Put accounts on hold (selection set, by key)

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

using ArxSamples.MySQL;
using ArxSamples.MySQL.Operations.UpdateMultiple.RealCases;

// 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 RealCase1_PutAnAccountOnHold().RunAsync(new SampleContext(connectionString));

The sample, as it is in the repository.

using ARX.SDK;
using ARX.SDK.Services;
using static ArxSamples.MySQL.SampleOutput;

namespace ArxSamples.MySQL.Operations.UpdateMultiple.RealCases;

/// <summary>
/// Credit control puts accounts on hold, in three scenarios: one account by its account number (the declared key); a
/// value the status picklist doesn't allow is refused before the database; every account of a segment at once.
/// </summary>
public sealed class RealCase1_PutAnAccountOnHold : ISample
{
    public string Name => "update-multiple-real-1-put-an-account-on-hold";

    public string Title => "Put accounts on hold (selection set, by key)";

    public async Task RunAsync(SampleContext dbContext)
    {
        foreach (var (number, segment) in new[] { ("ACC-U701", "smb"), ("ACC-U702", "smb"), ("ACC-U703", "smb") })
        {
            var account = new ArxEntity("account");
            account["name"] = "On hold customer " + number;
            account["account_number"] = number;
            account["segments"] = segment;
            await dbContext.Service.CreateAsync(account);
        }

        await Scenario1_OneAccountByItsNumberAsync(dbContext);

        await Scenario2_AValueThePicklistDoesntAllowAsync(dbContext);

        await Scenario3_ManyAccountsAtOnceAsync(dbContext);
    }

    /// <summary>1. The credit team knows the account number, not the id: find the row by the declared key.</summary>
    private static async Task Scenario1_OneAccountByItsNumberAsync(SampleContext dbContext)
    {
        Step("1. One account, by its account number");

        var hold = new ArxEntity("account");
        hold["account_number"] = "ACC-U701";
        hold["status"] = new ArxSelectionSetValue("AccountStatus", "ON_HOLD");

        await dbContext.Service.UpdateAsync(hold, new ArxUpdateOptions { Match = ArxMatch.Key("account_number"), RequireSingleRow = true });
        Show("ACC-U701 is ON_HOLD");

        /* ===========================================================
         * [DIRECT QUERY CHECK]
         * -----------------------------------------------------------
         * SELECT account_number, status
         * FROM account
         * WHERE account_number = 'ACC-U701';
         * -- Expect: 1 row, ON_HOLD.
         * ===========================================================
         */
    }

    /// <summary>2. "SUSPENDED" isn't an AccountStatus option: refused by the catalog, nothing sent.</summary>
    private static async Task Scenario2_AValueThePicklistDoesntAllowAsync(SampleContext dbContext)
    {
        Step("2. A value the picklist doesn't allow");

        var hold = new ArxEntity("account");
        hold["account_number"] = "ACC-U702";
        hold["status"] = new ArxSelectionSetValue("AccountStatus", "SUSPENDED");

        try
        {
            await dbContext.Service.UpdateAsync(hold, new ArxUpdateOptions { Match = ArxMatch.Key("account_number") });
        }
        catch (ArxValidationException error)
        {
            ShowError(error);
        }

        /* ===========================================================
         * [DIRECT QUERY CHECK]
         * -----------------------------------------------------------
         * SELECT account_number, status
         * FROM account
         * WHERE account_number = 'ACC-U702';
         * -- Expect: 1 row, ACTIVE (the default): unchanged.
         * ===========================================================
         */
    }

    /// <summary>3. Several accounts by their numbers in one call: each found by its key, all or nothing.</summary>
    private static async Task Scenario3_ManyAccountsAtOnceAsync(SampleContext dbContext)
    {
        Step("3. Several accounts in one call");

        var holds = new[] { "ACC-U701", "ACC-U703" }.Select(number =>
        {
            var hold = new ArxEntity("account");
            hold["account_number"] = number;
            hold["status"] = new ArxSelectionSetValue("AccountStatus", "ON_HOLD");
            return hold;
        }).ToList();

        var changed = await dbContext.Service.UpdateMultipleAsync(holds, new ArxUpdateOptions { Match = ArxMatch.Key("account_number") });
        Show($"{changed} accounts on hold");

        /* ===========================================================
         * [DIRECT QUERY CHECK]
         * -----------------------------------------------------------
         * SELECT account_number, status
         * FROM account
         * WHERE account_number IN ('ACC-U701', 'ACC-U702', 'ACC-U703')
         * ORDER BY account_number;
         * -- Expect: ACC-U701 ON_HOLD, ACC-U702 ACTIVE (refused in scenario 2), ACC-U703 ON_HOLD.
         * ===========================================================
         */
    }
}

  > 1. One account, by its account number
      ACC-U701 is ON_HOLD
  > 2. A value the picklist doesn't allow
      caught ArxValidationException: ARX1011 SelectionSetValueNotAllowed: Selection set 'AccountStatus' has no option with this code (or the code is of another kind) (attribute 'status' on 'account').
  > 3. Several accounts in one call
      2 accounts on hold