DYNDB025: Potential data loss

Field	Value
Code	DYNDB025
Severity	Warning

Message

Property '{0}' configuration may cause data loss during serialization: {1}

Description

Certain property configurations may result in data loss during DynamoDB serialization. This occurs when a type conversion loses precision or when a format truncates information that cannot be recovered on deserialization.

Example

The following code triggers this diagnostic:

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

    [DynamoDbAttribute("eventDate", Format = "yyyy-MM-dd")]
    public DateTime EventTimestamp { get; set; }
}

Fix

The corrected version:

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

    [DynamoDbAttribute("eventTimestamp")]
    public DateTime EventTimestamp { get; set; }

    [DynamoDbAttribute("eventDate", Format = "yyyy-MM-dd")]
    public DateOnly EventDate { get; set; }
}