Python elasticsearch-dsl build match query dynamically

Question

Using ElasticSearch 6.x and elasticsearch-dsl python package

I am trying to generate a match query with its options form, with the query element.

I have a list of fields fields = ['field_1', 'field_2'] and I am trying to build a leaf match query using the following method

from elasticsearch_dsl.query import MultiMatch, Match, ConstantScore

def _get_match(tokens, fields, boost):        
        for index in range(len(fields)):
                field = fields[index]
                print(Match(field={"query": tokens[index], "boost": boost}))


tokens = ['token_1', 'token_2']
fields = ['field_1', 'field_2']
boost = 3
_get_match(tokens, fields, boost)

Generated output:

Match(field={'query': 'token_1', 'boost': 3})
Match(field={'query': 'token_2', 'boost': 3})

Expected output:

Match(field_1={'query': 'token_1', 'boost': 3})
Match(field_2={'query': 'token_2', 'boost': 3})

Notice, the field values instead of the field values passed in the array, the query generated used the variable name directly. How can I generate the Match query dynamically?

If I use the ** as mentioned in this SO Post it does create a dynamic query but it is in the simplified format.

Chules · Accepted Answer · 2021-05-11 10:40:57Z

0

You already mentioned the ** for unpacking a dictionary. Works fine, I only changed one line:

print(Match(** {field: {"query": tokens[index], "boost": boost}}))

answered May 11, 2021 at 10:40

Chules

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2 Comments

inxss Over a year ago

oh yea, silly me, I could have unpacked the dictionary and included other fields directly into that. Thanks a lot for making it clear.

Chules Over a year ago

@inxss, I'm glad I could help. In case this solved your problem, please consider marking it as the correct answer :) Thanks!

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