javascript - 使用 JayData 进行基本数据存储

Question

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 应用程序在客户端存储复杂的数据(主要是一对多关系)。

我的模型看起来像这样(抱歉，如果名称不是很明确):

我尝试用 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 }
});

编辑

如何填充所有表格？首先，我试过:

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

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

但是，如果我想将Chapters 和Checks 添加到我的Test 中怎么办？

谢谢

Answer 1

好吧，我终于自己找到了:

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();
});

没那么难:)