multilanguage haystack search index, with aldryn_search

search_indexes.py

from __future__ import unicode_literals

from aldryn_search.base import AldrynIndexBase
from django.template.loader import render_to_string
from haystack import indexes

from bodenschatz.models import Product


class ProductIndex(AldrynIndexBase, indexes.Indexable):
    text = indexes.NgramField(document=True, use_template=False)
    title = indexes.NgramField()
    type = indexes.CharField()
    montage = indexes.CharField()
    url = indexes.CharField()

    def get_model(self):
        return Product

    def get_index_queryset(self, language):
        return self.get_model().objects.published()

    def prepare_type(self, object):
        return 'product'

    def prepare_montage(self, object):
        return object.montage

    def get_search_data(self, obj, language, request):
        context = {'object': obj, }
        search_text = render_to_string('search/indexes/bodenschatz/product_text.txt', context)
        return search_text

    def prepare_fields(self, obj, language, request):
        # self.prepared_data['language'] = language
        # translated fields shall be set right here!
        self.prepared_data['url'] = obj.get_absolute_url()
        self.prepared_data['title'] = obj.title