If you feel that several document kinds in your bucket are not identified by Hackolade during the reverse-engineering process, be aware that the process requires that the bucket is indexed. This can be a primary index, but does not have to be. It can be a secondary index, as long as it on the field that serves to differentiate document types.
An easy way to check is to got to the Couchbase console http://localhost:8091/ui/index.html#/query/workbench and make sure that your bucket does not appear in the 'Non-Indexed Buckets' list.
Refer to https://developer.couchbase.com/documentation/server/current/n1ql/n1ql-language-reference/createindex.html and https://developer.couchbase.com/documentation/server/current/n1ql/n1ql-language-reference/createprimaryindex.html for more information.
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