javascript - AJAX Success function if there is no returned JSON data -
i know simple struggling right. using jquery/ajax retrieve data (json) database. have success function display data. works fine want have alert user if there no returned results.
my php excerpt encodes json:
... while($row = $result->fetch_all()) { $returnresult = $row; } echo json_encode(['result' => $returnresult, 'errors' => $errors]); .... my json data format looks this:
{"result":[["grade 12","studies","john","doe"]],"errors":false} my jquery uses json data , displays in html elements:
function getworkload(){ $.ajax({ type: "post", url: "modules/getworkload.php", datatype: 'json', data: {id:id}, cache: false, }) .success(function(response) { if(!response.errors && response.result) { $.each(response.result, function( index, value) { $("#divwork").append('<li class="list-group-item"><b>'+value[0]+'</b> : '+value[1]+'</li>'); $("#spnname").html('<b>'+value[2]+' '+value[3]+' workload </b>'); }); } else { $.each(response.errors, function( index, value) { $('input[name*='+index+']').addclass('error').after('<div class="errormessage">'+value+'</div>') }); } }); } i have tried replace if(!response.errors && response.result) { following:
if(!response.errors && response.result=null) {if(!response.errors && !response.result) {if(!response.errors && response.result.length < 1) {
your code not correctly parsing json value php file javascript , have parse json before using in javascript
function getworkload(){ $.ajax({ type: "post", url: "modules/getworkload.php", datatype: 'json', data: {id:id}, cache: false, }) .success(function(response) { console.log(response); var res = json.parse(response); console.log(res);/* console json val*/ if(!res.errors && res .result) { $.each(res.result, function( index, value) { $("#divwork").append('<li class="list-group-item"><b>'+value[0]+'</b> : '+value[1]+'</li>'); $("#spnname").html('<b>'+value[2]+' '+value[3]+' workload </b>'); }); } else { $.each(res.errors, function( index, value) { $('input[name*='+index+']').addclass('error').after('<div class="errormessage">'+value+'</div>') }); } }); } 
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