DYNDB004: Invalid key format

Field	Value
Code	DYNDB004
Severity	Error

Message

Property '{0}' has invalid key format: {1}

Description

Key format must be a valid pattern for DynamoDB key construction. The source generator validates that key formats follow expected syntax and will produce valid DynamoDB keys at runtime.

Example

The following code triggers this diagnostic:

[DynamoDbTable("Orders")]
public partial class Order
{
    [PartitionKey(Prefix = "ORDER", Separator = "")]
    [DynamoDbAttribute("pk")]
    public string Pk { get; set; } = string.Empty;

    [SortKey]
    [DynamoDbAttribute("sk")]
    public string Sk { get; set; } = string.Empty;
}

Fix

The corrected version:

[DynamoDbTable("Orders")]
public partial class Order
{
    [PartitionKey(Prefix = "ORDER", Separator = "#")]
    [DynamoDbAttribute("pk")]
    public string Pk { get; set; } = string.Empty;

    [SortKey]
    [DynamoDbAttribute("sk")]
    public string Sk { get; set; } = string.Empty;
}