错误“提供给操作的数据不符合要求".尝试将数据添加到indexedDB时 [英] Error "Data provided to an operation does not meet requirements" when trying to add data to indexedDB

问题描述

我不知道这段代码怎么了:

I have no idea what's wrong with this code:

onupgradeneeded = function(){
  z = e.currentTarget.result.createObjectStore(
                       'record', 
                       {keyPath:'id',autoIncrement:true}
  );
  z.createIndex('book', 'book', {unique:false});
  z.createIndex('user', 'user', {unique:false});
}

当我尝试使用以下代码将数据放入对象存储时:

When I try to put data into the object store using the following code:

db.transaction('record',IDBTransaction.READ_WRITE)
    .objectStore('record')
    .add({book:...,user:...})

我收到以下错误消息:

Data provided to an operation does not meet requirements

推荐答案

createIndex需要从setVersion事务(2011年12月之前的规范，当前版本的Chrome和IE支持)中调用，最新规范中的onupgradeneeded回调(目前仅受FF支持，但IE10和更高版本的Chrome将会升级到该回调).

createIndex needs to be called from within a setVersion transaction (spec previous to Dec. 2011, supported by current versions of Chrome and IE) and from a onupgradeneeded callback in the latest spec (currently supported only by FF, but IE10 and later versions of Chrome will upgrade to this).

规范对createIndex的描述列出了为什么看到错误的原因:

The spec description of createIndex lays out why you're seeing the error you're seeing:

createIndex:此方法使用给定的索引创建并返回一个新索引 连接数据库中的名称和参数.如果这个功能是 从VERSION_CHANGE事务回调外部调用， 实现必须抛出InvalidStateError类型的DOMException

createIndex: This method creates and returns a new index with the given name and parameters in the connected database. If this function is called from outside a VERSION_CHANGE transaction callback, the implementation must throw an DOMException of type InvalidStateError exception.

有关setVersion和onupgradeneeded之间差异的更多信息，请查看

For more info on the difference between setVersion and onupgradeneeded, check out this post from IE folks, which explains the changes in code.

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