Error: dynamodb query is null

Answered by Rafal Wilinski
What's Causing This Error
This error message indicates that the query operation has failed because the TableName
property is not set or specified correctly. The TableName
property is used to specify the table's name from which the item(s) are to be retrieved. If the property is not set or is specified incorrectly, DynamoDB will not know which table to query, hence the error.
Solution: Here's How To Resolve It
To solve this error, provide a valid TableName
property. The TableName should be the name of an existing table in your DynamoDB account.
Here is an example of how to perform a query operation with a valid TableName
:
import boto3 # Instantiate a client dynamodb = boto3.client('dynamodb', region_name='us-west-2') # Define the parameters table_name = "my_table" key_condition_expression = "Id = :value" expression_attribute_values = { ":value": {"N": "1"} } # Perform the operation response = dynamodb.query( TableName=table_name, KeyConditionExpression=key_condition_expression, ExpressionAttributeValues=expression_attribute_value ) print(response)
It is also essential to check that the table name is spelt correctly and that the table exists in your DynamoDB account; otherwise, the query will fail. Finally, it's also essential to check that the IAM user or role used to call the function has the necessary permissions to perform the query on the table.
Other Common DynamoDB Errors (with Solutions)
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- aws.dynamodb.converter.unmarshall not working
- DynamoDB Update Not Working
- DynamoDB ConditionalCheckFailedException
- KMS Key Access Denied Error DynamoDB
- DynamoDB Expression Not Null
- dynamodb cannot convert undefined to object
- DynamoDB Key element does not match the schema
- DynamoDB Is Unsupported It Cannot Be Instantiated
- DynamoDB Local Docker Not Working
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- dynamodb does not accept empty set
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