Collect & Inject Values Requests

Maryk allows values from one response to be injected into another request. You can request an object, collect specific values from the response and use them in a follow‑up request on the same or a different data model.

This approach avoids multiple round trips between client and datastore by bundling related operations into a single request.

Combining several requests in one reduces latency and improves overall throughput.

The example below collects and injects values to fetch the friends of two people.

Example: Fetching all data of the Friends of Two Persons

Requests(
    CollectRequest(
        "collectedResponse",
        Person.get(
            Person.key("dR9gVdRcSPw2molM1AiOng"),
            Person.key("Vc4WgX/mQHYCSEoLtfLSUQ")
        )
    ),
    // This get request needs to be defined as an ObjectValues object so the response can be injected later
    GetRequest.create(context = context) {
        from with Person
        keys with Inject(
            "collectedResponse",
            // Reference to the friends within the Values of the response
            ValuesResponse { values.atAny { values.refWithDM(Person) { friends } } }
        )
    }
)

First we send a CollectRequest to fetch two people and store the response as collectedResponse.

Next we define a GetRequest to fetch their friends. injectWith pulls the friend references from collectedResponse and injects them into the new request.

Conclusion

Collect & Inject enables dynamic request workflows by consolidating related queries, reducing round trips and speeding up data retrieval.