De-serialise plain hashes into objects.
The rationale behind this is to be able to take input from external sources such as REST calls or log files and turn them into graphs of objects or find out why they cannot be tranformed.
This is the first cut of the code and it currently only handles a small number of types but you can add your own already. Better default types will be coming soon.
Add this line to your application's Gemfile:
gem 'objectifier'
And then execute:
$ bundle
Or install it yourself as:
$ gem install objectifier
Create custom transformers, create an objectifier and use it to de-serialise hashes.
require 'objectifier'
require 'money'
# Add a custom tranformer for Money values
Objectifier.factories.add_type(
:money,
->(name, value) {
Objectifier::ValueResult.new(name, Money.new(value["amount"], value["code"]))
})
# define an objectifier that can be used to de-serialise a given format
obj = Objectifier.define do
item :name, type: :string, required: false
items :accounts, type: :integer
item :budget, type: :money
item :length, type: :integer, required: false
map :activity do
item :clicks, type: :integer
item :ctr, type: :float
end
end
# some test parameters
parameters = {
"name" => "Billy",
"accounts" => [ "100", "300", "150", "23" ],
"budget" => {
"amount" => "10.00.0",
"code" => "GBP",
},
"length" => "42",
"activity" => {
"clicks" => "83351",
"ctr" => "3.1",
},
}
# transform input into real objects or return detailed error messages
result = obj.call(parameters)
if result.success?
puts result.value
else
puts result
end
After checking out the repo, run bin/setup
to install dependencies. Then, run rake spec
to run the tests. You can also run bin/console
for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install
. To release a new version, update the version number in version.rb
, and then run bundle exec rake release
, which will create a git tag for the version, push git commits and tags, and push the .gem
file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/wiggly/objectifier.
The gem is available as open source under the terms of the MIT License.