DynamoDb update using boto3 Question: I am writing a lambda function to update dynamodb item. But the problem is that when I give { "employee_id": "1", "last_name": "jane", "first_name": "anderson" } It works fine but if you remove the last_name or the first_name the program crashes.I want to make it dynamic like if I provice …
How to get dynamodb to only return certain columns Question: Hello, I have a simple dynamodb table here filled with placeholder values. How would i go about retrieving only sort_number, current_balance and side with a query/scan? I’m using python and boto3, however, just stating what to configure for each of the expressions and parameters is …
DynamoDB Python API: Way to check result of conditional expression? Question: Using DynamoDB, I know I can specify a conditional expression to control updates, for example, using attribute_not_exists() to prevent overwriting an existing item. However, is there any way to check the result of this? I.e. if there was indeed an existing item and the …
Using a ProjectionExpression with reserved words with Boto3 in DynamoDB Question: I’m selecting data from my DynamoDB database using boto3 dynamodb = boto3.resource(‘dynamodb’) table = dynamodb.Table(table_name) response = table.scan(ProjectionExpression=’Id,Name’)[‘Items’] Works fine. Now I also want to retrieve an attribute that is (unfortunately) named with a reserved word – let’s say CONNECTION. response = table.scan(ProjectionExpression=’Id,Name,Connection’)[‘Items’] I …
Update nested map dynamodb Question: I have a dynamodb table with an attribute containing a nested map and I would like to update a specific inventory item that is filtered via a filter expression that results in a single item from this map. How to write an update expression to update the location to "in …
Boto 3 DynamoDB batchWriteItem Invalid attribute value type when specifying types Question: I have a strange problem with Python Boto3 when trying to do a batch_write_item to a DynamoDB table. I am following the documentation and trying to write a singe item. The table is setup correctly and I can run batch-write-item via the AWS …
Use .contains() to retrieve values from DynamoDB Question: I’m new with NoSQL Databases and am stuck with a problem. I just want to get keys from a table in DynamoDB that contains a specific value. I know that for key equals I can use: response = table.query( KeyConditionExpression=Key(‘year’).eq(1992) ) But I can’t use: response = …
How to convert a boto3 Dynamo DB item to a regular dictionary in Python? Question: In Python, when an item is retrieved from Dynamo DB using boto3, a schema like the following is obtained. { “ACTIVE”: { “BOOL”: true }, “CRC”: { “N”: “-1600155180” }, “ID”: { “S”: “bewfv43843b” }, “params”: { “M”: { “customer”: …
"The provided key element does not match the schema" error when getting an item from DynamoDB Question: This is the table partition key setting The table content When I tried to get an item from the table, it prints this error botocore.exceptions.ClientError: An error occurred (ValidationException) when calling the GetItem operation: The provided key element …
How to check if DynamoDB table exists? Question: I’m a new user in boto3 and i’m using DynamoDB. I went through over the DynamoDB api and I couldn’t find any method which tell me if a table is already exists. What is the best approach dealing this issue? Should I try to create a new …
