csharp-mongodb-migrations 1.0.0

.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.7.2 This package targets .NET Framework 4.7.2. The package is compatible with this framework or higher.
This package has a SemVer 2.0.0 package version: 1.0.0+build.55.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package csharp-mongodb-migrations --version 1.0.0                

                    
                

            
NuGet\Install-Package csharp-mongodb-migrations -Version 1.0.0
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="csharp-mongodb-migrations" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add csharp-mongodb-migrations --version 1.0.0                

                    
                

            
#r "nuget: csharp-mongodb-migrations, 1.0.0"
#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. 
// Install csharp-mongodb-migrations as a Cake Addin
#addin nuget:?package=csharp-mongodb-migrations&version=1.0.0

// Install csharp-mongodb-migrations as a Cake Tool
#tool nuget:?package=csharp-mongodb-migrations&version=1.0.0

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MongoDB Migrations

Simple database migrations for MongoDB.Driver using ASP.NET DI.

Quick start

Install the NuGet package & Implement the database migrations system in your solution using the following steps:

dotnet add package csharp-mongodb-migrations
  1. Inject migrations service
  2. Update settings
  3. Await migrations
  4. Implement migrations

Inject migrations service

Inject AddMigrations into your services.

  • If migrations are not in the Assembly.GetEntryAssembly, then manually specify the assemblies in the parameters of AddMigrations.
  • Call AddMigrations after configuring options.
using MongoDB.Migration;

services
    .Configure<MyDatabaseSettings>(builder.Configuration.GetSection("Database:MyDatabaseSettings"))
    .AddMigrations()

Update settings

Implement IMongoMigratable for your database settings.

  • Options must be configured before injecting services.
  • A Database.Alias must be unique: The name used to identify the database during runtime.
  • A Database.Name must be unique: The name of the actual MongoDB database.
  • Assign a unique constant value to MigrationDescriptor.Database.Alias.
public sealed record MyDatabaseSettings : IOptions<MyDatabaseSettings>, IMongoMigratable
{
    public required string ConnectionString { get; init; }
    public required string DatabaseName { get; init; }
    public required string MyCollectionName { get; init; }

    MyDatabaseSettings IOptions<MyDatabaseSettings>.Value => this;

    public MigrationDescriptor GetMigratableDefinition()
    {
        return new()
        {
            ConnectionString = ConnectionString,
            Database = new("MyDatabase", DatabaseName),
            MirgrationStateCollectionName = "DATABASE_MIGRATIONS"
        };
    }
}

Await migrations

Wait for migrations to complete using IMongoMigrationCompletion before accessing the database at any point.

  • WaitAsync may not ever be called in constructors.
  • WaitAsync is fast when the migration is completed, or the database is not configured.
sealed class MyRepository(IOptions<MyDatabaseSettings> databaseSettings, IMongoMigrationCompletion migrationCompletion) {
    private readonly IMongoCollection<MyModel> _myCollection = new MongoClient(databaseSettings.ConnectionString)
        .GetDatabase(databaseSettings.DatabaseName)
        .GetCollection<MyModel>(databaseSettings.MyCollectionName);

    public async Task<MyModel> GetOrSetAsync(MyModel insertModel, CancellationToken cancellationToken = default) {
        _ = await migrationCompletion.WaitAsync(databaseSettings.Value, cancellationToken).ConfigureAwait(false);
        // ... do stuff
    }
}

Implement migrations

Add IMongoMigrations between version 0 and 1 and so on.

  • The alias used for the MongoMigrationAttribute must match the name in IMongoMigratable.GetMigrationSettings().Database.Alias.
[MongoMigration("MyDatabase", 0, 1, Description = "Add composite index to MyCollection")]
public sealed class PoeNinjaAddCompositeIndexMigration(IOptions<MyDatabaseSettings> optionsAccessor) : IMongoMigration
{
    public async Task DownAsync(IMongoDatabase database, CancellationToken cancellationToken = default)
    {
    }

    public async Task UpAsync(IMongoDatabase database, CancellationToken cancellationToken = default)
    {
    }
}

Fixing database versions

A fixed database version ensures that the migration always produces a database of the specified version, even if the initial version was higher than the fixed version.

  • Fixing upgrades the database, if the initial version is lower than the fixed version.
  • Fixing downgrades the database, if the initial version is higher than the fixed version.
  • Fixing the database to a version is especially useful for a procedural feature rollout.

Fix a specific version by setting the long? MigrateToFixedVersion property in your IMongoMigratable; if the property is null - by default - a migration to the latest version will occur.

public MigrationDescriptor GetMigrationSettings()
{
    return new()
    {
        ConnectionString = ConnectionString,
        Database = new("MyDatabase", DatabaseName),
        MirgrationStateCollectionName = "DATABASE_MIGRATIONS",
        MigrateToFixedVersion = 42069,
    };
}

Migrations without ASP.NET DI

MongoDB Migration extensively uses ASP.NET to prepare the environment required for processing of migrations. Without ASP.NET most features are unavailable, but the core - DatabaseMirationProcessor - public API; it is accessible to the user.

  1. Describe your database in the MigrationDescriptor record.
  2. Pack all available IMongoMigrations into the DatabaseMigrationProcessor record.
  3. Instantiate DatabaseMirationProcessor for your database.
  4. Call DatabaseMirationProcessor.MigrateToVersionAsync with the available DatabaseMigrationProcessors.

ToDO

  • Allow upgrading the database to the latest version.
  • Allow upgrading the database to a specific version.
  • Allow downgrading the database to a specific version.
  • Add test cases.

Disclaimer

csharp-mongo-migration is not affiliated with or endorsed by MongoDB. MONGODB & MONGO are registered trademarks of MongoDB, Inc.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 is compatible.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last updated
1.2.0 194 12/21/2023
1.1.1 131 11/5/2023
1.1.0 81 11/4/2023
1.0.0 58 11/3/2023
0.1.4 68 11/3/2023
0.1.3-preview.0.8 52 11/3/2023
0.0.0-preview.0.32 39 11/3/2023
0.0.0-preview.0.28 49 11/3/2023
0.0.0-preview.0.16 45 11/3/2023

https://github.com/ProphetLamb/csharp-mongo-migrations/releases