> ## Documentation Index > Fetch the complete documentation index at: https://forest-docs-mcp-server-agent-url.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Another example For the purpose of this example let's say we have an `activity-logs` index in Elasticsearch with the following mapping. ## Implementing the GET (all records with a filter on related data) This is a complex use case: How to handle filters on related data. We want to be able to filter using the `user.mail` field.\ \ To accommodate you we already provide you a simple service [`ElasticsearchHelper`](https://docs.forestadmin.com/woodshop/how-tos/create-a-smart-collection-with-elasticsearch/elasticsearch-service-utils) that handles all the logic to connect with your Elasticsearch data. ## Implementing the GET (all records with the search) Another way to search through related data is to implement your own search logic.