Create many records without reading their ids

Runs the sample. Generated for this page; it reads the connection string from the environment.

using ArxSamples.MySQL;
using ArxSamples.MySQL.Operations.CreateMultiple.Basics;

// The connection string comes from the environment, never from the code (see "Configure the connection").
var connectionString = Environment.GetEnvironmentVariable("ARX_SAMPLES_MYSQL")
    ?? throw new InvalidOperationException("Set the ARX_SAMPLES_MYSQL environment variable to your MySQL connection string.");

await new Basic3_WithoutIds().RunAsync(new SampleContext(connectionString));

The sample, as it is in the repository.

using ARX.SDK;
using ARX.SDK.MySQL.Services;
using ARX.SDK.Services;

using static ArxSamples.MySQL.SampleOutput;

namespace ArxSamples.MySQL.Operations.CreateMultiple.Basics;

/// <summary>
/// Many records created when the program doesn't need their ids: ReturnIds = false reads none back, and needs no id column: on MySQL it is the same multi-row INSERT. Still all
/// or nothing.
/// </summary>
/// <remarks>
/// <para>The call returns one ArxRecordId.None per entity, so code that switches between the two forms keeps its type.</para>
/// <para>Needs ARX.SDK 0.1.0-preview.5 or later.</para>
/// </remarks>
public sealed class Basic3_WithoutIds : ISample
{
    public string Name => "create-multiple-basics-3-without-ids";

    public string Title => "Create many records without reading their ids";

    public async Task RunAsync(SampleContext dbContext)
    {
        await Scenario1_ALoadWithoutIdsAsync(dbContext.ConnectionString);
    }

    /// <summary>1. A thousand accounts in one call; no id comes back.</summary>
    private static async Task Scenario1_ALoadWithoutIdsAsync(string connectionString)
    {
        Step("1. A load without ids");

        var service = new ArxMySqlDbService(connectionString, ArxSchemaCatalog.Create()
            .Table("account", ArxIdColumn.Generated<long>("id"))
            .Build());

        var accounts = new List<ArxEntity>();

        for (var i = 1; i <= 1000; i++)
        {
            var account = new ArxEntity("account");
            account["name"] = $"Bulk account {i}";
            account["account_number"] = $"ACC-F3{i:0000}";
            account["employee_count"] = i % 50;
            accounts.Add(account);
        }

        var ids = await service.CreateMultipleAsync(accounts, new ArxCreateMultipleOptions { ReturnIds = false });

        Show($"{ids.Count} accounts created; ids returned: {ids.Count(x => x.HasValue)}");

        /* ===========================================================
         * [DIRECT QUERY CHECK]
         * -----------------------------------------------------------
         * SELECT count(*)
         * FROM account
         * WHERE account_number LIKE 'ACC-F3%';
         * -- Expect: 1000.
         * ===========================================================
         */
    }
}

What every sample is given: the connection string (and the ISample interface the samples implement).

namespace ArxSamples.MySQL;

/// <summary>One documentation sample: a scenario a real application has, shown end to end.</summary>
public interface ISample
{
    /// <summary>The name to run it alone: <c>dotnet run -- &lt;name&gt;</c>.</summary>
    string Name { get; }

    /// <summary>One line on what it shows.</summary>
    string Title { get; }

    Task RunAsync(SampleContext dbContext);
}

/// <summary>
/// What a sample is given. Every sample gets the connection string; the application's service and catalog
/// (SampleContext.Application.cs) and the plain MySqlConnector read-back helper (SampleContext.Direct.cs) live in their own
/// files, so a sample needs only the files it uses.
/// </summary>
public sealed partial class SampleContext
{
    public SampleContext(string connectionString)
    {
        ConnectionString = connectionString;
    }

    public string ConnectionString { get; }
}

How the samples print: Step for each scenario, Show for what it did, ShowError for an error caught on purpose.

using ARX.SDK;

namespace ArxSamples.MySQL;

/// <summary>How the samples print: a numbered step for each scenario, then what it did.</summary>
public static class SampleOutput
{
    /// <summary>The start of a scenario: <c>Step("1. By the id Create returned")</c>.</summary>
    public static void Step(string text) => Console.WriteLine($"  > {text}");

    /// <summary>What the scenario did.</summary>
    public static void Show(string text) => Console.WriteLine($"      {text}");

    /// <summary>An ARX error the scenario caught on purpose.</summary>
    public static void ShowError(ArxException exception)
        => Console.WriteLine($"      caught {exception.GetType().Name}: {exception.Message}");
}

  > 1. A load without ids
      1000 accounts created; ids returned: 0