How do I convert a Ruby hash to XML?
Here is the specific XML I ultimately need:
<?xml version="1.0" encoding="UTF-8"?>
<customer>
<email>joe@example.com</email>
<first_name>Joe</first_name>
<last_name>Blow</last_name>
</customer>
But say I have a controller (Ruby on Rails) that is send开发者_如何学编程ing the data to a method. I'd prefer to send it as a hash, like so:
:first_name => 'Joe',
:last_name => 'Blow',
:email => 'joe@example.com'
So, how can I convert the hash to that XML format?
ActiveSupport adds a to_xml
method to Hash, so you can get pretty close to what you are looking for with this:
sudo gem install activesupport
require "active_support/core_ext"
my_hash = { :first_name => 'Joe', :last_name => 'Blow', :email => 'joe@example.com'}
my_hash.to_xml(:root => 'customer')
And end up with:
<?xml version="1.0" encoding="UTF-8"?>
<customer>
<last-name>Blow</last-name>
<first-name>Joe</first-name>
<email>joe@example.com</email>
</customer>
Note that the underscores are converted to dashes.
Gem gyoku very nice.
Gyoku.xml(:lower_camel_case => "key")
# => "<lowerCamelCase>key</lowerCamelCase>"
Gyoku.xml({ :camel_case => "key" }, { :key_converter => :camelcase })
# => "<CamelCase>key</CamelCase>"
Gyoku.xml({ acronym_abc: "value" }, key_converter: lambda { |key| key.camelize(:lower) })
# => "<acronymABC>value</acronymABC>"
and more useful options.
If this data is a model, look at overriding to_xml
.
Otherwise, Builder is a good option.
I would suggest a gem like XmlSimple which provides this kind of facility.
I did a short presentation about exactly that topic at my university a while back. Here are the slides (Interesting part starts at >= page 37)
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