@rahul1, @reshma am evaluating Graphql to query FHIR data against my local setup. I have followed the request structure as provided here: https://www.medplum.com/docs/graphql/basic-queries. But I am getting the following message in the response: "Unknown operation named \"\".",. I have tried the same request against app.medplum.com but still get the same error. Here is my complete request for Postman CURL: curl --location 'http://localhost:8103/fhir/R4/$graphql' \ --header 'Content-Type: application/json' \ --header 'Authorization: Bearer xxxx' \ --data '{"query":"{\n PatientList(name: \"Eve\", address_city: \"Philadelphia\") {\n resourceType\n id\n name {\n family\n given\n }\n address {\n line\n city\n state\n postalCode\n }\n }\n}\n","variables":{}}' Request query: { PatientList(name: "Eve", address_city: "Philadelphia") { resourceType id name { family given } address { line city state postalCode } } } Response: { "errors": [ { "message": "Unknown operation named \"\".", "extensions": {} } ] } Thanks

@Amarjeet I was able to reproduce your error, and it seems like your query string in

--data

is malformed. Copying the example from the documentation, I was able to get this command to work

curl --location 'http://localhost:8103/fhir/R4/$graphql' \
--header 'Content-Type: application/json' \
--header "Authorization: Bearer $TOKEN" \
--data '{"query":"{ PatientList(name: \"Eve\", address_city: \"Philadelphia\") { resourceType id name { family given } address { line city state postalCode } } }"}'

@rahul1 , Thank you for the help. I am able to get it working with some additional changes. However, I am trying to retrieve male patients aged between 40 and 50, who have type 2 diabetic conditions. I have created the following query but it is retrieving all the male patients with empty conditions. Can you please help? Thanks. Query curl: curl --location 'http://localhost:8103/fhir/R4/$graphql' \ --header 'Content-Type: application/json' \ --header 'Authorization: Bearer eyJhbGciOiJSUzI1NiIsImtpZCI6IjEwY2NlZmI3LTA4MjUtNGY2OC1hZDcwLTkwM2VlNGMwZmZkOSIsInR5cCI6IkpXVCJ9.eyJsb2dpbl9pZCI6ImU1MDM4M2IzLWZlZjEtNGI0OC1iMjg5LTFjOGNhMWYzNDQ5NCIsInN1YiI6IjYyNjFhYTQ4LWRkMTAtNDAwZC1hNWI1LWVlMWVmMGJmZjkxNyIsInVzZXJuYW1lIjoiNjI2MWFhNDgtZGQxMC00MDBkLWE1YjUtZWUxZWYwYmZmOTE3Iiwic2NvcGUiOiJvcGVuaWQiLCJwcm9maWxlIjoiUGF0aWVudC80ODk4ZTFhMy1kZTJiLTRhOTAtODFmNy01OWQxMTU2YmRkYmUiLCJpYXQiOjE2OTQ0NDc5NDgsImlzcyI6Imh0dHA6Ly9sb2NhbGhvc3Q6ODEwMy8iLCJleHAiOjE2OTQ0NTE1NDh9.YA7I617DbqHpC71mb6Ea7Kdvsee9xotC1cZkt5wSpHkeuE2BM8wqdHyKr6i_fJQ6qA3jW03Eo2Bd16lDyir8sPoTaoLyeWw6oi5uuKkLrXEENrr6gL2XSRszRgn8YKxYn-oWG4ndi3rcOqYToG9yGhtohEExRXSBY-92kFK8tXfS7eJyKzaghheJXYRA2VGAMepR0WPOvC67Q5vLPSlCYzvA-pR2y_cvMtjhFR-1gHUF5ha8Tt6CcwCc7etm2tB0wMAR7Fnt5CigJayYCiJiTN_3grGf71EKHVnz9j6LMQjTnPvCbNKe4Ug4be1e-ES9E33vQcDKOCKBIxeJnLesvw' \ --data '{"query":"query {\n PatientList(gender: \"male\") {\n resourceType\n id\n name {\n family\n given\n }\n address {\n line\n city\n state\n postalCode\n }\n ConditionList(_reference: subject) {\n resourceType\n id\n code {\n coding(code : \"44054006\") {\n system,\n code\n }\n }\n }\n }\n}\n","variables":{}}'

Hi @Amarjeet . The functionality you're describing is called "Search chaining". Medplum doesn't yet support this kind of query out of the box, but it is on our roadmap

@rahul1, Thank you for the update.