Laravel Validation fails when passing data through ajax Request - php

Question

I am passing the value of the radio button to the controller when it is selected through ajax. The validation in the controller fails saying the field is required. I logged the dataString which carries the value in beforeSend. It logged the value of the selected of radio button. I also checked the network tab's requests which has the data in the request payload. I don't understand what causes the error here.
<input type="radio" name="port_type" id="low-risk" value = "low-risk" >
if ($('#low-risk').is(":checked")) {
var p_type = $(this).val();
console.log(p_type);
showFunds(p_type);
}
Here is the function that has ajax function
function showFunds(p_type){
var hello = p_type;
//console.log(p_type);
var dataString = 'p=' +hello;
//console.log(dataString);
$.ajax({
type: "POST",
url: "/showFunds",
headers: {'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')},
data: dataString,
cache: false,
contentType: false,
processData: false,
beforeSend : function(){
console.log('logging BS');
console.log(dataString);
},
success: function(data) {
console.log(data);
},
error : function(xhr ,status ,error)
{
console.log(xhr);
},
});
}
Here is my controller
public function showFunds(Request $request){
$validator = \Validator::make($request->all(),[
'p' => 'required',
]);
if ($validator->fails()) {
//return response()->json(['msg'=>'val_fail']);
return response()->json(['msg'=>$validator->errors()]);
}
else{ }
The validator failing sending the errors "The p field is required."

Answer 1

Try this:
function showFunds(p_type){
var hello = p_type;
//console.log(p_type);
var dataString = JSON.stringify({p: hello});
//console.log(dataString);
$.ajax({
type: "POST",
url: "/showFunds",
headers: {'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')},
data: dataString,
cache: false,
contentType: false,
processData: false,
beforeSend : function(){
console.log('logging BS');
console.log(dataString);
},
success: function(data) {
console.log(data);
},
error : function(xhr ,status ,error)
{
console.log(xhr);
},
});
}