【发布时间】：2018-06-06 21:46:17
【问题描述】：
我试图展示从 API 获得的价值。我正在尝试在模板中显示 question_section 名称。我多次获得这些值意味着 json 中的 Array 对象。所以有一次我得到了 question_section 的价值，比如“A: ABC Xyz”，但接下来的 5 次 null 价值又一次" B: DEF pqr" 和 5 次 null 值。
所以当我试图在我的模板中显示它时，会得到 undefined 或 null。 我使用 JSON.stringfy(value1.question_section) 然后为空，因为所有值都是空的。在这里我注意到它正在打印最后一个索引（第 4 个索引）的值，但它应该打印零索引。
我的 Vue js 代码
$.each(this.questionPaperAll, function( key, value) {
$.each(value.questions, function( key1, value1) {
if( JSON.stringify( value1.question_section) )
{
title = "<div style='font-weight: bold;padding-bottom: 10px'>"
+ JSON.stringify( value1.question_section) +" " +
value1.section_marks + "</div>\n" +
"<div style='font-weight: bold;padding-bottom: 10px'>" +
s_no + ") " + value1.question_type_name[0].name + "
</div>\n"
}
});
});
我的 API Json 响应 :: 我无法在此处显示完整响应，这只是我遇到问题的示例..
[ {
"question_type_name": "4",
"questions": [
{
"question_ref_id": "DndoURx54fj7HaSF",
"question_section": "A : Attempt All question.",
"section_marks": "10",
"question_name": "economics Question 122",
},
{
"question_ref_id": "8wFqcPBVruJSvYKv",
"question_section": "",
"section_marks": "10",
"question_name": "economics Question 127",
},
{
"question_ref_id": "VU4xhxMYO5pdGkNM",
"question_section": "",
"section_marks": "10",
"question_name": "economics Question 128",
},
{
"question_ref_id": "VU4xhxMYO5pdGkNM",
"question_section": "",
"section_marks": "10",
"question_name": "economics Question 128",
},
{
"question_ref_id": "VU4xhxMYO5pdGkNM",
"question_section": "",
"section_marks": "10",
"question_name": "economics Question 128",
}
]
},
{
"question_type_name": "1",
"questions": [
{
"question_ref_id": "e0NGIyFmsQ5EEKiX",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 333",
},
{
"question_ref_id": "e0NGIyFmsQ5EEKiX",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 333",
},
{
"question_ref_id": "e0NGIyFmsQ5EEKiX",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 333",
},
{
"question_ref_id": "e0NGIyFmsQ5EEKiX",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 333",
},
{
"question_ref_id": "e0NGIyFmsQ5EEKiX",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 333",
},
]
},
{
"question_type_name": "3",
"questions": [
{
"question_ref_id": "oALoJ2nCzQm2EBbA",
"question_section": "B : Attempt Only 5 Question from each Question.",
"section_marks": "20",
"question_name": "economics Question 11w",
"marks": "1",
},
{
"question_ref_id": "YUrzwnrW2o0nXMD8",
"question_section": "",
"section_marks": "20",
"question_name": "economics Question 12l",
"marks": "1",
},
{
"question_ref_id": "YUrzwnrW2o0nXMD8",
"question_section": "",
"section_marks": "20",
"question_name": "economics Question 12l",
"marks": "1",
},
{
"question_ref_id": "YUrzwnrW2o0nXMD8",
"question_section": "",
"section_marks": "20",
"question_name": "economics Question 12l",
"marks": "1",
},
{
"question_ref_id": "YUrzwnrW2o0nXMD8",
"question_section": "",
"section_marks": "20",
"question_name": "economics Question 12l",
"marks": "1",
},
{
"question_ref_id": "YUrzwnrW2o0nXMD8",
"question_section": "",
"section_marks": "20",
"question_name": "economics Question 12l",
"marks": "1",
}
]
},
{
"question_type_name": "2",
"questions": [
{
"question_ref_id": "KztHaRUnRCLZwx8U",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 5",
"marks": "1",
},
{
"question_ref_id": "KztHaRUnRCLZwx8U",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 5",
"marks": "1",
},
{
"question_ref_id": "KztHaRUnRCLZwx8U",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 5",
"marks": "1",
},
{
"question_ref_id": "KztHaRUnRCLZwx8U",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 5",
"marks": "1",
},
{
"question_ref_id": "KztHaRUnRCLZwx8U",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 5",
"marks": "1",
},
{
"question_ref_id": "KztHaRUnRCLZwx8U",
"question_section": "",
"section_marks": null,
"question_name": "economics Question 5",
"marks": "1",
},
]
}]
这是理解问题的示例响应。您可以看到该数组的值。其中数组 questions 具有键 question_section ，该键值第一次出现某个字符串，但在新部分未出现之前全部为空。所以我想只显示那些 question_section 的值有和休息避免意味着不显示。为此，我使用了 if 条件，但它现在可以工作了。为什么我不知道？所以请更正可能的代码。还要解释发生了什么问题。
我还想告诉你，当我尝试检查 questions 数组的哪个索引正在打印时。我看到索引 4 是第一个数组的最后一个索引。为什么最后打印。
questionPaperAll 是我从服务器获取时保存 API 响应的数组。
【问题讨论】：
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它的输出将显示在 ck-editor 上。