CSharpMongoMigrations 2.4.0

dotnet add package CSharpMongoMigrations --version 2.4.0
NuGet\Install-Package CSharpMongoMigrations -Version 2.4.0
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="CSharpMongoMigrations" Version="2.4.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add CSharpMongoMigrations --version 2.4.0
#r "nuget: CSharpMongoMigrations, 2.4.0"
#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 CSharpMongoMigrations as a Cake Addin
#addin nuget:?package=CSharpMongoMigrations&version=2.4.0

// Install CSharpMongoMigrations as a Cake Tool
#tool nuget:?package=CSharpMongoMigrations&version=2.4.0

CSharpMongoMigrations

NuGet

What is it?

CSharpMongoMigrations is an alternative .NET library for mongo migrations. Despite the official package the package allows the both Up and Down migrations. It might be a big advantage for the huge MongoDb projects. Moreover, the solution does not have any dependencies from the outdated MongoDb driver. So you don't need to reference different driver versions anymore.

Documentation API

Generally, there are four types of migrations.

  1. Common migration
   [Migration(0, "Add John Doe")]
    public class AddPersonMigration : Migration
    {
        public override void Up()
        {
            var collection = GetCollection("Persons");
            var document = new BsonDocument();

            document.AddUniqueIdentifier(new Guid("06BFFCF5-DAE9-422A-85AB-F58DE41E86DA"));
            document.AddProperty("Name", "John Doe");
            
            collection.InsertOne(document);
        }

        public override void Down()
        {
            var collection = GetCollection("Persons");
            var idFilter = Builders<BsonDocument>.Filter.Eq("_id", new Guid("06BFFCF5-DAE9-422A-85AB-F58DE41E86DA"));
            collection.DeleteOne(idFilter);
        }
    }

Here we define the Up migration to added John Doe to Person collection. The Down method roll back the migration and restore database to the original state.

Pay your attention to the Migration attribute. It's required for running migration by the launcher. You should define the unique migration number (<span style="color:gray">'0' in example</span>) and arbitrary description (<span style="color:gray">'Add John Doe'</span>).

  1. Document migration

These migrations allow to apply changes to each document in the specified collection.

   [Migration(1, "Change persons")]
    public class AddPropertyPersonMigration : DocumentMigration
    {
        protected override string CollectionName { get { return "Persons"; } }
               
        protected override void UpgradeDocument(BsonDocument document)
        {
            document.AddProperty("IsActive", true);            
        }

        protected override void DowngradeDocument(BsonDocument document)
        {
            document.RemoveProperty("IsActive");
        }
    }
  1. Collection migration

These migrations allow to apply changes to each collection separately from another ones.

   [Migration("Animals", 0)]
    public sealed class AddAnimalMigration : Migration
    {
        public override void Up()
        {
            var collection = GetCollection("Animals");
            var document = new BsonDocument();

            document.AddUniqueIdentifier(new Guid("2A7B73A8-3C4A-422D-90B4-C73BCF48EBD4"));
            document.AddProperty("Kind", "Cat");

            collection.InsertOne(document);
        }

        public override void Down()
        {
            var collection = GetCollection("Animals");
            var idFilter = Builders<BsonDocument>.Filter.Eq("_id", new Guid("2A7B73A8-3C4A-422D-90B4-C73BCF48EBD4"));
            collection.DeleteOne(idFilter);
        }
    }

Here, the Migration attribute defines the target collection name and the specific migration version for the predefined collection. It helps us to apply migration to a specific schema.

  1. Conditional migration

These migrations allow to skip specific migration based on defined condition.

    [Migration(4, "Add Migration when condition meets")]
    public sealed class ConditionalMigrations : Migration
    {
        public override void Up()
        {
            var collection = GetCollection("Persons");
            var document = new BsonDocument();

            document.AddUniqueIdentifier(new Guid("20C2CAC4-C55D-4C5C-8937-33698A3EC6C7"));
            document.AddProperty("Name", "John Doe - Conditional");

            collection.InsertOne(document);
        }

        public override void Down()
        {
            var collection = GetCollection("Persons");
            var idFilter = Builders<BsonDocument>.Filter.Eq("_id", new Guid("20C2CAC4-C55D-4C5C-8937-33698A3EC6C7"));
            collection.DeleteOne(idFilter);
        }

        // Check your condition
        public override bool ShouldUp()
        {
            return true;
        }

        // Check your condition
        public override bool ShouldDown()
        {
            return false;
        }
    }

Here, the ShouldUp and ShouldDown overridable methods allow you to check custom conditions to apply or skip migrations.

You can also find more detailed examples in the CSharpMongoMigrations.Demo project.

How to launch migrations?

It's actually simple. You need to create an instance of the MigrationRunner class.

   var runner = new MigrationRunner("<mongoDb_connection_string>", "<database_name>", "<full_name_of_assembly_with_migrations>");

Then you can call the Up or Down method to apply or downgrade migrations.

   // Apply all migrations before specified version.
   // Use -1 as a version parameter to apply all existing migrations. ('-1' is a default parameter value)
   runner.Up("<version>"); 
   
   // Roll back all migrations after specified version.
   // Use -1 as a version parameter to downgrade all existing migrations. ('-1' is a default parameter value)
   runner.Down("<version>"); 

It's worth noting that above methods execute all types of migrations. To launch the collection specific migrations, please use one of the polymorphic methods.

   // Apply all migrations before specified version.
   // Use -1 as a version parameter to apply all existing migrations for the target collection. ('-1' is a default parameter value)
   runner.Up("<Collection_name>", "<version>"); 
   
   // Roll back all migrations after specified version.
   // Use -1 as a version parameter to downgrade all existing migrations for the target collection. ('-1' is a default parameter value)
   runner.Down("<Collection_name>", "<version>"); 
Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  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 was computed.  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 netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen 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
2.4.0 2,973 6/22/2023
2.3.0 18,055 11/5/2021
2.2.0 32,378 1/7/2020
2.1.2 17,907 5/29/2019
2.1.1 2,832 1/8/2019
2.1.0 13,967 7/17/2018
2.0.0 36,265 12/29/2017
1.1.0 1,865 11/25/2016
1.0.3 1,370 7/1/2016
1.0.2 1,327 7/1/2016
1.0.1 1,343 7/1/2016
1.0.0 1,588 6/30/2016

Added conditional migrations. Project is migrated to the .netstandard 2.1.