弹性搜索聚合[python]

Question

I indexed the post and community models,

post = Index('posts')
post.settings(
    number_of_shards=1,
    number_of_replicas=0
)

@post.doc_type
class PostDocument(DocType):
    community = fields.ObjectField(properties={
        'id': fields.IntegerField(),
        'description': fields.TextField(),
        'name': fields.StringField(),
    })

I want to search posts and aggregate the communities
(returns communities of the posts in the result)

I may need to use aggregation, I had difficulties while implementing it, the documentation was not clear for me.

q = Q("multi_match", query=query, fields=['title', 'content'])
document.query(q)
document.aggs.bucket('per_tag', 'terms', field='community')

Answer 1

I think you need change the aggregation to something similar to:

document.aggs.bucket('per_tag', 'terms', field='community__id')

Because community is a complex objects, and elasticsearch only can do aggregation with simple fields. (keyword or integer)