How to do query elastic search on multiple index

[umaparvat]

Questions

I'm working on global search which has to search on all the elastic search index and show the response. i'm referring this page for developing API . API ` class PaginatedElasticSearchAPIView(APIView, LimitOffsetPagination): serializer_class = None document_class = None @abc.abstractmethod def generate_q_expression(self, query): """This method should be overridden and return a Q() expression."""

def get(self, request, query): try: q = self.generate_q_expression(query) search = self.document_class.search().query(q) response = search.execute()

print(f'Found {response.hits.total.value} hit(s) for query: "{query}"')

results = self.paginate_queryset(response, request, view=self)
serializer = self.serializer_class(results, many=True)
return self.get_paginated_response(serializer.data)

except Exception as e: return HttpResponse(e, status=500) `

In views.py

` class SearchUsers(PaginatedElasticSearchAPIView): serializer_class = UserSerializer document_class = UserDocument

def generate_q_expression(self, query): return Q('bool', should=[ Q('match', username=query), Q('match', first_name=query), Q('match', last_name=query), ], minimum_should_match=1) class SearchCategories(PaginatedElasticSearchAPIView): serializer_class = CategorySerializer document_class = CategoryDocument

def generate_q_expression(self, query): return Q( 'multi_match', query=query, fields=[ 'name', 'description', ], fuzziness='auto') `

The elastic search document

`

blog/documents.py from django.contrib.auth.models import User from django_elasticsearch_dsl import Document, fields from django_elasticsearch_dsl.registries import registry

from blog.models import Category, Article

@registry.register_document class UserDocument(Document): class Index: name = 'users' settings = { 'number_of_shards': 1, 'number_of_replicas': 0, }

class Django: model = User fields = [ 'id', 'first_name', 'last_name', 'username', ] ` the above code queries only particular document class.

How to query on the multiple index and get the result similar to the below elastic search api call using django-ealsticsearch-dsl ?

In elastic search we have multi index query GET /user,categories/_search { "query": { "match": { "user.id": "kim" } } }

or

GET /*/_search { "query": { "match": { "user.id": "kim" } } }