do |key, value|
print "#{key} => #{value}\n"
end
i += 1
end

table.rb:21: undefined method `each' for nil:NilClass (NoMethodError)

How can I use `each' without and error? How can I access the sub-hashes
such as the hash of parameters seen below?

"params"=>{"subtag"=>"string", "tag"=>"string", "subsubtag"=>"string"}


Thanks,

Sam
--
Posted via http://www.ruby-forum.com/.

From: jason joo on 12 Aug 2010 01:02
[Note: parts of this message were removed to make it a legal post.]

in ur example data there are only 3 items in the "result" and the element of
"count" has a value of 52
in ur for-loop u will access 3-51 ones which do not exist
u may use table["results"].size instead of table["count"]

2010/8/12 Samuel Sternhagen <samatoms(a)gmail.com>

> I am trying to work with the Etsy API. I make a HTTP request and get
> data back in json format. I call JSON.parse(table) and the parse method
> returns the data in something that appears to be a hash.
>
> Here is a simplified version of what JSON.parse(table) returns:
>
> {"results"=>[{"name"=>"getMethodTable", "uri"=>"/",
> "http_method"=>"GET", "type"=>"method", "defaults"=>nil, "params"=>nil,
> "description"=>"Get a list of all methods available.",
> "visibility"=>"public"}, {"name"=>"getSubCategory",
> "uri"=>"/categories/:tag/:subtag", "http_method"=>"GET",
> "type"=>"Category", "defaults"=>nil, "params"=>{"subtag"=>"string",
> "tag"=>"string"}, "description"=>"Retrieves a second-level Category by
> tag and subtag.", "visibility"=>"public"}, {"name"=>"getSubSubCategory",
> "uri"=>"/categories/:tag/:subtag/:subsubtag", "http_method"=>"GET",
> "type"=>"Category", "defaults"=>nil, "params"=>{"subtag"=>"string",
> "tag"=>"string", "subsubtag"=>"string"}, "description"=>"Retrieves a
> third-level Category by tag, subtag and subsubtag.",
> "visibility"=>"public"}], "type"=>"method", "count"=>52, "params"=>nil}
>
> I am trying to access each of these hashes and each of the sub hashes. I
> do not think that I am using the correct syntax.
>
> I can get some of the values by refering to:
>
> table["results"][i] # then iterate through i
>
> This is the code I use to access the key value pairs.
>
> require 'rubygems'
> require 'json'
> require 'net/http'
>
> class MethodTable # returns hash containing results from Etsy's API
> method: getMethodTable
> def get_table
> url = "http://openapi.etsy.com/v2/sandbox/public/?api_key=my_key"
> url = URI.parse(url)
> method_list = Net::HTTP.get(url)
> end
> end
>
> method_table = MethodTable.new
> table = method_table.get_table
> table = JSON.parse(table)
>
> i = 1
>
> while (i <= table["count"])
>
> table["results"][i].each do |key, value|
> print "#{key} => #{value}\n"
> end
> i += 1
> end
>
> table.rb:21: undefined method `each' for nil:NilClass (NoMethodError)
>
> How can I use `each' without and error? How can I access the sub-hashes
> such as the hash of parameters seen below?
>
> "params"=>{"subtag"=>"string", "tag"=>"string", "subsubtag"=>"string"}
>
>
> Thanks,
>
> Sam
> --
> Posted via http://www.ruby-forum.com/.
>
>

From: Samuel Sternhagen on 12 Aug 2010 01:24
jason joo wrote:
> in ur example data there are only 3 items in the "result" and the
> element of
> "count" has a value of 52
> in ur for-loop u will access 3-51 ones which do not exist
> u may use table["results"].size instead of table["count"]
>
> 2010/8/12 Samuel Sternhagen <samatoms(a)gmail.com>

In my while loop I am using "table["count"]. If you run this code it
produces output that starts with:

"{\"count\":52,\"results\":[{\"name\":\"getMethodTable\",\"description\":\"Get
a list of all methods
available.\",\"uri\":\"\\/\",\"params\":null,\"defaults\":null,\"type\":\"method\",\"visibility\":\"public\",\"http_method\":\"GET\"}

My while loop is using table["count"] as the limit. Sorry for the
confusion.
--
Posted via http://www.ruby-forum.com/.

From: jason joo on 12 Aug 2010 01:46
[Note: parts of this message were removed to make it a legal post.]

i wrote a test because ur code cannot be run on my machine

require 'json'
items = JSON.parse('{"test":12334, "test1": [{"a":1,"b":2},2,3]}')
items["test1"][0].each{|item|
p item
}
it looks good
a hash can be "each"
so try to "p" the variable before "each" it?

2010/8/12 Samuel Sternhagen <samatoms(a)gmail.com>

> jason joo wrote:
> > in ur example data there are only 3 items in the "result" and the
> > element of
> > "count" has a value of 52
> > in ur for-loop u will access 3-51 ones which do not exist
> > u may use table["results"].size instead of table["count"]
> >
> > 2010/8/12 Samuel Sternhagen <samatoms(a)gmail.com>
>
> In my while loop I am using "table["count"]. If you run this code it
> produces output that starts with:
>
>
> "{\"count\":52,\"results\":[{\"name\":\"getMethodTable\",\"description\":\"Get
> a list of all methods
>
> available.\",\"uri\":\"\\/\",\"params\":null,\"defaults\":null,\"type\":\"method\",\"visibility\":\"public\",\"http_method\":\"GET\"}
>
> My while loop is using table["count"] as the limit. Sorry for the
> confusion.
> --
> Posted via http://www.ruby-forum.com/.
>
>

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