Question

我有一个相当嵌套的对象结构，我想在dynamodb中扫描。它看起来像这样：

ProductGroup
| id
| customerId
| serviceId
| [assignedAssets] (An Array of Assets objects, each of which has the following)
| | id
| | sku
| | [instances] (an array of Instance objects, each of which has the following)
| | | id
| | | friendlyName

如果我想找到包含ID为的实例的ProductGroup，比如＆＃34; instance10＆＃34;，我可以使用in和=运算符的某种组合利用Dynamo的过滤表达式？如果它有任何区别，请使用Javascript SDK。

Answer 1

如果你也知道资产ID，而不是使用数组，你可以使用地图在服务器端进行过滤。

ProductGroup
| id
| customerId
| serviceId
| {assignedAssets} (A Map of Asset objects, where the key is id)
| | id
| | sku
| | {instances} (A Map of Instance objects, where the key is the id)
| | | id
| | | friendlyName

此处，过滤器表达式为attribute_exists(assignedAssets.#assignedAssetId.instances.#instanceId)

通过深层嵌套值过滤DynamoDB扫描

1 个答案: