Niek Otten
80d0308de8
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verify-up failed: the event-subscriber and projection-api both migrate the shared
projection DB on start, and EF releases its migrations-history lock between individual
migrations — harmless with one migration, but the new AddNotificationResource made a
second, so a migrator re-applied it in the window between the other's two migrations
("column resource already exists"). Hold a session pg_advisory_lock across the whole
MigrateAsync so the sequence runs exactly once; the second migrator then finds nothing
pending.
Verified by starting both images simultaneously against a fresh Postgres: both reach
health, the resource column is created once, and __EFMigrationsHistory has both rows.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
45 lines
1.7 KiB
C#
45 lines
1.7 KiB
C#
using Microsoft.EntityFrameworkCore;
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using Projection.ReadModel;
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var builder = WebApplication.CreateBuilder(args);
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var connectionString = builder.Configuration.GetConnectionString("Projection")
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?? throw new InvalidOperationException("Missing connection string 'ConnectionStrings:Projection'");
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builder.Services.AddProjectionReadModel(connectionString);
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var app = builder.Build();
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// Ensure the schema exists before serving reads. The Event Subscriber migrates this shared DB too;
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// MigrateProjectionAsync serialises concurrent migrators with a session advisory lock so the whole
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// migration sequence runs exactly once (see ServiceCollectionExtensions).
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await app.Services.MigrateProjectionAsync();
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app.MapGet("/health", () => "Healthy");
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// The read side of the projection. Public-safe field filtering is tightened in S-09; for now
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// the minimal projection only carries id + status (bsn/naam deferred — ADR-0008).
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app.MapGet("/register", async (ProjectionDbContext db, CancellationToken ct) =>
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{
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var rows = await db.RegisterEntries
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.OrderBy(r => r.Id)
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.Select(r => new RegisterEntryDto(r.Id, r.Status, r.Bsn, r.NaamPlaceholder))
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.ToListAsync(ct);
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return Results.Ok(rows);
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});
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app.MapGet("/register/{id}", async (string id, ProjectionDbContext db, CancellationToken ct) =>
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{
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var row = await db.RegisterEntries
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.Where(r => r.Id == id)
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.Select(r => new RegisterEntryDto(r.Id, r.Status, r.Bsn, r.NaamPlaceholder))
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.SingleOrDefaultAsync(ct);
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return row is null ? Results.NotFound() : Results.Ok(row);
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});
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await app.RunAsync();
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public sealed record RegisterEntryDto(string Id, string Status, string? Bsn, string? NaamPlaceholder);
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public partial class Program;
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