DKNet.AspCore.Idempotency.NpgsqlStore 10.0.35

.NET 10.0

dotnet add package DKNet.AspCore.Idempotency.NpgsqlStore --version 10.0.35

NuGet\Install-Package DKNet.AspCore.Idempotency.NpgsqlStore -Version 10.0.35

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="DKNet.AspCore.Idempotency.NpgsqlStore" Version="10.0.35" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="DKNet.AspCore.Idempotency.NpgsqlStore" Version="10.0.35" />
                    

                            Directory.Packages.props

<PackageReference Include="DKNet.AspCore.Idempotency.NpgsqlStore" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add DKNet.AspCore.Idempotency.NpgsqlStore --version 10.0.35

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: DKNet.AspCore.Idempotency.NpgsqlStore, 10.0.35"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

#:package DKNet.AspCore.Idempotency.NpgsqlStore@10.0.35

#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.

#addin nuget:?package=DKNet.AspCore.Idempotency.NpgsqlStore&version=10.0.35
                    

                            Install as a Cake Addin

#tool nuget:?package=DKNet.AspCore.Idempotency.NpgsqlStore&version=10.0.35
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

DKNet.AspCore.Idempotency.NpgsqlStore

PostgreSQL persistent storage implementation for DKNet.AspCore.Idempotency.

Overview

This library provides a PostgreSQL-backed storage implementation for idempotency keys, replacing the default distributed-cache storage. It uses Entity Framework Core 10 with the Npgsql provider, and detects concurrent duplicate inserts via Postgres's own unique-violation error code (23505) rather than message inspection.

Installation

dotnet add package DKNet.AspCore.Idempotency.NpgsqlStore

Quick Start

using DKNet.AspCore.Idempotency.NpgsqlStore;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddIdempotencyWithNpgsqlStore(
    builder.Configuration.GetConnectionString("IdempotencyDb")!,
    options =>
    {
        options.Expiration = TimeSpan.FromHours(24);
        options.ConflictHandling = IdempotentConflictHandling.CachedResult;
    });

var app = builder.Build();

app.MapPost("/orders", CreateOrder).RequiredIdempotentKey();

app.Run();

appsettings.json:

{
  "ConnectionStrings": {
    "IdempotencyDb": "Host=localhost;Database=MyAppIdempotency;Username=app;Password=changeit"
  }
}

Database Schema

A single IdempotencyKeys table, with a unique index (UX_CompositeKey) on CompositeKey that guarantees exactly one stored entry per idempotency key/endpoint/method combination, and a check constraint (CK_StatusCode_Valid) restricting StatusCode to the 100-599 range.

Concurrency Handling

Concurrent requests with the same idempotency key race to insert; the loser's DbUpdateException is inspected for PostgresException.SqlState == PostgresErrorCodes.UniqueViolation ("23505") and swallowed, so only one entry is ever persisted — no application-level locking required.

Requirements

.NET 10.0+
PostgreSQL 13+
DKNet.AspCore.Idempotency (automatically included)

License

MIT License - see LICENSE file for details.

Product	Compatible and additional computed target framework versions.
.NET	net10.0 is compatible. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net10.0
- DKNet.AspCore.Idempotency (>= 10.0.35)
- Microsoft.EntityFrameworkCore (>= 10.0.10)
- Microsoft.Extensions.DependencyInjection.Abstractions (>= 10.0.10)
- Microsoft.Extensions.Logging.Abstractions (>= 10.0.10)
- Microsoft.Extensions.Options (>= 10.0.10)
- Npgsql.EntityFrameworkCore.PostgreSQL (>= 10.0.3)

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
10.0.35	34	8/5/2026
10.0.34	34	8/5/2026
10.0.33	37	8/4/2026