MobileFirst 7.0 - Invoking sample Java SQL Adapter with REST API fails - ibm-mobilefirst

Question

I am following the Java SQL Adapter tutorial for MobileFirst Platform 7.
Im trying to create a new user by using REST call type #POST, but the chrome console is
POST http://192.168.56.1:10080/JavaAdapters/adapters/UserAdapter/?userId=test&lastName=test&firstName=test&password=test 409 (Conflict)
and the response is
Column 'userId' cannot be null
I think the params of this procedure are set with null value
This is my code
var userId = "test";var lastName = "test";var firstName = "test";var password = "test";
function createUser(userId,lastName,firstName,password){
busyIndicator.show();
var resourceRequest = new WLResourceRequest("/adapters/UserAdapter/", WLResourceRequest.POST);
resourceRequest.setQueryParameter("userId", userId);
resourceRequest.setQueryParameter("lastName", lastName);
resourceRequest.setQueryParameter("firstName", firstName);
resourceRequest.setQueryParameter("password", password);
resourceRequest.send().then(
createUserSuccess,
createUserFailure
);}

Answer 1

Since you are sending a POST request to the adapter you should not be using setQueryParameter because that is designed for GET requests, you should use sendFormParameters instead of send. Your updated code should look like this:
function createUser(userId, lastName, firstName, password){
busyIndicator.show();
var resourceRequest = new WLResourceRequest("/adapters/UserAdapter/", WLResourceRequest.POST);
var user = {
"userId": userId,
"firstName": firstName,
"lastName": lastName,
"password": password
};
resourceRequest.sendFormParameters(user).then(createUserSuccess).fail(createUserFailure);
}