forum_modules/pgfulltext/handlers.py

   1 import re
   2 from django.db.models import Q
   3 from forum.models.question import Question, QuestionManager
   4 from forum.modules.decorators import decorate
   5
   6 @decorate(QuestionManager.search, needs_origin=False)
   7 def question_search(self, keywords):
   8     repl_re = re.compile(r"[^\'\-_\s\w]", re.UNICODE)
   9     tsquery = " | ".join([k for k in repl_re.sub('', keywords).split(' ') if k])
  10     ilike = keywords + u"%%"
  11
  12     return self.extra(
  13                     tables = ['forum_rootnode_doc'],
  14                     select={
  15                         'ranking': """
  16                                 rank_exact_matches(ts_rank_cd('{0.1, 0.2, 0.8, 1.0}'::float4[], "forum_rootnode_doc"."document", to_tsquery('english', %s), 32))
  17                                 """,
  18                     },
  19                     where=["""
  20                            "forum_rootnode_doc"."node_id" = "forum_node"."id" AND ("forum_rootnode_doc"."document" @@ to_tsquery('english', %s) OR
  21                            "forum_node"."title" ILIKE %s)
  22                            """],
  23                     params=[tsquery, ilike],
  24                     select_params=[tsquery],
  25                     order_by=['-ranking']
  26                 )
  27