def get_context_data(self, **kwargs):
context = super(SearchView, self).get_context_data(**kwargs)
context["form"] = form = SearchForm(
data=self.request.GET if self.request.GET else None)
if form.is_bound and form.is_valid():
conn = get_connection()
query_string = (form.cleaned_data["q"] or "").strip()
if query_string:
if form.cleaned_data.get("use_match_query"):
query = MatchQuery("_all", query_string)
else:
query = QueryStringQuery("*" + query_string + "*")
else:
query = MatchAllQuery()
if form.cleaned_data["only_people"]:
min_h = form.cleaned_data.get("person_height_min")
max_h = form.cleaned_data.get("person_height_max")
if min_h is not None or max_h is not None:
rq = RangeQuery()
rq.add_range("height", gte=min_h, lte=max_h)
query = BoolQuery(must=[query, rq])
context["results"] = conn.search(
Search(query=query,
filter=PrefixFilter(_type="people"),
fields=["name", "street", "height"]))
else:
context["results"] = conn.search(
Search(query, highlight=("abstract", )))
return context
def generate_date_tail_boost_queries(field,
timedeltas_and_boosts,
relative_to=None):
"""
Generate a list of RangeQueries usable to boost the scores of more recent documents.
Example:
```
queries = generate_date_tail_boost_queries("publish_date", {
timedelta(days=90): 1,
timedelta(days=30): 2,
timedelta(days=10): 4,
})
s = Search(BoolQuery(must=..., should=queries))
# ...
```
Refs: http://elasticsearch-users.115913.n3.nabble.com/Boost-recent-documents-td2126107.html#a2126317
:param field: field name to generate the queries against
:param timedeltas_and_boosts: dictionary of timedelta instances and their boosts. Negative or zero boost values will not generate rangequeries.
:type timedeltas_and_boosts: dict[timedelta, float]
:param relative_to: Relative to this datetime (may be None for "now")
:return: List of RangeQueries
"""
relative_to = relative_to or datetime.datetime.now()
times = {}
for timedelta, boost in timedeltas_and_boosts.items():
date = (relative_to - timedelta).date()
times[date] = boost
times = sorted(times.items(), key=lambda i: i[0])
queries = []
for x in range(len(times)):
kwargs = {"field": field, "boost": times[x][1]}
if x == 0:
kwargs["lte"] = times[x][0]
else:
kwargs["gt"] = times[x][0]
if x < len(times) - 1:
kwargs["lte"] = times[x + 1][0]
if kwargs["boost"] > 0:
q = RangeQuery()
q.add_range(**kwargs)
queries.append(q)
return queries
