Ang pangunahing problema ay ang Elasticsearch ay walang katutubong paraan upang makakuha ng isang listahan ng lahat ng mga dokumento sa isang naibigay na index. Maaari mong gamitin ang search API, ngunit ito ay magbabalik lamang ng isang dokumento sa isang pagkakataon.
Gumagamit ako ng django-elasticsearch-dsl at nais kong makakuha ng listahan ng lahat ng dokumento sa index. Paano ko magagawa iyon?
A:
Maaari mong gamitin ang Search bagay mula sa django_elasticsearch_dsl. Ito ay isang subclass ng ElasticsearchDSL Paghahanap ng object, upang magamit mo rin ang lahat ng mga pamamaraan mula doon. Narito ang mga doc para diyan: https://elasticsearch-dsl.readthedocs.io/en/latest/search_dsl.html#the-search-object
Pagkuha ng lahat ng mga dokumento
<code>from django_elasticsearch_dsl import Search, Indexs = Search(index='blog')
.query('match', title='python')response = s.execute()
for hit in response: # iterate over hits from response object
print(hit) # print each hit as a dict (default)for hit in s: # iterate over hits from search query directly
print(hit) # print each hit as a dict (default)for hit in s[0:10]: # slice results to get only first 10 hits
print(hit) # print each hit as a dict (default)len(s) # number of total hits found by query (slow!) <--- this is what you want! <--- this is what you want! <--- this is what you want! <--- this is what you want! <--- this is what you want! len(response) # number of total hits found by query (slow!) <--- this is what you want! <--- this is what you want! <--- this is what you want! <--- this is what you want! list(s)[0] # first result as a Python dictionary list(response)[0] # first result as a Python dictionary response[0] # first result as an ElasticSearch Hit response[0].meta # metadata associated with the Hit response[0].meta.score # score associated with the Hit response[0].title # title field value list(response)[1]['title'] ## second result's 'title' field value<;/pre>;<;br />;>;br />;The above code will return all documents matching your query, but it will not return any fields other than _id and _type unless they are explicitly requested via source(). To retrieve more fields, use source():<;br />;from django_elasticsearch_dsl import Search, Index, F ;from elasticsearch_dsl import Q ;import json ;import pprint ;pp = pprint.PrettyPrinter();pprint = pp.pprint ;s = Search().query('match', title='python').source([ 'title', 'body' ]) ;for i in range((len(s))): pprint((json.loads((str)(s[i]).replace("'", """)))) ;## or simply do it like below :## [{'body': 'Python and Django go together like peanut butter and jelly.'
