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Hi I've got a JSON object provided by an ajax request.
Some of the values inside the json appears as null, but I want an empty String instead
My sample of code :
$.post("/profil_process/wall/preview-post.php",param, function (data){
// this does not work
JSON.stringify(data, function(key, value) { return value === "" ? "" : value });
$('#previewWall').html(getPostWall(data.type,data.titre,data.url,data.description,data.media,data.photo_auteur,data.nom_auteur,data.url_auteur,data.date_publication)).fadeIn();
$(".bouton-vertM").show();
$("#wLoader").hide();
},'json');
Any ideas?
323
JSON data has the concept of null and empty arrays and objects.
You can ignore null fields at the class level by using @JsonInclude(Include. NON_NULL) to only include non-null fields, thus excluding any attribute whose value is null. You can also use the same annotation at the field level to instruct Jackson to ignore that field while converting Java object to json if it's null.
Yes, JSON has the null value (which is indeed treated as a value, not as the absence of value), and the empty string, and they are different.
You should definitely include it if there is any need to distinguish between null and undefined since those have two different meanings in Javascript. You can think of null as meaning the property is unknown or meaningless, and undefined as meaning the property doesn't exist.
Your function should be like this:
function (key, value) {
return (value === null) ? "" : value;
}
If the value is null, then it returns an empty string.
63
If you can replace null-s with empty strings on serialized string, do something like this:
data = JSON.parse(JSON.stringify(data).replace(/\:null/gi, "\:\"\""));
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