Matching only some words in query using Django Haystack
I am currently using the following django-haystack code to do searches on my site:
def products_search_results(request):
q = request.GET['q']
from haystack.query import SearchQuerySet
products = SearchQuerySet().models(Product).filter(text=q)
This uses q as the query parameter in the search. This is also using all words in q to match the results against. This is probably (?) the intended default behavior. Here is what I am seeing.
I have a Product with a title of "Red Corvette".
Of course the search term "Red", "Red Corvette" and "Corvette" all match, but the term "Red Corvette Convertible" or "Red Corvette T-top" will not match. I would really like those to match the query, especially if there are not many results to the default query.
Is there something I can do with my haystack query to get this kind of behavior?
Use EdgeNgramField for example in your search index file:
class AppIndex(indexes.SearchIndex, indexes.Indexable):
ngram_text = indexes.EdgeNgramField()
def prepare(self, obj):
"""Add the content of text field from final prepared data into ngram_text field
"""
prepared_data = super(AppIndex, self).prepare(obj)
prepared_data['ngram_text'] = prepared_data['text']
return prepared_data
Then query on that field (Make sure to first do rebuild_index and update_index after doing above changes):
products = SearchQuerySet().models(Product).filter(ngram_text=q)