Overview

The following article introduces how to filter results by deeply nested fields.

How to Filter Results on Deeply Nested fields in Strapi

Learn about different ways to deeply filter results using Strapi’s REST, Entity Service, Query Engine and GraphQL API.

strapi.io

As described above, by preparing the content types and fields, I was able to obtain the intended results.

Notes

As mentioned in the comments of the above article, the text contains "" characters, but these appear to be unnecessary.

• Incorrect

GET /api/books?filters\[authors\][hobby][$contains]=dance

By using the query without "" as follows, the intended results were obtained.

• Correct

GET /api/books?filters[authors][hobby][$contains]=dance

Summary

I hope this serves as a helpful reference.