Marten

Initial Baseline Data

Marten supports seeding your database with initial data via the IInitialData interface. For example:

public class InitialData: IInitialData
{
    private readonly object[] _initialData;

    public InitialData(params object[] initialData)
    {
        _initialData = initialData;
    }

    public async Task Populate(IDocumentStore store)
    {
        using var session = store.LightweightSession();
        // Marten UPSERT will cater for existing records
        session.Store(_initialData);
        await session.SaveChangesAsync();
    }
}

public static class InitialDatasets
{
    public static readonly Company[] Companies =
    {
        new Company { Id = Guid.Parse("2219b6f7-7883-4629-95d5-1a8a6c74b244"), Name = "Netram Ltd." },
        new Company { Id = Guid.Parse("642a3e95-5875-498e-8ca0-93639ddfebcd"), Name = "Acme Inc." }
    };

    public static readonly User[] Users =
    {
        new User { Id = Guid.Parse("331c15b4-b7bd-44d6-a804-b6879f99a65f"),FirstName = "Danger" , LastName = "Mouse" },
        new User { Id = Guid.Parse("9d8ef25a-de9a-41e5-b72b-13f24b735883"), FirstName = "Speedy" , LastName = "Gonzales" }
    };
}

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Add your IInitialData implementations as part of the configuration of your document store as follows:

var store = DocumentStore.For(_ =>
{
    _.DatabaseSchemaName = "Bug962";

    _.Connection(ConnectionSource.ConnectionString);

    // Add as many implementations of IInitialData as you need
    _.InitialData.Add(new InitialData(InitialDatasets.Companies));
    _.InitialData.Add(new InitialData(InitialDatasets.Users));
});

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IInitialData.Populate(IDocumentStore store) will be executed for each configured entry as part of the initialization of your document store. They will be executed in the order they were added.