Fix DbContext configuration nightmares.

Thanks to julian figuring out IDesignTimeDbContextFactory exists in #6327.

All this DbContext configuration and options setup stuff is insane. Microsoft should be absolutely ashamed for coming up with this load of garbage.

Content.Server.Database/DesignTimeContextFactories.cs

@@ -0,0 +1,25 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+// ReSharper disable UnusedType.Global
+
+namespace Content.Server.Database;
+
+public sealed class DesignTimeContextFactoryPostgres : IDesignTimeDbContextFactory<PostgresServerDbContext>
+{
+    public PostgresServerDbContext CreateDbContext(string[] args)
+    {
+        var optionsBuilder = new DbContextOptionsBuilder<PostgresServerDbContext>();
+        optionsBuilder.UseNpgsql(args[0]);
+        return new PostgresServerDbContext(optionsBuilder.Options);
+    }
+}
+
+public sealed class DesignTimeContextFactorySqlite : IDesignTimeDbContextFactory<SqliteServerDbContext>
+{
+    public SqliteServerDbContext CreateDbContext(string[] args)
+    {
+        var optionsBuilder = new DbContextOptionsBuilder<SqliteServerDbContext>();
+        optionsBuilder.UseSqlite(args[0]);
+        return new SqliteServerDbContext(optionsBuilder.Options);
+    }
+}

Content.Server.Database/Model.cs

@@ -11,22 +11,10 @@ namespace Content.Server.Database
 {
     public abstract class ServerDbContext : DbContext
     {
-        /// <summary>
+        protected ServerDbContext(DbContextOptions options) : base(options)
-        /// The "dotnet ef" CLI tool uses the parameter-less constructor.
-        /// When that happens we want to supply the <see cref="DbContextOptions"/> via <see cref="DbContext.OnConfiguring"/>.
-        /// To use the context within the application, the options need to be passed the constructor instead.
-        /// </summary>
-        protected readonly bool InitializedWithOptions;
-
-        public ServerDbContext()
         {
         }
 
-        public ServerDbContext(DbContextOptions<ServerDbContext> options) : base(options)
-        {
-            InitializedWithOptions = true;
-        }
-
         public DbSet<Preference> Preference { get; set; } = null!;
         public DbSet<Profile> Profile { get; set; } = null!;
         public DbSet<AssignedUserId> AssignedUserId { get; set; } = null!;

Content.Server.Database/ModelPostgres.cs

@@ -8,21 +8,17 @@ namespace Content.Server.Database
 {
     public sealed class PostgresServerDbContext : ServerDbContext
     {
-        // This is used by the "dotnet ef" CLI tool.
-        public PostgresServerDbContext()
-        {
-        }
-
         static PostgresServerDbContext()
         {
             AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
         }
 
+        public PostgresServerDbContext(DbContextOptions<PostgresServerDbContext> options) : base(options)
+        {
+        }
+
         protected override void OnConfiguring(DbContextOptionsBuilder options)
         {
-            if (!InitializedWithOptions)
-                options.UseNpgsql("dummy connection string");
-
             options.ReplaceService<IRelationalTypeMappingSource, CustomNpgsqlTypeMappingSource>();
 
             ((IDbContextOptionsBuilderInfrastructure) options).AddOrUpdateExtension(new SnakeCaseExtension());
@@ -41,10 +37,6 @@ namespace Content.Server.Database
 #endif
         }
 
-        public PostgresServerDbContext(DbContextOptions<ServerDbContext> options) : base(options)
-        {
-        }
-
         protected override void OnModelCreating(ModelBuilder modelBuilder)
         {
             base.OnModelCreating(modelBuilder);

Content.Server.Database/ModelSqlite.cs

@@ -13,15 +13,12 @@ namespace Content.Server.Database
 {
     public sealed class SqliteServerDbContext : ServerDbContext
     {
-        public SqliteServerDbContext()
+        public SqliteServerDbContext(DbContextOptions<SqliteServerDbContext> options) : base(options)
         {
         }
 
         protected override void OnConfiguring(DbContextOptionsBuilder options)
         {
-            if (!InitializedWithOptions)
-                options.UseSqlite("dummy connection string");
-
             ((IDbContextOptionsBuilderInfrastructure) options).AddOrUpdateExtension(new SnakeCaseExtension());
 
             options.ConfigureWarnings(x =>
@@ -70,10 +67,6 @@ namespace Content.Server.Database
                 .HasConversion(jsonConverter);
         }
 
-        public SqliteServerDbContext(DbContextOptions<ServerDbContext> options) : base(options)
-        {
-        }
-
         private static string InetToString(IPAddress address, int mask) {
             if (address.IsIPv4MappedToIPv6)
             {

Content.Server/Database/ServerDbManager.cs

@@ -180,12 +180,12 @@ namespace Content.Server.Database
             switch (engine)
             {
                 case "sqlite":
-                    var options = CreateSqliteOptions();
+                    var sqliteOptions = CreateSqliteOptions();
-                    _db = new ServerDbSqlite(options);
+                    _db = new ServerDbSqlite(sqliteOptions);
                     break;
                 case "postgres":
-                    options = CreatePostgresOptions();
+                    var pgOptions = CreatePostgresOptions();
-                    _db = new ServerDbPostgres(options);
+                    _db = new ServerDbPostgres(pgOptions);
                     break;
                 default:
                     throw new InvalidDataException($"Unknown database engine {engine}.");
@@ -394,7 +394,7 @@ namespace Content.Server.Database
             return _db.RemoveFromWhitelistAsync(player);
         }
 
-        private DbContextOptions<ServerDbContext> CreatePostgresOptions()
+        private DbContextOptions<PostgresServerDbContext> CreatePostgresOptions()
         {
             var host = _cfg.GetCVar(CCVars.DatabasePgHost);
             var port = _cfg.GetCVar(CCVars.DatabasePgPort);
@@ -402,7 +402,7 @@ namespace Content.Server.Database
             var user = _cfg.GetCVar(CCVars.DatabasePgUsername);
             var pass = _cfg.GetCVar(CCVars.DatabasePgPassword);
 
-            var builder = new DbContextOptionsBuilder<ServerDbContext>();
+            var builder = new DbContextOptionsBuilder<PostgresServerDbContext>();
             var connectionString = new NpgsqlConnectionStringBuilder
             {
                 Host = host,
@@ -419,9 +419,9 @@ namespace Content.Server.Database
             return builder.Options;
         }
 
-        private DbContextOptions<ServerDbContext> CreateSqliteOptions()
+        private DbContextOptions<SqliteServerDbContext> CreateSqliteOptions()
         {
-            var builder = new DbContextOptionsBuilder<ServerDbContext>();
+            var builder = new DbContextOptionsBuilder<SqliteServerDbContext>();
 
             var configPreferencesDbPath = _cfg.GetCVar(CCVars.DatabaseSqliteDbPath);
             var inMemory = _res.UserData.RootDir == null;
@@ -447,7 +447,7 @@ namespace Content.Server.Database
             return builder.Options;
         }
 
-        private void SetupLogging(DbContextOptionsBuilder<ServerDbContext> builder)
+        private void SetupLogging(DbContextOptionsBuilder builder)
         {
             builder.UseLoggerFactory(_msLoggerFactory);
         }

Content.Server/Database/ServerDbPostgres.cs

@@ -13,10 +13,10 @@ namespace Content.Server.Database
 {
     public sealed class ServerDbPostgres : ServerDbBase
     {
-        private readonly DbContextOptions<ServerDbContext> _options;
+        private readonly DbContextOptions<PostgresServerDbContext> _options;
         private readonly Task _dbReadyTask;
 
-        public ServerDbPostgres(DbContextOptions<ServerDbContext> options)
+        public ServerDbPostgres(DbContextOptions<PostgresServerDbContext> options)
         {
             _options = options;
 

Content.Server/Database/ServerDbSqlite.cs

@@ -31,7 +31,7 @@ namespace Content.Server.Database
         private readonly Task _dbReadyTask;
         private readonly SqliteServerDbContext _prefsCtx;
 
-        public ServerDbSqlite(DbContextOptions<ServerDbContext> options)
+        public ServerDbSqlite(DbContextOptions<SqliteServerDbContext> options)
         {
             _prefsCtx = new SqliteServerDbContext(options);
 

Content.Tests/Server/Preferences/ServerDbSqliteTests.cs

@@ -67,7 +67,7 @@ namespace Content.Tests.Server.Preferences
 
         private static ServerDbSqlite GetDb()
         {
-            var builder = new DbContextOptionsBuilder<ServerDbContext>();
+            var builder = new DbContextOptionsBuilder<SqliteServerDbContext>();
             var conn = new SqliteConnection("Data Source=:memory:");
             conn.Open();
             builder.UseSqlite(conn);