FDDB050: Conflicting index Name values

Field	Value
Code	FDDB050
Severity	Error

Message

Index '{0}' has conflicting Name values: '{1}' and '{2}'

Description

When multiple entities define the same DynamoDB index, they must use the same Name property value or only one entity should specify it. All entities must agree on the C# property name for the generated index accessor.

The Name property controls the generated property name on the table class (e.g., table.StatusIndex). If two entities disagree on what this property should be called, the generator cannot resolve the conflict.

Example

The following code triggers this diagnostic:

[DynamoDbTable("shared-table", IsDefault = true)]
public partial class Order
{
    [PartitionKey]
    [DynamoDbAttribute("pk")]
    public string Pk { get; set; } = string.Empty;

    [GsiPartitionKey("gsi1", Name = "StatusIndex")]
    [DynamoDbAttribute("gsi1pk")]
    public string Status { get; set; } = string.Empty;
}

[DynamoDbTable("shared-table")]
public partial class Customer
{
    [PartitionKey]
    [DynamoDbAttribute("pk")]
    public string Pk { get; set; } = string.Empty;

    [GsiPartitionKey("gsi1", Name = "TypeIndex")]
    [DynamoDbAttribute("gsi1pk")]
    public string Type { get; set; } = string.Empty;
}

Fix

The corrected version:

[DynamoDbTable("shared-table", IsDefault = true)]
public partial class Order
{
    [PartitionKey]
    [DynamoDbAttribute("pk")]
    public string Pk { get; set; } = string.Empty;

    [GsiPartitionKey("gsi1", Name = "StatusIndex")]
    [DynamoDbAttribute("gsi1pk")]
    public string Status { get; set; } = string.Empty;
}

[DynamoDbTable("shared-table")]
public partial class Customer
{
    [PartitionKey]
    [DynamoDbAttribute("pk")]
    public string Pk { get; set; } = string.Empty;

    [GsiPartitionKey("gsi1")]
    [DynamoDbAttribute("gsi1pk")]
    public string Type { get; set; } = string.Empty;
}