server/util/Seeder/Recipes/OrganizationWithUsersRecipe.cs

using Bit.Infrastructure.EntityFramework.Models;
using Bit.Infrastructure.EntityFramework.Repositories;
using Bit.Seeder.Factories;
using LinqToDB.EntityFrameworkCore;

namespace Bit.Seeder.Recipes;

public class OrganizationWithUsersRecipe(DatabaseContext db)
{
    public RecipeResult Seed(string name, int users, string domain)
    {
        var organization = OrganizationSeeder.CreateEnterprise(name, domain, users);
        var user = UserSeeder.CreateUser($"admin@{domain}");
        var orgUser = organization.CreateOrganizationUser(user);

        var additionalUsers = new List<User>();
        var additionalOrgUsers = new List<OrganizationUser>();
        for (var i = 0; i < users; i++)
        {
            var additionalUser = UserSeeder.CreateUser($"user{i}@{domain}");
            additionalUsers.Add(additionalUser);
            additionalOrgUsers.Add(organization.CreateOrganizationUser(additionalUser));
        }

        db.Add(organization);
        db.Add(user);
        db.Add(orgUser);

        db.SaveChanges();

        // Use LinqToDB's BulkCopy for significant better performance
        db.BulkCopy(additionalUsers);
        db.BulkCopy(additionalOrgUsers);

        return new RecipeResult
        {
            Result = organization.Id,
            TrackedEntities = new Dictionary<string, List<Guid>>
            {
                ["Organization"] = [organization.Id],
                ["User"] = [user.Id, .. additionalUsers.Select(u => u.Id)]
            }
        };
    }
}