Conditional patch resource

Update parts of a resource if the resource exists based on meeting the search criteria specified by using query parameters.

Code sample

Go

Before trying this sample, follow the Go setup instructions in the Cloud Healthcare API quickstart using client libraries. For more information, see the Cloud Healthcare API Go API reference documentation.

To authenticate to Cloud Healthcare API, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"time"

	healthcare "google.golang.org/api/healthcare/v1beta1"
)

// queryParamOpt is a googleapi.Option (https://godoc.org/google.golang.org/api/googleapi#CallOption)
// that adds query parameters to an API call.
type queryParamOpt struct {
	key, value string
}

func (qp queryParamOpt) Get() (string, string) { return qp.key, qp.value }

// ConditionalPatchFHIRResource conditionally patches an FHIR resource.
func ConditionalPatchFHIRResource(w io.Writer, projectID, location, datasetID, fhirStoreID, resourceType string, active bool) error {
	// projectID := "my-project"
	// location := "us-central1"
	// datasetID := "my-dataset"
	// fhirStoreID := "my-fhir-store"
	// resourceType := "Patient"
	// active := true

	ctx := context.Background()

	healthcareService, err := healthcare.NewService(ctx)
	if err != nil {
		return fmt.Errorf("healthcare.NewService: %w", err)
	}

	fhirService := healthcareService.Projects.Locations.Datasets.FhirStores.Fhir

	parent := fmt.Sprintf("projects/%s/locations/%s/datasets/%s/fhirStores/%s", projectID, location, datasetID, fhirStoreID)

	payload := []map[string]interface{}{
		{
			"op":    "replace",
			"path":  "/active",
			"value": active,
		},
	}
	jsonPayload, err := json.Marshal(payload)
	if err != nil {
		return fmt.Errorf("json.Encode: %w", err)
	}

	call := fhirService.ConditionalPatch(parent, resourceType, bytes.NewReader(jsonPayload))

	call.Header().Set("Content-Type", "application/json-patch+json")

	// Refine your search by appending tags to the request in the form of query
	// parameters. This searches for resources updated in the last 48 hours.
	twoDaysAgo := time.Now().Add(-48 * time.Hour).Format("2006-01-02")
	lastUpdated := queryParamOpt{key: "_lastUpdated", value: "gt" + twoDaysAgo}

	resp, err := call.Do(lastUpdated)
	if err != nil {
		return fmt.Errorf("ConditionalPatch: %w", err)
	}

	defer resp.Body.Close()

	respBytes, err := io.ReadAll(resp.Body)
	if err != nil {
		return fmt.Errorf("could not read response: %w", err)
	}

	if resp.StatusCode > 299 {
		return fmt.Errorf("ConditionalPatch: status %d %s: %s", resp.StatusCode, resp.Status, respBytes)
	}
	fmt.Fprintf(w, "%s", respBytes)

	return nil
}

Python

Before trying this sample, follow the Python setup instructions in the Cloud Healthcare API quickstart using client libraries. For more information, see the Cloud Healthcare API Python API reference documentation.

To authenticate to Cloud Healthcare API, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

def conditional_patch_resource(
    service_account_json, base_url, project_id, cloud_region, dataset_id, fhir_store_id
):
    """
    If a resource is found based on the search criteria specified in
    the query parameters, updates part of that resource by
    applying the operations specified in a JSON Patch document.
    """
    url = f"{base_url}/projects/{project_id}/locations/{cloud_region}"

    # The search query in this request updates all Observations
    # if the subject of the Observation is a particular patient.
    resource_path = "{}/datasets/{}/fhirStores/{}/fhir/Observation".format(
        url, dataset_id, fhir_store_id
    )

    # Make an authenticated API request
    session = get_session(service_account_json)

    headers = {"Content-Type": "application/json-patch+json"}

    body = json.dumps(
        [
            {
                "op": "replace",
                "path": "/valueQuantity/value",
                # Sets the BPM for all matching Observations to 80. This
                # is the portion of the request being patched.
                "value": 80,
            }
        ]
    )

    # The search query is passed in as a query string parameter.
    params = {"identifier": "my-code-system|ABC-12345"}

    response = session.patch(resource_path, headers=headers, params=params, data=body)
    response.raise_for_status()

    print(response.url)

    resource = response.json()

    print(
        "Conditionally patched all Observations with the "
        "identifier 'my-code-system|ABC-12345' to use a BPM of 80."
    )
    print(json.dumps(resource, indent=2))

    return resource

What's next

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