无法使用我的SAM应用程序访问DynamoDB

Question

我试图从我的SAM应用程序本地连接到DynamoDB。我能够启动Dynamodb服务器，并能够通过我的python文件连接它，引用此https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GettingStarted.Python.01.html

导入json导入boto3从boto3.dynamodb.conditions导入密钥从pprint导入pprint

从botocore.exceptions导入ClientError

def put_movie（标题、年份、情节、评级、dynamodb=None）：如果不是dynamodb:dynamodb=boto3.resource（'dynamodb'，endpoint_url=”http://localhost:8000")

table = dynamodb.Table('Movies')
response = table.put_item(
   Item={
        'year': year,
        'title': title,
        'info': {
            'plot': plot,
            'rating': rating
        }
    }
)
return response

def fun1（）：movie_resp=put_movie（“大新片”，2015，“什么都没发生”，0）print（“put movie successed:”）pprint（movie_resp）

def lambda_处理程序（事件、上下文）：“示例纯lambda函数

Parameters
----------
event: dict, required
    API Gateway Lambda Proxy Input Format

    Event doc: https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html#api-gateway-simple-proxy-for-lambda-input-format

context: object, required
    Lambda Context runtime methods and attributes

    Context doc: https://docs.aws.amazon.com/lambda/latest/dg/python-context-object.html

Returns
------
API Gateway Lambda Proxy Output Format: dict

    Return doc: https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html
"""

# try:
#     ip = requests.get("http://checkip.amazonaws.com/")
# except requests.RequestException as e:
#     # Send some context about this error to Lambda Logs
#     print(e)

#     raise e
fun1()

s1 = "Hello there"
return {
    "statusCode": 200,
    "body": json.dumps({
        #"message": "hello world",
        "message" : s1
        # "location": ip.text.replace("\n", "")
    }),
}

    }

我得到这个错误：在这里输入图像描述

这是我的YAML文件：在此处输入图像描述在此处输入图像描述

Answer 1

如果已经创建了DynamoDB表并使其运行，则不需要使用put\u movie函数第3行中的endpoint参数。因此，该函数应如下所示：

import boto3

def put_movie(title, year, plot, rating, dynamodb = None):
    if not dynamodb:
        dynamodb = boto3.resource('dynamodb')
    
    table = dynamodb.Table('Movies')

    response = table.put_item(
        Item = {
            'year': year,
            'title': title,
            'info': {
                'plot': plot,
                'rating': rating
                }
            }
        )
    return response

参考文件：https://boto3.amazonaws.com/v1/documentation/api/latest/guide/dynamodb.html#using-现有表格

Answer 2

如果使用本地DynamoDB，则需要在创建资源时设置终结点URL。

dynamodb = boto3.resource('dynamodb', endpoint_url="http://localhost:8000")