Unknown key for a START_ARRAY in [index].

[adityajain-deqode]

I was upgrading rails from 6 to 6.1 and ruby from 2.6.7 to 3. In the same time I upgraded chewy from 5.0.0 to 6.0 and elasticsearch from 5 to 6. But, I didn't upgrade Elasticsearch Server which is already running on 5.6.16-alpine.

In my project we are using define_types at many places. So, when I look for search query I am getting this error:

[400] {"error":{"root_cause":[{"type":"parsing_exception","reason":"Unknown key for a START_ARRAY in [index].","line":1,"col":10}],"type":"parsing_exception","reason":"Unknown key for a START_ARRAY in [index].","line":1,"col":10},"status":400}

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Expected behavior

It should work as before. Is should return indexed object in right manner.

Actual behavior

It was returning error:
[400] {"error":{"root_cause":[{"type":"parsing_exception","reason":"Unknown key for a START_ARRAY in [index].","line":1,"col":10}],"type":"parsing_exception","reason":"Unknown key for a START_ARRAY in [index].","line":1,"col":10},"status":400}.

When I observed I found here is some change in Index object like:
Before
<Dub::Index::OrganisationEntityIndex::Query {:index=>["organisation_entity"], :type=>["organisation_entity"], :body=>{:sort=>[{"_script"=>{:script=>{:file=>"group-account", :lang=>"painless", :params=>{:group_id=>1}}, :type=>"number", :order=>"desc"}}, {"primary_sort"=>:asc}], :size=>20, :from=>0, :query=>{:bool=>{:filter=>[{:terms=>{"belongs_to_group_id"=>[1]}}, {:term=>{:join_field=>"account"}}]}}}, :search_type=>"dfs_query_then_fetch"}>

After
<Dub::Index::OrganisationEntityIndex::Query {:body=>{:index=>["organisation_entity"], :type=>["organisation_entity"], :sort=>[{"_script"=>{:script=>{:file=>"group-account", :lang=>"painless", :params=>{:group_id=>1}}, :type=>"number", :order=>"desc"}}, {"primary_sort"=>:asc}], :size=>20, :from=>0, :query=>{:bool=>{:filter=>[{:terms=>{"belongs_to_group_id"=>[1]}}, {:term=>{:join_field=>"account"}}]}}}, :search_type=>"dfs_query_then_fetch"}>

Version Information

Share here essential version information such as:

• Chewy version 5.2
• Elasticsearch version gem version 5.0.5 server version 5.6.16
• Ruby version 3.0.0
• Rails version 6.1