索引的数据库游标范围在多个属性上 [英] Indexed DB cursor ranges on multiple properties

问题描述

我在indexeddb对象库上有两个属性的复合索引，并希望根据这两个属性的范围来检索游标。

I have a composite index of two properties on an indexeddb objectstore and wish to retrieve a cursor based on the range of both of these properties.

这是一个示例对象在商店中：

Here's an example object in the store :

{species: 'Oak',xcoord: 123456, ycoord: 654321}

和索引：

treeStore.createIndex("treelocation", ["xcoord","ycoord"], { unique: false });

创建索引是成功的，我可以在Chrome开发者工具中看到它，但是现在我想喜欢在x和y坐标上打开一个带有键范围的光标（这将是地图的范围）。

The index creation is succesful and I can see it in the Chrome developer tools, however now I'd like to open a cursor with a keyrange on both the x and y co-ordinates (which will be the extent of a map).

在线搜索我看不到怎么做，打开带有一系列键范围的索引似乎不起作用。

Searching online I can't see how to do this, and opening an index with an array of key ranges doesn't seem to work.

推荐答案

我被告知解决方案确实是 IDBKeyRange.bound（[lowX，lowY]，[highX，highY]）。

I have been told the solution is indeed IDBKeyRange.bound([lowX,lowY],[highX,highY]).

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