我想使用 DynamoDB Local 和 SAM CLI 在本地环境中测试 AWS Lambda。我创建了一个简单的用户数据库表(id,名称),我正在尝试获取数据。
我运行“sam local start-api --env-vars test/env.json”。当我访问“ http://localhost:3000/users/1 ”时,出现错误。错误信息如下。我无法理解此错误消息的含义。如何修复此错误?
{
"errorMessage": "InvalidParameter: 1 validation error(s) found.\n- minimum field size of 3, GetItemInput.TableName.\n",
"errorType": "ErrInvalidParams"
}
这是我的代码。
func handler(request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
// Environment variables
endpoint := os.Getenv("DYNAMODB_ENDPOINT")
tableName := os.Getenv("DYNAMODB_TABLE_NAME")
// Request
id, _ := request.PathParameters["id"]
// DynamoDB
sess := session.Must(session.NewSession())
config := aws.NewConfig().WithRegion("ap-northeast-1")
if len(endpoint) > 0 {
config = config.WithEndpoint(endpoint)
}
db := dynamodb.New(sess, config)
response, err := db.GetItem(&dynamodb.GetItemInput{
TableName: aws.String(tableName),
Key: map[string]*dynamodb.AttributeValue{
"Id": {
N: aws.String(string(id)),
},
},
AttributesToGet: []*string{
aws.String("Id"),
aws.String("Name"),
},
ConsistentRead: aws.Bool(true),
ReturnConsumedCapacity: aws.String("NONE"),
})
if err != nil {
return events.APIGatewayProxyResponse{}, err
}
user := User{}
err = dynamodbattribute.Unmarshal(&dynamodb.AttributeValue{M: response.Item}, &user)
if err != nil {
return events.APIGatewayProxyResponse{}, err
}
// Json
bytes, err := json.Marshal(user)
if err != nil {
return events.APIGatewayProxyResponse{}, err
}
return events.APIGatewayProxyResponse{
Body: string(bytes),
StatusCode: 200,
}, nil
}