Opgelost: krijg een lijst van alle documenten in django-elasticsearch-dsl

Het grootste probleem is dat Elasticsearch geen native manier heeft om een ​​lijst te krijgen van alle documenten in een bepaalde index. U kunt de zoek-API gebruiken, maar deze retourneert slechts één document tegelijk.

Ik gebruik django-elasticsearch-dsl en ik wil een lijst met alle documenten in de index. Hoe kan ik dat doen?

A:

U kunt gebruik maken van de Search bezwaar tegen django_elasticsearch_dsl. Het is een subklasse van de ElasticsearchDSL Zoekobject, zodat u ook alle methoden van daaruit kunt gebruiken. De documenten daarvoor zijn hier: https://elasticsearch-dsl.readthedocs.io/en/latest/search_dsl.html#the-search-object

Alle documenten ophalen

<code>from django_elasticsearch_dsl import Search, Index






    s = 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!)      &lt;--- this is what you want!     &lt;--- this is what you want!     &lt;--- this is what you want!     &lt;--- this is what you want!     &lt;--- this is what you want!      len(response)             # number of total hits found by query (slow!)      &lt;--- this is what you want!     &lt;--- this is what you want!     &lt;--- this is what you want!     &lt;--- 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.'