使用Javascript / KendoUI自动完成渲染数据时出错 - 对象#<对象>没有方法'切片' - 如何解决? [英] Error rendering data with Javascript / KendoUI autocomplete - Object #<Object> has no method 'slice' - how to resolve?
问题描述
我正在关注使用带有MVC4 WebAPI的Kendo UI OData和EF 文章。安装KendoUI并确保设置所有引用后,我输入三个字符,并得到以下错误:
I am following the Using Kendo UI with MVC4 WebAPI OData and EF article. After installing KendoUI and making sure all references are set, I type in three characters, and get the following error:
未捕获的TypeError:Object#没有方法'slice'
Uncaught TypeError: Object # has no method 'slice'
问题的根源
通过更新来保存读取:通过调试我发现问题是JS希望解析一个数组 - 在数据中不可用 - 在根目录。在数据层次结构中,它是一个级别。
To save reading through the updates: Through debugging I found that the issue is that JS is expecting to parse an array, where it isn't available in the data - at the root. In the data hierarchy, it's one level in.
原始问题
I清理了kendo.web.min.js,错误发生在第3498行:
I cleaned up kendo.web.min.js and the error is occuring around line 3498:
success: function (n) {
var i = this,
r = i.options;
return i.trigger(wt, {
response: n,
type: "read"
}), n = i.reader.parse(n), i._handleCustomErrors(n) ? (i._dequeueRequest(), t) : (i._pristine = et(n) ? e.extend(!0, {}, n) : n.slice ? n.slice(0) : n, i._total = i.reader.total(n), i._aggregate && r.serverAggregates && (i._aggregateResult = i.reader.aggregates(n)), n = i._readData(n), i._pristineData = n.slice(0), i._data = i._observe(n), i._addRange(i._data), i._process(i._data), i._dequeueRequest(), t)
Kendo UI小部件加载得很好以及css:
The Kendo UI widgets are loading just fine as well as the css:
<link href="~/Content/kendo/kendo.common.min.css" rel="stylesheet" />
<link href="~/Content/kendo/kendo.default.min.css" rel="stylesheet" />
<script src="~/Scripts/jquery-1.9.1.min.js"></script>
<script src="~/Scripts/kendo/kendo.web.min.js"></script>
<script src="~/Scripts/kendo/kendo.aspnetmvc.min.js"></script>
<script src="~/Scripts/appScripts.js"></script>
我看到使用Razor MVC助手/扩展程序时出现同样的错误:
And I am seeing the same error both with using the Razor MVC helper/extension:
@(Html.Kendo().AutoComplete()
.Name("userAutoComplete") // specifies the "id" attribute of the widget
.DataTextField("USERNAME")
.DataSource(source =>
{
source.Read(read =>
{
read.Url("/api/user");
})
.ServerFiltering(true); // if true, the DataSource will not filter the data on the client
}
)
)
直接通过JS:
/// <reference path="kendo/kendo.aspnetmvc.min.js" />
/// <reference path="kendo/kendo.core.min.js" />
/// <reference path="kendo/kendo.autocomplete.min.js" />
/// <reference path="kendo/kendo.web.min.js" />
$(document).ready(function () {
// load up KendoUI
// gets data from /api/user
var dataSource = new kendo.data.DataSource({
transport: {
read: {
url: "/api/user"
}
}
});
$("#userSearch").kendoAutoComplete({
dataSource: dataSource,
dataTextField: "USERNAME",
minLength: 3
});
$("#userSearch").on('input', function () {
console.log($("#userSearch").val());
});
}); // $(document).ready()
我确信这很简单,我可以失踪。我已尝试使用网络和所有js文件。
I'm sure this is something simple that I may be missing. I have tried both with the web and all js files.
任何帮助都将受到赞赏。
Any assistance would be appreciated.
- 更新 -
该内容中唯一缺少的真正html是< input id =userAutoComplete/ >
The only real html missing from that content is the <input id="userAutoComplete" />
我创建了一个全新的解决方案和一个非常简单的视图,基于其中一个获取JSON数据的Kendo UI示例a href =http://api.geonames.org =noreferrer> http://api.geonames.org ,并收到同样的错误。
I created a brand new solution and a very simple view, based on one of the Kendo UI examples that gets JSON data from http://api.geonames.org, and getting the same error.
我认为使用最新的JS库( // ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js
可能导致问题所以我尝试了1.7 lib。同样的问题:
I thought that using the newest JS library (//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js
may have been causing a problem so I tried the 1.7 lib. Same issue:
@using Kendo.Mvc.UI
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
<link rel="stylesheet" href="@Url.Content("~/Content/kendo.common.min.css")">
<link rel="stylesheet" href="@Url.Content("~/Content/kendo.default.min.css")">
<link rel="stylesheet" href="@Url.Content("~/Content/kendo.dataviz.min.css")">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script src="@Url.Content("~/Scripts/kendo.web.min.js")"></script>
<script src="@Url.Content("~/Scripts/kendo.aspnetmvc.min.js")"></script>
<script src="@Url.Content("~/Scripts/kendo.dataviz.min.js")"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#autoComplete").kendoAutoComplete({
minLength: 6,
dataTextField: "title",
filter: "contains",
dataSource: new kendo.data.DataSource({
transport: {
read: {
url: "http://api.geonames.org/wikipediaSearchJSON",
data: {
q: function () {
return $("#autoComplete").data("kendoAutoComplete").value();
},
maxRows: 10,
username: "demo"
}
}
},
schema: {
data: "geonames"
}
}),
change: function () {
this.dataSource.read();
}
})
});
</script>
</head>
<body>
<div>
<input id="autoComplete"/>
</div>
</body>
</html>
- 更新 -
使用上面的代码,我回去再试一次 - 它工作正常。经过几次尝试后,我遇到了同样的问题。这是由于有效的JSON数据更改为以下内容:
Using the code above, I went back and tried it again - it worked fine. After trying several more times, I experienced the same issue. This was due to the valid JSON data changing to the following:
{"status":{"message":"the daily limit of 30000 credits for demo has been exceeded. Please use an application specific account. Do not use the demo account for your application.","value":18}}
...这让我看看来自我的API的数据格式(在Fiddler中查看:
... which lead me to look at the formatting of the data coming from my API (looking at it in Fiddler:
而不是:
JSON
--- {... data ...
JSON ---{... data...
它是
JSON
---$id=1
---$values
------{}
---------$id=2
---------CREATEDATETIME...
---------EMAIL=email@email.com
---------GROUPS
------------$id=...
------------$id=...
---------USERNAME=someusername
------{}
---------$id=4
.
.
.
因此错误是由于数组无法在预期的位置访问 - 而不是根,它是一个级别深度。
So the error is caused by the array not being accessible where the it's expected - instead of the root, it's one level deep.
如何将数据绑定到一级深度而不是JSON对象的根?
How do I get data binding to the one-level-deep rather than the root of the JSON object?
谢谢。
推荐答案
解决方法是通过描述结果格式来遍历数据层次结构。
The solution for this was to traverse the data hierarchy by describing the result format.
由于数组包含在$ values中,因此我使用了以下数据源/模式定义:
Since the array is contained in $values, I used the following data source/schema definition:
// gets data from /api/user
var dataSource = new kendo.data.DataSource({
transport: {
read: {
url: "/api/user"
}
},
schema: { // describe the result format
data: function(data) { // the data which the data source will be bound to is in the values field
console.log(data.$values);
return data.$values;
}
}
});
一件好事就是能够在Razor助手中添加数据模式类型 - 。
One thing that would be nice is to be able to add a data schema type in the Razor helper - which doesn't seem to be supported at this time.
因此,以下仍然不起作用:
Thus, the following still would not work:
@(Html.Kendo().AutoComplete()
.Name("userAutoComplete") // specifies the "id" attribute of the widget
.Filter("startswith")
.Placeholder("Type user name...")
.DataTextField("USERNAME")
.DataSource(source =>
{
source:
source.Read(read =>
{
read.Url("/api/user");
})
.ServerFiltering(true); // if true, the DataSource will not filter the data on the client
}
)
)
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