Freebase::Importers

Some help for getting Freebase data into a more flat form.

Installation

gem 'freebase-importers'
require 'freebase_importers'

Usage

Figure out your query via https://www.freebase.com/query

Then define a model to make that query and load accessors with results.

class Book < FreebaseImporters::Base
  map :name
  map :characters, []

  add_to_mql :"type", "/book/book"

  add_to_mql :"/book/written_work/author", []
  add_method :authors, CommonAccessors.single(:"/book/written_work/author")

  add_to_mql :genre, []
  add_method :genres,  -> { data['genre'] }
  add_method :genre,   -> { genres.first   }

  add_to_mql :"/book/written_work/date_of_first_publication"
  add_method :date_of_first_publication, -> {
    pub = data["/book/written_work/date_of_first_publication"]
    pub ? Date.parse(pub) : nil rescue pub
  }
end

map is good when you want to modify mql to get a value from Freebase and also create an accessor with the same name.

add_to_mq just modifies mql.

add_method just adds a method.

After defining a model, you query it like:

# "all" is a bit of a misnomer, actually just
# makes one query for a default of 100 records
Book.all do |book|
  puts "#{book.name}, #{book.date_of_first_publication}"
end

# endless is not a misnomer ...
# records will keep coming until Google quits sending them
# The argument indicates the duration to pause between requests.
Book.endless(7) do |book|
  puts "#{book.name}, #{book.date_of_first_publication}"
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request