Created
October 27, 2015 15:55
-
-
Save kaedroho/bb017682c14717be2472 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
from django.utils import timezone | |
from wagtail.wagtailsearch.backends.elasticsearch import ElasticSearch, ElasticSearchQuery | |
from wagtail.wagtailcore.models import Page | |
from wagtail.wagtailimages.models import AbstractImage | |
from wagtail.wagtaildocs.models import Document | |
class ElasticSearchQueryWithRecency(ElasticSearchQuery): | |
""" | |
An elasticsearch query class that takes recency into account | |
""" | |
def get_inner_query(self): | |
if issubclass(self.queryset.model, Page): | |
created_at_field = 'first_published_at_filter' | |
elif issubclass(self.queryset.model, (AbstractImage, Document)): | |
created_at_field = 'created_at_filter' | |
else: | |
created_at_field = None | |
if created_at_field: | |
return { | |
"function_score": { | |
"query": super().get_inner_query(), | |
"functions": [ | |
{ | |
"gauss": { | |
created_at_field: { | |
"origin": timezone.now(), | |
"offset": "7d", | |
"scale": "100d", | |
"decay": 0.5, | |
} | |
} | |
} | |
] | |
} | |
} | |
else: | |
return super().get_inner_query() | |
class CustomElasticSearch(ElasticSearch): | |
search_query_class = ElasticSearchQueryWithRecency | |
SearchBackend = CustomElasticSearch |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment