Dynamic search like stackoverflow for django

Question

Does anyone know what plugin (with Django) is best to handle dynamic searches like StackOverflow's? Something like this :

<input type="text" value="how to [django] or [python] duplicate:yes is:answer" style="width: 50%">

I just think about complex queries.

query = request.GET.get('q')

text_query = # what regex here?
tags_query = # 
is_duplicate = re.search(r'(?P<duplicate>\w+)', query)

Question.objects.filter(...)
Answer.objects.filter(...)

Answer 1

query = "how to [django] or [python] or [mu] duplicate:yes is:answer"

tags = re.search(r'\[(\w+)\](( or \[(\w+)\])+)?', query)
colons = re.findall(r'\w+:\w+', query)

search = query.replace(tags.group(), '')
for colon in colons:
    search = search.replace(colon, '')

print(search) # how to

Then you can process tags and colons separately for querying.

If you want to search the questions database for all of the terms in the search query you could do something like this. It will find all text that contains all the search terms.

search = search.split()

db_query = Q(text__icontains=search[0])
for term in search[1:]:
    db_query = db_query | Q(text__icontains=term)

Question.objects.filter(db_query)