Djapian - filtering results

Question

I use Djapian to search for object by keywords, but I want to be able to filter results. It would be nice to use Django's QuerySet API for this, for example:

if query.strip():
    results = Model.indexer.search(query).prefetch()
else:
    results = Model.objects.all()
results = results.filter(somefield__lt=somevalue)
return results

But Djapian returns a ResultSet of Hit objects, not Model objects. I can of course filter the objects "by hand", in Python, but it's not realistic in case of filtering all objects (when query is empty) - I would have to retrieve the whole table from database.

Am I out of luck with using Djapian for this?

Answer 1

I went through its source and found that Djapian has a filter method that can be applied to its results. I have just tried the below code and it seems to be working.

My indexer is as follows:

class MarketIndexer( djapian.Indexer ):

    fields = [ 'name', 'description', 'tags_string', 'state']
    tags = [('state', 'state'),]

Here is how I filter results (never mind the first line that does stuff for wildcard usage):

objects = model.indexer.search(q_wc).flags(djapian.resultset.xapian.QueryParser.FLAG_WILDCARD).prefetch()
objects = objects.filter(state=1)

When executed, it now brings Markets that have their state equal to "1".