Migration to fix the People mess up I made (#3303)

API/Data/ManualMigrations/ManualMigrateRemovePeople.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using API.Entities;
+using Kavita.Common.EnvironmentInfo;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+namespace API.Data.ManualMigrations;
+
+/// <summary>
+/// Due to a bug in the initial merge of People/Scanner rework, people got messed up bad. This migration will clear out the table only for nightly users: 0.8.3.15/0.8.3.16
+/// </summary>
+public static class ManualMigrateRemovePeople
+{
+    public static async Task Migrate(DataContext context, ILogger<Program> logger)
+    {
+        if (await context.ManualMigrationHistory.AnyAsync(m => m.Name == "ManualMigrateRemovePeople"))
+        {
+            return;
+        }
+
+        var version = BuildInfo.Version.ToString();
+        if (version != "0.8.3.15" && version != "0.8.3.16")
+        {
+            return;
+        }
+
+        logger.LogCritical("Running ManualMigrateRemovePeople migration - Please be patient, this may take some time. This is not an error");
+
+       context.Person.RemoveRange(context.Person);
+
+        if (context.ChangeTracker.HasChanges())
+        {
+            await context.SaveChangesAsync();
+        }
+
+        await context.ManualMigrationHistory.AddAsync(new ManualMigrationHistory()
+        {
+            Name = "ManualMigrateRemovePeople",
+            ProductVersion = BuildInfo.Version.ToString(),
+            RanAt = DateTime.UtcNow
+        });
+        await context.SaveChangesAsync();
+
+        logger.LogCritical("Running ManualMigrateRemovePeople migration - Completed. This is not an error");
+    }
+}

API/Startup.cs

@@ -273,6 +273,7 @@ public class Startup
 
                     // v0.8.4
                     await MigrateLowestSeriesFolderPath2.Migrate(dataContext, unitOfWork, logger);
+                    await ManualMigrateRemovePeople.Migrate(dataContext, logger);
 
                     //  Update the version in the DB after all migrations are run
                     var installVersion = await unitOfWork.SettingsRepository.GetSettingAsync(ServerSettingKey.InstallVersion);