JSON url undefined

Question

我对此网址有疑问http://surfujpametno.roditelji.me/category/tv-emisija/?json=get_all_posts 我收到此错误： 未捕获的TypeError：无法读取未定义的属性“url”

但我对此网址http://surfujpametno.roditelji.me/category/vijesti/?json=get_all_posts

没有问题

这是我的代码：

function json_parser_fun() {

    var url = 'http://surfujpametno.roditelji.me/category/tv-emisija/?json=get_all_posts';
        $.ajax({
            url: url,
            type: 'GET',
            dataType: 'jsonp',
                success: function(json){
                    console.debug(json);
                    var JSONstring = JSON.stringify(json);
                    var myData = JSON.parse(JSONstring);

                    var postovi = "";

                    var brojac = 1;
                    var ima = 0;

                    for(var i=0;i<myData.posts.length;i++)
                    {
                        if(brojac %2 ==0)
                            postovi = postovi + "<a onClick=moja_funkcija('"+ myData.posts[i].url +"') class='menu_item' href='#'><div class='menu_div"+2+"'><div class='image_div'><img style='height:40px;width:40px;' src='"+ myData.posts[i].attachments[0].url +"'/></div><div class='title_div'><p style='font-size:9px'>" + myData.posts[i].date + "</p><p style='font-size:12px'>" + myData.posts[i].title + "</p></div></div></a>";
                        else
                            postovi = postovi + "<a onClick=moja_funkcija('"+ myData.posts[i].url +"') class='menu_item' href='#'><div class='menu_div'><div class='image_div'><img style='height:40px;width:40px;' src='"+ myData.posts[i].attachments[0].url +"'/></div><div class='title_div'><p style='font-size:9px'>" + myData.posts[i].date + "</p><p style='font-size:12px'>" + myData.posts[i].title + "</p></div></div></a>";
                        brojac++;
                    }

                    document.getElementById("container").innerHTML = postovi;
                },
                error: function(e) {
                    console.log(e.message);
                }
        });
}

Answer 1

在JSON响应中，有时附件是空的。

示例＃1：空附件替换为urlNo_attachments_url

function json_parser_fun() {

    var url = 'http://surfujpametno.roditelji.me/category/tv-emisija/?json=get_all_posts';
    var urlNo_attachments_url = 'http://animatika.ru/netcat_files/userfiles/3/facepalm.jpg';
        $.ajax({
            url: url,
            type: 'GET',
            dataType: 'jsonp',
                success: function(json){
                    console.debug(json);
                    var JSONstring = JSON.stringify(json);
                    var myData = JSON.parse(JSONstring);

                    var postovi = "";

                    var brojac = 1;
                    var ima = 0;

                    for(var i=0;i<myData.posts.length;i++)
                    {
                        if(brojac %2 ==0)
                            postovi = postovi + "<a onClick=moja_funkcija('"+ myData.posts[i].url +"') class='menu_item' href='#'><div class='menu_div"+2+"'><div class='image_div'><img style='height:40px;width:40px;' src='"+ (myData.posts[i].attachments && myData.posts[i].attachments[0]?myData.posts[i].attachments[0].url:urlNo_attachments_url) +"'/></div><div class='title_div'><p style='font-size:9px'>" + myData.posts[i].date + "</p><p style='font-size:12px'>" + myData.posts[i].title + "</p></div></div></a>";
                        else
                            postovi = postovi + "<a onClick=moja_funkcija('"+ myData.posts[i].url +"') class='menu_item' href='#'><div class='menu_div'><div class='image_div'><img style='height:40px;width:40px;' src='"+ (myData.posts[i].attachments && myData.posts[i].attachments[0]?myData.posts[i].attachments[0].url:urlNo_attachments_url) +"'/></div><div class='title_div'><p style='font-size:9px'>" + myData.posts[i].date + "</p><p style='font-size:12px'>" + myData.posts[i].title + "</p></div></div></a>";
                        brojac++;
                    }

                    document.getElementById("container").innerHTML = postovi;
                },
                error: function(e) {
                    console.log(e.message);
                }
        });
}

示例＃2：如果是空附件 - 发布删除

function json_parser_fun() {

    var url = 'http://surfujpametno.roditelji.me/category/tv-emisija/?json=get_all_posts';
        $.ajax({
            url: url,
            type: 'GET',
            dataType: 'jsonp',
                success: function(json){
                    console.debug(json);
                    var JSONstring = JSON.stringify(json);
                    var myData = JSON.parse(JSONstring);

                    var postovi = "";

                    var brojac = 1;
                    var ima = 0;

                    for(var i=0;i<myData.posts.length;i++)
                    {
            if(myData.posts[i].attachments && myData.posts[i].attachments[0]){
                        if(brojac %2 ==0)
                            postovi = postovi + "<a onClick=moja_funkcija('"+ myData.posts[i].url +"') class='menu_item' href='#'><div class='menu_div"+2+"'><div class='image_div'><img style='height:40px;width:40px;' src='"+ myData.posts[i].attachments[0].url +"'/></div><div class='title_div'><p style='font-size:9px'>" + myData.posts[i].date + "</p><p style='font-size:12px'>" + myData.posts[i].title + "</p></div></div></a>";
                        else
                            postovi = postovi + "<a onClick=moja_funkcija('"+ myData.posts[i].url +"') class='menu_item' href='#'><div class='menu_div'><div class='image_div'><img style='height:40px;width:40px;' src='"+ myData.posts[i].attachments[0].url +"'/></div><div class='title_div'><p style='font-size:9px'>" + myData.posts[i].date + "</p><p style='font-size:12px'>" + myData.posts[i].title + "</p></div></div></a>";
                        brojac++;
            }
                    }
                    document.getElementById("container").innerHTML = postovi;
                },
                error: function(e) {
                    console.log(e.message);
                }
        });
}