refactor(db): migrate AI interaction history

Move append-only AI results into an additive provider-aware migration. Preserve generated content, usage counters, indexes, and application cascade semantics.
2026-08-30 18:48:42 +02:00
parent bc28893b6f
commit ae57d1afde
9 changed files with 148 additions and 54 deletions
@@ -0,0 +1,76 @@
+using System;
+using JobTrackerApi.Data;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace JobTrackerApi.Migrations;
+
+/// <summary>
+/// Establishes explicit migration ownership for append-only AI interaction history while retaining
+/// rows provisioned by the historical compatibility bootstrap or startup reconciler.
+/// </summary>
+[DbContext(typeof(JobTrackerContext))]
+[Migration("20260830129000_AdoptAiInteractionSchema")]
+public sealed class AdoptAiInteractionSchema : Migration
+{
+    protected override void Up(MigrationBuilder migrationBuilder)
+    {
+        if (ActiveProvider.Contains("MySql", StringComparison.OrdinalIgnoreCase))
+        {
+            migrationBuilder.Sql("""
+                CREATE TABLE IF NOT EXISTS `AiInteractions` (
+                    `Id` int NOT NULL AUTO_INCREMENT,
+                    `OwnerUserId` varchar(255) NOT NULL,
+                    `JobApplicationId` int NOT NULL,
+                    `Module` varchar(64) NOT NULL,
+                    `Mode` varchar(64) NULL,
+                    `Title` varchar(255) NOT NULL,
+                    `Provider` varchar(100) NOT NULL,
+                    `ResultJson` longtext NOT NULL,
+                    `InputCharacterCount` int NOT NULL DEFAULT 0,
+                    `OutputCharacterCount` int NOT NULL DEFAULT 0,
+                    `EstimatedTokenCount` int NOT NULL DEFAULT 0,
+                    `CreatedAtUtc` datetime(6) NOT NULL,
+                    PRIMARY KEY (`Id`),
+                    CONSTRAINT `FK_AiInteractions_JobApplications_JobApplicationId`
+                        FOREIGN KEY (`JobApplicationId`) REFERENCES `JobApplications` (`Id`) ON DELETE CASCADE
+                ) CHARACTER SET=utf8mb4;
+                CREATE INDEX IF NOT EXISTS `IX_AiInteractions_JobApplicationId`
+                    ON `AiInteractions` (`JobApplicationId`);
+                CREATE INDEX IF NOT EXISTS `IX_AiInteractions_Owner_Job_Module_Created`
+                    ON `AiInteractions` (`OwnerUserId`, `JobApplicationId`, `Module`, `CreatedAtUtc`);
+                """);
+            return;
+        }
+
+        migrationBuilder.Sql("""
+            CREATE TABLE IF NOT EXISTS "AiInteractions" (
+                "Id" INTEGER NOT NULL CONSTRAINT "PK_AiInteractions" PRIMARY KEY AUTOINCREMENT,
+                "OwnerUserId" TEXT NOT NULL,
+                "JobApplicationId" INTEGER NOT NULL,
+                "Module" TEXT NOT NULL,
+                "Mode" TEXT NULL,
+                "Title" TEXT NOT NULL,
+                "Provider" TEXT NOT NULL,
+                "ResultJson" TEXT NOT NULL,
+                "InputCharacterCount" INTEGER NOT NULL DEFAULT 0,
+                "OutputCharacterCount" INTEGER NOT NULL DEFAULT 0,
+                "EstimatedTokenCount" INTEGER NOT NULL DEFAULT 0,
+                "CreatedAtUtc" TEXT NOT NULL,
+                CONSTRAINT "FK_AiInteractions_JobApplications_JobApplicationId"
+                    FOREIGN KEY ("JobApplicationId") REFERENCES "JobApplications" ("Id") ON DELETE CASCADE
+            );
+            CREATE INDEX IF NOT EXISTS "IX_AiInteractions_JobApplicationId"
+                ON "AiInteractions" ("JobApplicationId");
+            CREATE INDEX IF NOT EXISTS "IX_AiInteractions_Owner_Job_Module_Created"
+                ON "AiInteractions" ("OwnerUserId", "JobApplicationId", "Module", "CreatedAtUtc");
+            """);
+    }
+
+    protected override void Down(MigrationBuilder migrationBuilder)
+    {
+        // Preserve append-only AI history that may pre-date explicit migration ownership.
+    }
+}