Jaydata indexedDb数据库创建问题 | indexedDb数据库创建问题

本文介绍了Jaydata indexedDb数据库创建问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在jayData上遇到此问题:我尝试创建这个简单的数据库:

I have this problem on jayData:I try to create this simple database:

var x=$data.Entity.extend("Person",
{
  ID: {type: "int", key:true, required: true},
  Name: {type: "string", required: true}
});

$data.EntityContext.extend("PersonDatabase",
{
  People: {type: $data.EntitySet, elementType: Person}
});

var DB1=new PersonDatabase({
  provider: 'webSql',
  databaseName:'DB1',
});

哪个效果很好.但是当我只是将数据库类型切换为indexxedDb时，它什么也没做.

Which works perfectly. But when I simply switch the database type to indexxedDb, it doesn't do anything.

var x=$data.Entity.extend("Person",
{
  ID: {type: "int", key:true, required: true},
  Name: {type: "string", required: true}
});

$data.EntityContext.extend("PersonDatabase",
{
  People: {type: $data.EntitySet, elementType: Person}
});

var DB1=new PersonDatabase({
  provider: 'indexedDb',
  databaseName:'DB1',
  version: 1
});

有什么想法吗?

推荐答案

此代码中只有一件事需要解决:ID字段应计算，而不是必填 >.更改后，JayData将为您自动生成ID.

There is only one thing to fix in this code: the ID field should be computed instead of required. Once you change it, JayData will autogenerate the ID for you.

var x=$data.Entity.extend("Person",
{
    Id: {type: "int", key:true, computed: true},
  Name: {type: "string", required: true}
});

$data.EntityContext.extend("PersonDatabase",
{
  People: {type: $data.EntitySet, elementType: Person}
});

var DB1=new PersonDatabase({ provider: 'indexedDb', databaseName:'DB1', version: 1 });

DB1.onReady(function() {
    DB1.People.add({ Name: 'Jay Data'});
    DB1.saveChanges();
});

这可以解决您的问题吗?

Does this fix your issue?

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