"Attempt to assign property "weight" on null", exception: "Error",…} - laravel

Question

Good Evening... New in Laravel and trying to develop web app for home business.
I am trying to Add new data on one table (buffaloinspectiondata) and update data on another table (buffalodata) using one Ajax.
For new data its working fine but for update in another table its giving error
Attempt to assign property "weight" on null
Controller File
public function addbuffaloinspectiondata(Request $req)
{
// add new data in buffaloinspection table for Buffalo ID
$newdata = new buffaloinspectiondata;
$newdata->buffaloID = $req->buffaloID;
$newdata->inspectiondate = $req->inspectiondate;
$newdata->weight = $req->weight;
$newdata->height = $req->height;
$newdata->pregnant = $req->pregnantstatus;
$newdata->health = $req->healthstatus;
$newdata->weeklytika = $req->weeklytika;
$newdata->monthlytika = $req->monthlytika;
$newdata->inspection = $req->inspection;
$newdata->inspectionby = $req->inspectionby;
$newdata->inspectionnote = $req->inspectionnote;
// Update data in buffalodata table for Buffalo ID
$updatedata = buffalodata::find($req->buffaloID);
$updatedata->weight = $req->get('weight');
$updatedata->height = $req->get('height');
$updatedata->pregnant = $req->get('pregnantstatus');
$updatedata->health = $req->get('healthstatus');
$newdata->save ();
$updatedata->save ();
return response()->json( $newdata,$updatedata );
}
AJAX Code =
$.ajaxSetup({
headers: {'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')}
});
$(document).on('click', '#footer_addnewinspectiondata_button', function() {
$.ajax({
type: 'post',
url: '/addbuffaloinspectiondata',
data: {
'_token' : $('input[name=_token]').val(),
'id' : $('#fid').val(),
'buffaloID' : $('#buffaloID').val(),
'inspectiondate' : $('#inspectiondate').val(),
'pregnantstatus' : $('#pregnantstatus').val(),
'healthstatus' : $('#healthstatus').val(),
'weight' : $('#weight').val(),
'height' : $('#height').val(),
'weeklytika' : $('#weeklytika').val(),
'monthlytika' : $('#monthlytika').val(),
'inspection' : $('#inspection').val(),
'inspectionby' : $('#inspectionby').val(),
'inspectionnote' : $('#inspectionnote').val(),
},
success: function(data) {
console.log (data)
}
});
});
Web.php
Route:: post('/addbuffaloinspectiondata',
[viewbuffaloController::class,'addbuffaloinspectiondata']);
Did i miss something..... Thanks in Advance

Answer 1

you need to store each element because if you don't want to update one column the value is null
so try the following code is the example
$updatedata = buffalodata::find($req->buffaloID);
$weight = $request->weight;
if($weight != null)
$updatedata->weight = $weight;
$updatedata->save ();
and do this condition for each column
hopefully this help you