Convert array of object to xml

ruby-talk
1

Hi all,

I have an array containing objects of different classes.Each class is
basically hash containing attribute/value pairs. Now how can we convert
it to xml format?

Any suggestions will be appreciated.

···

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2

Hmm I have to do some guessing here

the base idea is that you need hashes as elements, thus parting from
the hypothetical problem

[ :a, 42, "a"].to_xml
RuntimeError: Not all elements respond to to_xml

you can do something like this

[ :a, 42, "xxx"].map{|x| { :name => x } }.to_xml
=> "<?xml version="1.0" encoding="UTF-8"?>\n<records type="array">\n
<record>\n <name type="symbol">a</name>\n </record>\n <record>\n
  <name type="integer">42</name>\n </record>\n <record>\n
<name>xxx</name>\n </record>\n</records>\n"

If you still have problems it would be helpful to post some code, one
would need to look into the ary

HTH
R.

···

On Tue, Aug 24, 2010 at 6:33 AM, Shyam Krishna Khadka <shyamkkhadka@gmail.com> wrote:

--
The best way to predict the future is to invent it.
-- Alan Kay

3

Robert Dober wrote:

Hmm I have to do some guessing here

the base idea is that you need hashes as elements, thus parting from
the hypothetical problem

[ :a, 42, "a"].to_xml
RuntimeError: Not all elements respond to to_xml

you can do something like this

[ :a, 42, "xxx"].map{|x| { :name => x } }.to_xml
=> "<?xml version="1.0" encoding="UTF-8"?>\n<records type="array">\n
<record>\n <name type="symbol">a</name>\n </record>\n <record>\n
  <name type="integer">42</name>\n </record>\n <record>\n
<name>xxx</name>\n </record>\n</records>\n"

If you still have problems it would be helpful to post some code, one
would need to look into the ary

HTH
R.

Thanks for your reply.
But I am afraid that it works only in rails console, not in irb console.
This is because to_xml method is defined inside ActiveSupport of rails.
But I want pure ruby code to convert to xml.

Actually in my case, array is the collection of objects. And object is
basically collection of hashes. Finally I made it own using REXML.
For reference see :

···

On Tue, Aug 24, 2010 at 6:33 AM, Shyam Krishna Khadka > <shyamkkhadka@gmail.com> wrote:

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4

I used rc for my convenience, but why not use ActiveSupport without rails?
REXML might or might not be the best choice for your problem...

Cheers
R.

···

On Wed, Aug 25, 2010 at 5:26 AM, Shyam Krishna Khadka <shyamkkhadka@gmail.com> wrote:

--
The best way to predict the future is to invent it.
-- Alan Kay

5

Robert Dober wrote:

I agree with you. But for my case, I am writing pure ruby gem that has
to convert an array of different objects into xml. So using
ActiveSupport inside ruby code seemed to be weird one.

For now, REXML is appropriate for me.

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