Data binding failed - incompatibletypeerror

Question

I created a new Ballerina type as below.
const string GENERAL="GENERAL";
const string SECURITY="SECURITY";
type INCIDENT_TYPE GENERAL|SECURITY;
public type incidentNotification record {
string title;
INCIDENT_TYPE incidentType;
};
Once I send a POST request to create a new incidentNotification, sendIncident method is executed.
public function sendIncident (http:Request req, incidentNotification sendIncidentBody) returns http:Response {}
The json payload that is sent with the request body as follows.
{
"title":"title",
"incidentType": "SECURITY"
}
But when I send that json with http request, it gives the error
data binding failed: Error in reading payload : error while mapping
'incidentType': incompatible types: expected
'janaka/incident-reporting-service:0.0.1:$anonType$4|janaka/incident-reporting-service:0.0.1:$anonType$5',
found 'string'
How to solve this error?

Answer 1

It's a bug in the JSON to Record conversion and it is fixed in the ballerina latest release(v1.0.0-alpha)
import ballerina/http;
import ballerina/log;
const string GENERAL="GENERAL";
const string SECURITY="SECURITY";
type INCIDENT_TYPE GENERAL|SECURITY;
public type IncidentNotification record {
string title;
INCIDENT_TYPE incidentType;
};
service hello on new http:Listener(9090) {
#http:ResourceConfig {
methods: ["POST"],
body: "notification"
}
resource function bindJson(http:Caller caller, http:Request req,
IncidentNotification notification) {
var result = caller->respond(notification.title);
if (result is error) {
log:printError(result.reason(), err = result);
}
}
}
Above sample resource works fine for following request
curl -v http://localhost:9090/hello/bindJson -d '{ "title": "title" , "incidentType" : "SECURITY"}' -H "Content-Type:application/json"
Response:
< HTTP/1.1 200 OK
< content-type: text/plain
< content-length: 5
<
* Connection #0 to host localhost left intact
title