gistfile1.py

from .. import RelationshipTo, StructuredNode, StringProperty
from .core import NodeIndexManager

class Language(StructuredNode):
    code = StringProperty(unique_index=True)
    name = StringProperty()


class LocalisedIndex(NodeIndexManager):
  """ Only return results in current language """
  def _execute(self, query):
      code = translation.get_language().replace('-', '_')
      language = Language.index.get(code=code)
      query = """
          START lang = node({self}),
          lnode = node:%s({query})
          MATCH (lnode)-[:LANGUAGE]->(lang)
          RETURN lnode
      """ % (self.__class__.__name__) # set index name
      result = language.cypher(query, {'query': query})
      return result[0][0] if result else []


class Multilingual(object):
    languages = RelationshipTo("Language", "LANGUAGE")

    index = LocalisedIndex()

    def __init__(self, *args, **kwargs):
        try:
            super(Multilingual, self).__init__(*args, **kwargs)
        except TypeError:
            super(Multilingual, self).__init__()

    def attach_language(self, lang):
        self.languages.connect(lang)

    def detach_language(self, lang):
        self.languages.disconnect(lang)

    def has_language(self, lang):
        pass