DYNDB026: Invalid GSI projection

Field	Value
Code	DYNDB026
Severity	Error

Message

Global Secondary Index '{0}' has invalid projection configuration: {1}

Description

GSI projections must be properly configured to include all necessary attributes. Invalid projection configurations may cause runtime failures or missing data when querying the index.

Example

The following code triggers this diagnostic:

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

    [GsiPartitionKey("status-index", ProjectionType = ProjectionType.Include)]
    [DynamoDbAttribute("status")]
    public string Status { get; set; } = string.Empty;
}

Fix

The corrected version:

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

    [GsiPartitionKey("status-index", ProjectionType = ProjectionType.All)]
    [DynamoDbAttribute("status")]
    public string Status { get; set; } = string.Empty;
}