View source: R/sample_resources.R
fhir_count_resource | R Documentation |
Downloads a count of resources matching the resource type and search parameters specified in resource
and parameters
.
This function makes use of the _summary=count
parameter of FHIR search and is therefore able to count resources on the server
without actually downloading them.
fhir_count_resource( base_url, resource, parameters = NULL, username = NULL, password = NULL, token = NULL, add_headers = NULL )
base_url |
A character vector of length one specifying the base URL of the FHIR server, e.g. |
resource |
A character vector of length one or fhir_resource_type object with the resource type to be searched, e.g. |
parameters |
Optional. Either a length 1 character vector containing properly formatted FHIR search parameters, e.g.
|
username |
A character vector of length one containing the username for basic authentication. |
password |
A character vector of length one containing the password for basic authentication. |
token |
A character vector of length one or object of class httr::Token, for bearer token authentication (e.g. OAuth2). See |
add_headers |
A named character vector of custom headers to add to the HTTP request, e.g. |
For more information on authentication options, please see the help page of fhir_search()
An integer of length 1 containing the number of resources matching the type and search parameters specified in resource
and parameters
.
#the try({}, silent = TRUE) statement is only there to catch errors when the server is down #you can skip it when the server is reachable try({ #number of female Patient resources on the server fhir_count_resource( base_url = 'https://vonk.fire.ly/R4', resource = "Patient", parameters = c(gender = "female")) }, silent = TRUE)
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