Send Json Object to Spring Controller - json

Question

Hy guys.
I have this js code, where I create an object to send to a Spring controller via Ajax function:
$('#eventsdatageneral').on('click', '.btn.btn-info', function(event)
{
var today_date = new Date().getTime();
var dataToSend = new Object();
dataToSend.dateToSend = today_date;
dataToSend.nameToSend = host_name;
dataToSend.typeToSend = type_name;
console.log(dataToSend);
event.preventDefault();
//here starts the code to sending data to Spring controller
$.ajax({
url: "../todaydatarecover.json",
type: "post",
data: dataToSend,
success : function() {
console.log("Invio riuscito.");
//console.log(moment(today_date).format('DD/MM/YYYY'));
}
});
});
This is the controller:
#PostMapping(value="/todaydatarecover.json")
#ResponseBody
public ModelAndView todayInfoAndIdRecover(ModelAndView model, HttpServletRequest request,
#RequestParam(name="dateToSend", required=false) long dateInBox,
#RequestParam(name="nameToSend", required=false) String nameInBox,
#RequestParam(name="typeToSend", required=false) String typeInBox) throws IOException
{
//First of all, we invoke getinfo methods to take info and id
Timestamp date = new Timestamp(dateInBox);
Events event = networks.getInfoandId(nameInBox, typeInBox, date);
//Second, we put this list in the model and set properties for jquery datatables
model.addObject("data", event);
//Verify id and info
System.out.println("The info is: " + event.getInfo());
System.out.println("The id is: " + event.getId());
//Finally, we return the model
return model;
}
When I try to execute, i got an org.springframework.dao.EmptyResultDataAccessExceptionIncorrect result size: expected 1, actual 0; but, if I query the DB via MySQL client, i can take the correct result without problems. So, there is a row that match the query I perform; this make me think that the problem is how I create the Json Object and/or I send it to Controller.
What's my error?

Answer 1

When sending informations with data, it's in the request's body, you can't retrieve your data with #RequestParam. You need to use #RequestBody and create and object with your three variables.
Example :
#PostMapping(value="/todaydatarecover.json")
#ResponseBody
public ModelAndView todayInfoAndIdRecover(#RequestBody TodayData todayData, ModelAndView model, HttpServletRequest request) throws IOException
{