test(event-subscriber): the projection is sourced from register records (refs #153)

Ports, schema and failing tests for the subscriber half of S-19b-2, ahead of the implementation. The subscriber now listens on the `objecten` kanaal instead of `zaken`. An Objecten notification carries no record data — only the object URL — so the record is read back through the ACL (§8.1), and the zaak-shaped surface goes away: IsZaakCreated / IsZaakStatusSet / ZaakUrl / ZaakId and ToEntry's `Resource == "status"` mapping are replaced by IsRegisterRecordWritten + ObjectUrl. The notification log now holds the projected row itself (register id, status, reference), so a rebuild is a replay with no mapping rules and no upstream reads. The migration drops the old columns rather than renaming them — EF scaffolded renames that would have carried ZGW values into columns meaning something else — and empties both tables, since a pre-slice row is neither reprojectable nor re-derivable from the new source. Red: HandleAsync recognises a register write but does not yet read or project it, so the seven projection assertions fail on an empty store.
2026-08-28 12:32:15 +02:00
parent 566ef7dd64
commit 142ed454aa
12 changed files with 336 additions and 184 deletions
@@ -0,0 +1,87 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Projection.ReadModel;
+
+#nullable disable
+
+namespace Projection.ReadModel.Migrations
+{
+    [DbContext(typeof(ProjectionDbContext))]
+    [Migration("20260828103132_ProjectionSourcedFromObjecten")]
+    partial class ProjectionSourcedFromObjecten
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.0")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Projection.ReadModel.ProcessedNotificationRow", b =>
+                {
+                    b.Property<string>("Key")
+                        .HasColumnType("text")
+                        .HasColumnName("key");
+
+                    b.Property<DateTimeOffset>("ReceivedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("received_at");
+
+                    b.Property<string>("Reference")
+                        .HasColumnType("text")
+                        .HasColumnName("reference");
+
+                    b.Property<string>("RegisterId")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("register_id");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("status");
+
+                    b.HasKey("Key");
+
+                    b.ToTable("processed_notifications", (string)null);
+                });
+
+            modelBuilder.Entity("Projection.ReadModel.RegisterEntryRow", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text")
+                        .HasColumnName("id");
+
+                    b.Property<string>("Bsn")
+                        .HasColumnType("text")
+                        .HasColumnName("bsn");
+
+                    b.Property<string>("NaamPlaceholder")
+                        .HasColumnType("text")
+                        .HasColumnName("naam_placeholder");
+
+                    b.Property<string>("Reference")
+                        .HasColumnType("text")
+                        .HasColumnName("reference");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("status");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("register_projection", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
@@ -0,0 +1,69 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Projection.ReadModel.Migrations
+{
+    /// <summary>
+    /// S-19b-2 (ADR-0030): the notification log stops describing ZGW zaak events and starts holding
+    /// the projected register row itself (register id, status, reference).
+    /// </summary>
+    /// <remarks>
+    /// The old columns are dropped and the new ones added rather than renamed. EF scaffolded renames
+    /// (<c>resource</c> → <c>register_id</c>, <c>zaak_id</c> → <c>status</c>), which would carry ZGW
+    /// values into columns that mean something else entirely — "zaak"/"status" as a register id, a
+    /// zaak uuid as a register status — and a rebuild would then project that garbage.
+    ///
+    /// Both tables are emptied instead. A pre-existing row describes a zaak event the new projector
+    /// cannot reproject, and the registrations behind those rows have no RegisterRecord in Objecten
+    /// (only approvals wrote one before this slice), so they are not re-derivable from the new source
+    /// either. The projection is a derived artefact (§8.4) and repopulates as register writes arrive.
+    /// </remarks>
+    public partial class ProjectionSourcedFromObjecten : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // ponytail: drops the pre-slice register rather than backfilling it. Fine while stacks are
+            // ephemeral (a fresh `docker compose up` is the norm). If a long-lived environment ever
+            // needs to keep them, backfill by walking Objecten's objects instead of replaying the log.
+            migrationBuilder.Sql("DELETE FROM processed_notifications;");
+            migrationBuilder.Sql("DELETE FROM register_projection;");
+
+            migrationBuilder.DropColumn(name: "actie", table: "processed_notifications");
+            migrationBuilder.DropColumn(name: "zaak_id", table: "processed_notifications");
+            migrationBuilder.DropColumn(name: "resource", table: "processed_notifications");
+
+            migrationBuilder.AddColumn<string>(
+                name: "register_id",
+                table: "processed_notifications",
+                type: "text",
+                nullable: false,
+                defaultValue: "");
+
+            migrationBuilder.AddColumn<string>(
+                name: "status",
+                table: "processed_notifications",
+                type: "text",
+                nullable: false,
+                defaultValue: "");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.Sql("DELETE FROM processed_notifications;");
+            migrationBuilder.Sql("DELETE FROM register_projection;");
+
+            migrationBuilder.DropColumn(name: "register_id", table: "processed_notifications");
+            migrationBuilder.DropColumn(name: "status", table: "processed_notifications");
+
+            migrationBuilder.AddColumn<string>(
+                name: "actie", table: "processed_notifications", type: "text", nullable: false, defaultValue: "");
+            migrationBuilder.AddColumn<string>(
+                name: "zaak_id", table: "processed_notifications", type: "text", nullable: false, defaultValue: "");
+            migrationBuilder.AddColumn<string>(
+                name: "resource", table: "processed_notifications", type: "text", nullable: false, defaultValue: "");
+        }
+    }
+}
@@ -28,11 +28,6 @@ namespace Projection.ReadModel.Migrations
                        .HasColumnType("text")
                        .HasColumnName("key");

-                    b.Property<string>("Actie")
-                        .IsRequired()
-                        .HasColumnType("text")
-                        .HasColumnName("actie");
-
                    b.Property<DateTimeOffset>("ReceivedAt")
                        .HasColumnType("timestamp with time zone")
                        .HasColumnName("received_at");
@@ -41,15 +36,15 @@ namespace Projection.ReadModel.Migrations
                        .HasColumnType("text")
                        .HasColumnName("reference");

-                    b.Property<string>("Resource")
+                    b.Property<string>("RegisterId")
                        .IsRequired()
                        .HasColumnType("text")
-                        .HasColumnName("resource");
+                        .HasColumnName("register_id");

-                    b.Property<string>("ZaakId")
+                    b.Property<string>("Status")
                        .IsRequired()
                        .HasColumnType("text")
-                        .HasColumnName("zaak_id");
+                        .HasColumnName("status");

                    b.HasKey("Key");