如何在DynamoDB中查找按日期属性排序的实体

import boto3

# 创建DynamoDB客户端
dynamodb = boto3.client('dynamodb')

# 定义表名和日期属性名
table_name = 'your_table_name'
date_attribute = 'date'

# 定义查询条件和排序顺序
key_condition_expression = '#date_attr > :start_date'
expression_attribute_names = {'#date_attr': date_attribute}
expression_attribute_values = {':start_date': {'N': '20220101'}}
scan_index_forward = False  # 降序排序

# 执行查询操作
response = dynamodb.query(
    TableName=table_name,
    KeyConditionExpression=key_condition_expression,
    ExpressionAttributeNames=expression_attribute_names,
    ExpressionAttributeValues=expression_attribute_values,
    ScanIndexForward=scan_index_forward
)

# 处理返回结果
items = response['Items']
for item in items:
    # 处理每个实体的逻辑
    print(item)