使用JayData进行基本数据存储

时间:2013-03-13 14:52:25

标签: javascript html5 web jaydata

我尝试实现我的第一个基于JayData的应用程序。我需要我的HTML5 / JavaScript应用程序来存储客户端的复杂数据(主要是一对多关系)。

我的模型看起来像这样(对不起,如果名字不是很清楚):

enter image description here

我试图用JayData翻译它,如果我错了,请纠正我:

$data.Entity.extend("Test", {
    Id: { type: "int", key: true, computed: true },
    Name: { type: "string", required: true, maxLength: 200 },
    Chapters: { type: Array, elementType: "Chapter", inverseProperty: "Test" }
});

$data.Entity.extend("Chapter", {
    Id: { type: "int", key: true, computed: true },
    Name: { type: String, required: true, maxLength: 200 },
    Test: {type: "Test", inverseProperty: "Chapters" },
    Checks: { type: Array, elementType: "Check", inverseProperty: "Chapter" }
});

$data.Entity.extend("Check", {
    Id: { type: "int", key: true, computed: true },
    Name: { type: String, required: true, maxLength: 200 },
    Status: { type: "int", required: true },
    Chapter: { type: Chapter, inverseProperty: "Checks" }
});

$data.EntityContext.extend("CheckDb", {
    Tests: { type: $data.EntitySet, elementType: Test },
    Chapters: { type: $data.EntitySet, elementType: Chapter },
    Checks: { type: $data.EntitySet, elementType: Check }
});

修改

如何填写所有表格?首先,我试过了:

var myDB = new CheckDb({ 
    name: 'local', databaseName: 'CheckDatabase'
});

myDB.onReady(function() {
    myDB.Tests.add({
        Name: "Test 1"
    });
    myDB.saveChanges();
});

但是,如果我要将ChaptersChecks添加到Test该怎么办?

由于

2 个答案:

答案 0 :(得分:2)

好的,我终于找到了它自己:

myDB.onReady(function() {
    var check = new Check({Name: "Check 1", Status: 1});
    var chapter = new Chapter({Name: "Chapter 1"});
    chapter.Checks = new Array();
    chapter.Checks.push(check);

    var myTest = myDB.Tests.add({
        Name: "Test 1",
        Chapters: [chapter]
    });
    myDB.saveChanges();
});

这并不难:)

答案 1 :(得分:0)

您的代码没问题。我已经用你的代码创建了一个jsfiddle,它可以在不改变单个字符的情况下工作。 包括jQuery 1.8+和然后 http://include.jaydata.org/jaydata.js