amazon-dynamodb - DynamoDB 有序列表

Question

我正在尝试将列表存储为 DynamoDB 属性，但我需要能够检索列表顺序。目前，我想出的唯一解决方案是通过将键附加到值并将完整值转换为字符串，然后将其存储为列表来创建自定义哈希映射。

例如。 key = position1, value = value1, 存储在数据库中的字符串 = "position1#value1"

要使用该列表，我需要过滤、组织、子字符串并重新转换为原始类型。这似乎有很长的路要走，但目前这是我能想到的唯一解决方案。

有人有更好的解决方案或想法吗？

Answer 1

List type在新添加的文档类型中应该会有所帮助。

Document Data Types

DynamoDB supports List and Map data types, which can be nested to represent complex data structures.

• A List type contains an ordered collection of values.
• A Map type contains an unordered collection of name-value pairs.

Lists and maps are ideal for storing JSON documents. The List data type is similar to a JSON array, and the Map data type is similar to a JSON object. There are no restrictions on the data types that can be stored in List or Map elements, and the elements do not have to be of the same type.