Dojo增强网格可编辑问题

发布于 2024-10-07 14:43:45 字数 3005 浏览 0 评论 0原文

我在使我的 dojo EnhancedGrid 可编辑时遇到问题。目前，我可以双击网格单元格，并且可以更改值，但是当我再次按 Enter 或尝试离开单元格（即将新值保存到网格中）时，我收到“ItemFileWriteStore 中断言失败”我的萤火虫中出现错误。

下面是我的源代码：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
    <style type="text/css">
        body, html { font-family:helvetica,arial,sans-serif; font-size:90%; }
    </style>
    <link rel="stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/dojo/1.5/dijit/themes/claro/claro.css" />
    <style type="text/css">
        @import "http://ajax.googleapis.com/ajax/libs/dojo/1.5/dojox/grid/resources/Grid.css";
        @import "http://ajax.googleapis.com/ajax/libs/dojo/1.5/dojox/grid/resources/claroGrid.css";
        .dojoxGrid table { margin: 0; }
    </style>
    <script src="http://ajax.googleapis.com/ajax/libs/dojo/1.5/dojo/dojo.xd.js" djConfig="parseOnLoad: true">
    </script>

    <script type="text/javascript">
        dojo.require("dojox.grid.EnhancedGrid");
        dojo.require("dojo.data.ItemFileWriteStore");
        dojo.require("dojox.grid.cells._base");

        dojo.addOnLoad(function() {

            var layoutabc = 
            [[
                {
                    field: "title",
                    name: "TitleofMovie",
                    width: "300px",
                    editable: true
                },
                {
                    field: "year",
                    name: "Year",
                    width: "200px",
                    editable: true
                },
                {
                    field: "producer",
                    name: "Producer",
                    width: "auto",
                    editable: true,
                    type: dojox.grid.cells.Cell
                }
            ]];


            var mystore = new dojo.data.ItemFileWriteStore({
                url: "movies.json"
            });

            // create a new grid:
            var grid = new dojox.grid.EnhancedGrid(
                {
                    query: {},
                    store: mystore,
                    structure: layoutabc
                },
                document.createElement("div")
            );
            dojo.byId("gridDiv").appendChild(grid.domNode);

            grid.startup();
        });
    </script>
</head>

<body class="claro">
    <div id="gridDiv" style="width: 800px; height: 400px;">
    </div>
</body>

这是我的 movie.json 的内容（我知道数据的内容很奇怪）：

{
    items: 
    [
        {
            title: "Africa",
            year: "continent",
            producer: "Katia Lund"
        },
        {
            title: "Kenya",
            year: "country",
            producer: "Christine Jeffs"
        },
        {
            title: "Mombasa",
            year: "city",
            producer: "Ridley Scott"
        }
    ]
}

原文

I'm having problem with making my dojo EnhancedGrid editable.
Currently, I can double click the grid cells and I can change the value, but the moment I press enter again or try to leave the cells (i.e. to save the new value to the grid), I received the "assertion failed in ItemFileWriteStore" error in my firebug.

Below is my source code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
    <style type="text/css">
        body, html { font-family:helvetica,arial,sans-serif; font-size:90%; }
    </style>
    <link rel="stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/dojo/1.5/dijit/themes/claro/claro.css" />
    <style type="text/css">
        @import "http://ajax.googleapis.com/ajax/libs/dojo/1.5/dojox/grid/resources/Grid.css";
        @import "http://ajax.googleapis.com/ajax/libs/dojo/1.5/dojox/grid/resources/claroGrid.css";
        .dojoxGrid table { margin: 0; }
    </style>
    <script src="http://ajax.googleapis.com/ajax/libs/dojo/1.5/dojo/dojo.xd.js" djConfig="parseOnLoad: true">
    </script>

    <script type="text/javascript">
        dojo.require("dojox.grid.EnhancedGrid");
        dojo.require("dojo.data.ItemFileWriteStore");
        dojo.require("dojox.grid.cells._base");

        dojo.addOnLoad(function() {

            var layoutabc = 
            [[
                {
                    field: "title",
                    name: "TitleofMovie",
                    width: "300px",
                    editable: true
                },
                {
                    field: "year",
                    name: "Year",
                    width: "200px",
                    editable: true
                },
                {
                    field: "producer",
                    name: "Producer",
                    width: "auto",
                    editable: true,
                    type: dojox.grid.cells.Cell
                }
            ]];


            var mystore = new dojo.data.ItemFileWriteStore({
                url: "movies.json"
            });

            // create a new grid:
            var grid = new dojox.grid.EnhancedGrid(
                {
                    query: {},
                    store: mystore,
                    structure: layoutabc
                },
                document.createElement("div")
            );
            dojo.byId("gridDiv").appendChild(grid.domNode);

            grid.startup();
        });
    </script>
</head>

<body class="claro">
    <div id="gridDiv" style="width: 800px; height: 400px;">
    </div>
</body>

And this is the content of my movies.json (the content of data is weird, I know):

{
    items: 
    [
        {
            title: "Africa",
            year: "continent",
            producer: "Katia Lund"
        },
        {
            title: "Kenya",
            year: "country",
            producer: "Christine Jeffs"
        },
        {
            title: "Mombasa",
            year: "city",
            producer: "Ridley Scott"
        }
    ]
}

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倥絔 2024-10-14 14:43:45

问题解决了。结果我需要为EnhancedGrid对象定义“plugins”属性，即使它只是一个空对象。一旦定义它就可以正常工作。

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溇涏 2024-10-14 14:43:45

我认为问题在于您的商店不包含任何标识符，因此当网格尝试写入商店时，它没有任何方法知道应该写入哪个条目。

我将首先编辑 movie.json 的响应，可能如下所示：

{
    identifier:"id",
    items: 
    [
        {
            id:1
            title: "Africa",
            year: "continent",
            producer: "Katia Lund"
        },
        {
            id:2
            title: "Kenya",
            year: "country",
            producer: "Christine Jeffs"
        },
        {
            id:3
            title: "Mombasa",
            year: "city",
            producer: "Ridley Scott"
        }
    ]
}

请注意，您不必在布局列表中包含 id 字段，无论如何网格都可以访问它。此外，正如标识符所暗示的那样，它必须是商店中每个项目的唯一值，否则它将无法初始化。

I think the problem is that your store does not contain any identifier so when the grid tries to write to the store, it does not have any way to know which entry it should write to.

I would start by editing the response for movies.json, perhaps like this:

{
    identifier:"id",
    items: 
    [
        {
            id:1
            title: "Africa",
            year: "continent",
            producer: "Katia Lund"
        },
        {
            id:2
            title: "Kenya",
            year: "country",
            producer: "Christine Jeffs"
        },
        {
            id:3
            title: "Mombasa",
            year: "city",
            producer: "Ridley Scott"
        }
    ]
}

Note that you don't have to include the id field in the layout list, it will be accessible to the grid anyway. Also, as identifier implies, it must be a unique value for each item in the store, otherwise it will fail to initialize.

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