Boto3 DynamoDB更新项目的列表属性

Question

I have a table like:

{
"pKey": 10001,
"items": [
    {
        "name": "A",
        "value": 100
    },
    {
        "name": "B",
        "value": 100
    }
]
}

I would like to update all value attributes in items list to be 200, items list can have 1 to n objects.

How can I do that using boto3 python dynamoDB low-level client APIs?

Answer 1

I haven't really tested this but this is what I can come up just by reading the docs :

import boto3

ddb = boto3.resource('dynamodb')
table = ddb.Table('your_table')

document = table.get_item(Key={'pKey': 10001})['Item']

for item in document['items']:
    item['value'] = 200

table.put_item(Item=document, ReturnValues='NONE')