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 repl_re = re.compile(r"^'|[^\'\-_\s\w]|'$", re.UNICODE)
   7 sing_quote_re = re.compile(r"\'+")
   8
   9 @decorate(QuestionManager.search, needs_origin=False)
  10 def question_search(self, keywords):
  11     tsquery = " | ".join([k for k in repl_re.sub('', sing_quote_re.sub("'", keywords.strip())).split(' ') if k])
  12     ilike = keywords + u"%%"
  13
  14     return self.extra(
  15             tables = ['forum_rootnode_doc'],
  16             select={
  17             'ranking': """
  18                                 rank_exact_matches(ts_rank_cd('{0.1, 0.2, 0.8, 1.0}'::float4[], "forum_rootnode_doc"."document", to_tsquery('english', %s), 32))
  19                                 """,
  20             },
  21             where=["""
  22                            "forum_rootnode_doc"."node_id" = "forum_node"."id" AND ("forum_rootnode_doc"."document" @@ to_tsquery('english', %s) OR
  23                            "forum_node"."title" ILIKE %s)
  24                            """],
  25             params=[tsquery, ilike],
  26             select_params=[tsquery],
  27             order_by=['-ranking']
  28             )
  29