Upgrade to HotChocolate 14 RC. Setup DataLoaders, Filtering, and Sorting.

CBT with new API transformer procedure

src/Tgstation.Server.Host/Authority/Core/AuthorityInvoker{TAuthority}.cs

@@ -1,9 +1,8 @@
 using System;
+using System.Linq;
 using System.Net;
 using System.Threading.Tasks;
 
-using HotChocolate.Execution;
-
 using Microsoft.AspNetCore.Mvc;
 using Tgstation.Server.Host.Controllers;
 using Tgstation.Server.Host.Extensions;
@@ -12,10 +11,7 @@ using Tgstation.Server.Host.Models;
 
 namespace Tgstation.Server.Host.Authority.Core
 {
-	/// <summary>
-	/// Invokes <typeparamref name="TAuthority"/>s.
-	/// </summary>
-	/// <typeparam name="TAuthority">The <see cref="IAuthority"/> invoked.</typeparam>
+	/// <inheritdoc />
 	sealed class AuthorityInvoker<TAuthority> : IRestAuthorityInvoker<TAuthority>, IGraphQLAuthorityInvoker<TAuthority>
 		where TAuthority : IAuthority
 	{
@@ -25,7 +21,7 @@ namespace Tgstation.Server.Host.Authority.Core
 		readonly TAuthority authority;
 
 		/// <summary>
-		/// Throws a <see cref="QueryException"/> for errored <paramref name="authorityResponse"/>s.
+		/// Throws a <see cref="ErrorMessageException"/> for errored <paramref name="authorityResponse"/>s.
 		/// </summary>
 		/// <param name="authorityResponse">The potentially errored <paramref name="authorityResponse"/>.</param>
 		static void ThrowGraphQLErrorIfNecessary(AuthorityResponse authorityResponse)
@@ -49,16 +45,21 @@ namespace Tgstation.Server.Host.Authority.Core
 		/// <inheritdoc />
 		public async ValueTask<IActionResult> Invoke(ApiController controller, Func<TAuthority, ValueTask<AuthorityResponse>> authorityInvoker)
 		{
+			ArgumentNullException.ThrowIfNull(controller);
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+
 			var authorityResponse = await authorityInvoker(authority);
 			return CreateErroredActionResult(controller, authorityResponse) ?? controller.NoContent();
 		}
 
 		/// <inheritdoc />
 		public async ValueTask<IActionResult> InvokeTransformable<TResult, TApiModel>(ApiController controller, Func<TAuthority, ValueTask<AuthorityResponse<TResult>>> authorityInvoker)
-
-			where TResult : notnull, IApiTransformable<TApiModel>
+			where TResult : notnull, ILegacyApiTransformable<TApiModel>
 			where TApiModel : notnull
 		{
+			ArgumentNullException.ThrowIfNull(controller);
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+
 			var authorityResponse = await authorityInvoker(authority);
 			var erroredResult = CreateErroredActionResult(controller, authorityResponse);
 			if (erroredResult != null)
@@ -72,6 +73,9 @@ namespace Tgstation.Server.Host.Authority.Core
 		/// <inheritdoc />
 		async ValueTask<IActionResult> IRestAuthorityInvoker<TAuthority>.Invoke<TResult, TApiModel>(ApiController controller, Func<TAuthority, ValueTask<AuthorityResponse<TResult>>> authorityInvoker)
 		{
+			ArgumentNullException.ThrowIfNull(controller);
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+
 			var authorityResponse = await authorityInvoker(authority);
 			var erroredResult = CreateErroredActionResult(controller, authorityResponse);
 			if (erroredResult != null)
@@ -84,6 +88,8 @@ namespace Tgstation.Server.Host.Authority.Core
 		/// <inheritdoc />
 		async ValueTask IGraphQLAuthorityInvoker<TAuthority>.Invoke(Func<TAuthority, ValueTask<AuthorityResponse>> authorityInvoker)
 		{
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+
 			var authorityResponse = await authorityInvoker(authority);
 			ThrowGraphQLErrorIfNecessary(authorityResponse);
 		}
@@ -93,19 +99,42 @@ namespace Tgstation.Server.Host.Authority.Core
 			where TResult : TApiModel
 			where TApiModel : notnull
 		{
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+
 			var authorityResponse = await authorityInvoker(authority);
 			ThrowGraphQLErrorIfNecessary(authorityResponse);
 			return authorityResponse.Result!;
 		}
 
 		/// <inheritdoc />
-		async ValueTask<TApiModel> IGraphQLAuthorityInvoker<TAuthority>.InvokeTransformable<TResult, TApiModel>(Func<TAuthority, ValueTask<AuthorityResponse<TResult>>> authorityInvoker)
+		async ValueTask<TApiModel> IGraphQLAuthorityInvoker<TAuthority>.InvokeTransformable<TResult, TApiModel, TTransformer>(Func<TAuthority, ValueTask<AuthorityResponse<TResult>>> authorityInvoker)
 		{
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+
 			var authorityResponse = await authorityInvoker(authority);
 			ThrowGraphQLErrorIfNecessary(authorityResponse);
 			return authorityResponse.Result!.ToApi();
 		}
 
+		/// <inheritdoc />
+		public IQueryable<TResult> InvokeQueryable<TResult>(Func<TAuthority, IQueryable<TResult>> authorityInvoker)
+		{
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+			return authorityInvoker(authority);
+		}
+
+		/// <inheritdoc />
+		public IQueryable<TApiModel> InvokeTransformableQueryable<TResult, TApiModel, TTransformer>(Func<TAuthority, IQueryable<TResult>> authorityInvoker)
+			where TResult : IApiTransformable<TResult, TApiModel, TTransformer>
+			where TApiModel : notnull
+			where TTransformer : ITransformer<TResult, TApiModel>, new()
+		{
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+			var expression = new TTransformer().Expression;
+			return authorityInvoker(authority)
+				.Select(expression);
+		}
+
 		/// <summary>
 		/// Create an <see cref="IActionResult"/> for a given <paramref name="authorityResponse"/> if it is erroring.
 		/// </summary>

src/Tgstation.Server.Host/Authority/Core/IAuthorityInvoker{TAuthority}.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Linq;
+
+using Tgstation.Server.Host.Models;
+
+namespace Tgstation.Server.Host.Authority.Core
+{
+	/// <summary>
+	/// Invokes <typeparamref name="TAuthority"/>s.
+	/// </summary>
+	/// <typeparam name="TAuthority">The <see cref="IAuthority"/> invoked.</typeparam>
+	public interface IAuthorityInvoker<TAuthority>
+		where TAuthority : IAuthority
+	{
+		/// <summary>
+		/// Invoke a <typeparamref name="TAuthority"/> method and get the result.
+		/// </summary>
+		/// <typeparam name="TResult">The returned <see cref="Type"/>.</typeparam>
+		/// <param name="authorityInvoker">The <typeparamref name="TAuthority"/> <see cref="Func{T, TResult}"/> returning a <see cref="IQueryable{T}"/> <typeparamref name="TResult"/>.</param>
+		/// <returns>A <see cref="IQueryable{T}"/> <typeparamref name="TResult"/> returned.</returns>
+		IQueryable<TResult> InvokeQueryable<TResult>(Func<TAuthority, IQueryable<TResult>> authorityInvoker);
+
+		/// <summary>
+		/// Invoke a <typeparamref name="TAuthority"/> method and get the transformed result.
+		/// </summary>
+		/// <typeparam name="TResult">The <see cref="Type"/> returned by the <typeparamref name="TAuthority"/>.</typeparam>
+		/// <typeparam name="TApiModel">The returned <see cref="Type"/>.</typeparam>
+		/// <typeparam name="TTransformer">The <see cref="ITransformer{TInput, TOutput}"/> for converting <typeparamref name="TResult"/>s to <typeparamref name="TApiModel"/>s.</typeparam>
+		/// <param name="authorityInvoker">The <typeparamref name="TAuthority"/> <see cref="Func{T, TResult}"/> returning a <see cref="IQueryable{T}"/> <typeparamref name="TResult"/>.</param>
+		/// <returns>A <see cref="IQueryable{T}"/> <typeparamref name="TResult"/> returned.</returns>
+		IQueryable<TApiModel> InvokeTransformableQueryable<TResult, TApiModel, TTransformer>(Func<TAuthority, IQueryable<TResult>> authorityInvoker)
+			where TResult : IApiTransformable<TResult, TApiModel, TTransformer>
+			where TApiModel : notnull
+			where TTransformer : ITransformer<TResult, TApiModel>, new();
+	}
+}

src/Tgstation.Server.Host/Authority/Core/IGraphQLAuthorityInvoker{TAuthority}.cs

@@ -9,7 +9,7 @@ namespace Tgstation.Server.Host.Authority.Core
 	/// Invokes <typeparamref name="TAuthority"/>s from GraphQL endpoints.
 	/// </summary>
 	/// <typeparam name="TAuthority">The <see cref="IAuthority"/> invoked.</typeparam>
-	public interface IGraphQLAuthorityInvoker<TAuthority>
+	public interface IGraphQLAuthorityInvoker<TAuthority> : IAuthorityInvoker<TAuthority>
 		where TAuthority : IAuthority
 	{
 		/// <summary>
@@ -35,10 +35,12 @@ namespace Tgstation.Server.Host.Authority.Core
 		/// </summary>
 		/// <typeparam name="TResult">The <see cref="AuthorityResponse{TResult}.Result"/> <see cref="Type"/>.</typeparam>
 		/// <typeparam name="TApiModel">The resulting <see cref="Type"/> of the return value.</typeparam>
+		/// <typeparam name="TTransformer">The <see cref="ITransformer{TInput, TOutput}"/> for converting <typeparamref name="TResult"/>s to <typeparamref name="TApiModel"/>s.</typeparam>
 		/// <param name="authorityInvoker">The <typeparamref name="TAuthority"/> <see cref="Func{T, TResult}"/> returning a <see cref="ValueTask{TResult}"/> resulting in the <see cref="AuthorityResponse{TResult}"/>.</param>
 		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in the <typeparamref name="TApiModel"/> generated for the resulting <see cref="AuthorityResponse{TResult}"/>.</returns>
-		ValueTask<TApiModel> InvokeTransformable<TResult, TApiModel>(Func<TAuthority, ValueTask<AuthorityResponse<TResult>>> authorityInvoker)
-			where TResult : notnull, IApiTransformable<TApiModel>
-			where TApiModel : notnull;
+		ValueTask<TApiModel> InvokeTransformable<TResult, TApiModel, TTransformer>(Func<TAuthority, ValueTask<AuthorityResponse<TResult>>> authorityInvoker)
+			where TResult : notnull, IApiTransformable<TResult, TApiModel, TTransformer>
+			where TApiModel : notnull
+			where TTransformer : ITransformer<TResult, TApiModel>, new();
 	}
 }

src/Tgstation.Server.Host/Authority/Core/IRestAuthorityInvoker{TAuthority}.cs

@@ -11,7 +11,7 @@ namespace Tgstation.Server.Host.Authority.Core
 	/// Invokes <typeparamref name="TAuthority"/> methods and generates <see cref="IActionResult"/> responses.
 	/// </summary>
 	/// <typeparam name="TAuthority">The type of <see cref="IAuthority"/>.</typeparam>
-	public interface IRestAuthorityInvoker<TAuthority>
+	public interface IRestAuthorityInvoker<TAuthority> : IAuthorityInvoker<TAuthority>
 		where TAuthority : IAuthority
 	{
 		/// <summary>
@@ -43,7 +43,7 @@ namespace Tgstation.Server.Host.Authority.Core
 		/// <param name="authorityInvoker">The <typeparamref name="TAuthority"/> <see cref="Func{T, TResult}"/> returning a <see cref="ValueTask{TResult}"/> resulting in the <see cref="AuthorityResponse{TResult}"/>.</param>
 		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in the <see cref="IActionResult"/> generated for the resulting <see cref="AuthorityResponse{TResult}"/>.</returns>
 		ValueTask<IActionResult> InvokeTransformable<TResult, TApiModel>(ApiController controller, Func<TAuthority, ValueTask<AuthorityResponse<TResult>>> authorityInvoker)
-			where TResult : notnull, IApiTransformable<TApiModel>
+			where TResult : notnull, ILegacyApiTransformable<TApiModel>
 			where TApiModel : notnull;
 	}
 }

src/Tgstation.Server.Host/Authority/IUserAuthority.cs

@@ -38,8 +38,8 @@ namespace Tgstation.Server.Host.Authority
 		/// Gets all registered <see cref="User"/>s.
 		/// </summary>
 		/// <param name="includeJoins">If related entities should be loaded.</param>
-		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in a <see cref="IQueryable{T}"/> <see cref="User"/> <see cref="AuthorityResponse{TResult}"/>.</returns>
+		/// <returns>A <see cref="IQueryable{T}"/> of <see cref="User"/>s.</returns>
 		[TgsAuthorize(AdministrationRights.ReadUsers)]
-		public ValueTask<AuthorityResponse<IQueryable<User>>> List(bool includeJoins);
+		public IQueryable<User> Queryable(bool includeJoins);
 	}
 }

src/Tgstation.Server.Host/Authority/UserAuthority.cs

@@ -1,8 +1,11 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 
+using GreenDonut;
+
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
 
@@ -21,24 +24,55 @@ namespace Tgstation.Server.Host.Authority
 		/// </summary>
 		readonly IDatabaseContext databaseContext;
 
+		/// <summary>
+		/// The <see cref="IUsersDataLoader"/> for the <see cref="UserAuthority"/>.
+		/// </summary>
+		readonly IUsersDataLoader dataLoader;
+
 		/// <summary>
 		/// The <see cref="IAuthenticationContext"/> for the <see cref="UserAuthority"/>.
 		/// </summary>
 		readonly IAuthenticationContext authenticationContext;
 
+		/// <summary>
+		/// Implements the <see cref="dataLoader"/>.
+		/// </summary>
+		/// <param name="ids">The <see cref="IReadOnlyCollection{T}"/> of <see cref="User"/> <see cref="Api.Models.EntityId.Id"/>s to load.</param>
+		/// <param name="databaseContext">The <see cref="IDatabaseContext"/> to load from.</param>
+		/// <param name="cancellationToken">The <see cref="CancellationToken"/> for the operation.</param>
+		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in a <see cref="Dictionary{TKey, TValue}"/> of the requested <see cref="User"/>s.</returns>
+		[DataLoader]
+		public static async ValueTask<Dictionary<long, User>> GetUsers(
+			IReadOnlyList<long> ids,
+			IDatabaseContext databaseContext,
+			CancellationToken cancellationToken)
+		{
+			ArgumentNullException.ThrowIfNull(ids);
+			ArgumentNullException.ThrowIfNull(databaseContext);
+
+			return await databaseContext
+				.Users
+				.AsQueryable()
+				.Where(x => ids.Contains(x.Id!.Value))
+				.ToDictionaryAsync(user => user.Id!.Value, cancellationToken);
+		}
+
 		/// <summary>
 		/// Initializes a new instance of the <see cref="UserAuthority"/> class.
 		/// </summary>
 		/// <param name="logger">The <see cref="ILogger"/> to use.</param>
 		/// <param name="databaseContext">The value of <see cref="databaseContext"/>.</param>
+		/// <param name="dataLoader">The value of <see cref="dataLoader"/>.</param>
 		/// <param name="authenticationContext">The value of <see cref="authenticationContext"/>.</param>
 		public UserAuthority(
 			ILogger<UserAuthority> logger,
 			IDatabaseContext databaseContext,
+			IUsersDataLoader dataLoader,
 			IAuthenticationContext authenticationContext)
 			: base(logger)
 		{
 			this.databaseContext = databaseContext ?? throw new ArgumentNullException(nameof(databaseContext));
+			this.dataLoader = dataLoader ?? throw new ArgumentNullException(nameof(dataLoader));
 			this.authenticationContext = authenticationContext ?? throw new ArgumentNullException(nameof(authenticationContext));
 		}
 
@@ -49,11 +83,18 @@ namespace Tgstation.Server.Host.Authority
 		/// <inheritdoc />
 		public async ValueTask<AuthorityResponse<User>> GetId(long id, bool includeJoins, bool allowSystemUser, CancellationToken cancellationToken)
 		{
-			var queryable = ListCore(includeJoins);
+			User? user;
+			if (includeJoins)
+			{
+				var queryable = Queryable(true, true);
+
+				user = await queryable.FirstOrDefaultAsync(
+					dbModel => dbModel.Id == id,
+					cancellationToken);
+			}
+			else
+				user = await dataLoader.LoadAsync(id, cancellationToken);
 
-			var user = await queryable.FirstOrDefaultAsync(
-				dbModel => dbModel.Id == id,
-				cancellationToken);
 			if (user == default)
 				return NotFound<User>();
 
@@ -64,26 +105,26 @@ namespace Tgstation.Server.Host.Authority
 		}
 
 		/// <inheritdoc />
-		public ValueTask<AuthorityResponse<IQueryable<User>>> List(bool includeJoins)
-		{
-			var systemUserCanonicalName = User.CanonicalizeName(User.TgsSystemUserName);
-			return ValueTask.FromResult(
-				new AuthorityResponse<IQueryable<User>>(
-					ListCore(includeJoins)
-						.Where(x => x.CanonicalName != systemUserCanonicalName)));
-		}
+		public IQueryable<User> Queryable(bool includeJoins)
+			=> Queryable(includeJoins, false);
 
 		/// <summary>
-		/// Generates an <see cref="IQueryable{T}"/> for listing <see cref="User"/>s.
+		/// Gets all registered <see cref="User"/>s.
 		/// </summary>
 		/// <param name="includeJoins">If related entities should be loaded.</param>
-		/// <returns>A new <see cref="IQueryable{T}"/> of <see cref="User"/>s.</returns>
-		private IQueryable<User> ListCore(bool includeJoins)
+		/// <param name="allowSystemUser">If the <see cref="User"/> with the <see cref="User.TgsSystemUserName"/> should be included in results.</param>
+		/// <returns>A <see cref="IQueryable{T}"/> of <see cref="User"/>s.</returns>
+		IQueryable<User> Queryable(bool includeJoins, bool allowSystemUser)
 		{
+			var tgsUserCanonicalName = User.CanonicalizeName(User.TgsSystemUserName);
 			var queryable = databaseContext
 				.Users
 				.AsQueryable();
 
+			if (!allowSystemUser)
+				queryable = queryable
+					.Where(user => user.CanonicalName != tgsUserCanonicalName);
+
 			if (includeJoins)
 				queryable = queryable
 					.Include(x => x.CreatedBy)

src/Tgstation.Server.Host/Controllers/ApiController.cs

@@ -288,7 +288,7 @@ namespace Tgstation.Server.Host.Controllers
 			int? pageQuery,
 			int? pageSizeQuery,
 			CancellationToken cancellationToken)
-			where TModel : IApiTransformable<TApiModel>
+			where TModel : ILegacyApiTransformable<TApiModel>
 			=> PaginatedImpl(
 				queryGenerator,
 				resultTransformer,
@@ -299,7 +299,7 @@ namespace Tgstation.Server.Host.Controllers
 		/// <summary>
 		/// Generates a paginated response.
 		/// </summary>
-		/// <typeparam name="TModel">The <see cref="Type"/> of model being generated. If different from <typeparamref name="TResultModel"/>, must implement <see cref="IApiTransformable{TApiModel}"/> for <typeparamref name="TResultModel"/>.</typeparam>
+		/// <typeparam name="TModel">The <see cref="Type"/> of model being generated. If different from <typeparamref name="TResultModel"/>, must implement <see cref="ILegacyApiTransformable{TApiModel}"/> for <typeparamref name="TResultModel"/>.</typeparam>
 		/// <typeparam name="TResultModel">The <see cref="Type"/> of model being returned.</typeparam>
 		/// <param name="queryGenerator">A <see cref="Func{TResult}"/> resulting in a <see cref="ValueTask{TResult}"/> resulting in the generated <see cref="PaginatableResult{TModel}"/>.</param>
 		/// <param name="resultTransformer">A <see cref="Func{T, TResult}"/> to transform the <typeparamref name="TResultModel"/>s after being queried.</param>
@@ -356,7 +356,7 @@ namespace Tgstation.Server.Host.Controllers
 				finalResults = (List<TResultModel>)(object)pagedResults; // clearly a safe cast
 			else
 				finalResults = pagedResults
-					.OfType<IApiTransformable<TResultModel>>()
+					.OfType<ILegacyApiTransformable<TResultModel>>()
 					.Select(x => x.ToApi())
 					.ToList();
 

src/Tgstation.Server.Host/Controllers/UserController.cs

@@ -371,21 +371,14 @@ namespace Tgstation.Server.Host.Controllers
 		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in the <see cref="IActionResult"/> of the operation.</returns>
 		/// <response code="200">Retrieved <see cref="User"/>s successfully.</response>
 		[HttpGet(Routes.List)]
-		[TgsAuthorize(AdministrationRights.ReadUsers)]
+		[TgsRestAuthorize<IUserAuthority>(nameof(IUserAuthority.Queryable))]
 		[ProducesResponseType(typeof(PaginatedResponse<UserResponse>), 200)]
 		public ValueTask<IActionResult> List([FromQuery] int? page, [FromQuery] int? pageSize, CancellationToken cancellationToken)
 			=> Paginated<User, UserResponse>(
 				() => ValueTask.FromResult(
 					new PaginatableResult<User>(
-						DatabaseContext
-							.Users
-							.AsQueryable()
-							.Where(x => x.CanonicalName != Models.User.CanonicalizeName(Models.User.TgsSystemUserName))
-							.Include(x => x.CreatedBy)
-							.Include(x => x.PermissionSet)
-							.Include(x => x.OAuthConnections)
-							.Include(x => x.Group!)
-								.ThenInclude(x => x.PermissionSet)
+						userAuthority.InvokeQueryable(
+							authority => authority.Queryable(true))
 							.OrderBy(x => x.Id))),
 				null,
 				page,

src/Tgstation.Server.Host/Core/Application.cs

@@ -297,10 +297,19 @@ namespace Tgstation.Server.Host.Core
 					.AddGraphQLServer()
 					.AddAuthorization()
 					.AddMutationConventions()
+					.AddGlobalObjectIdentification()
 					.ModifyOptions(options =>
 					{
 						options.EnableDefer = true;
 					})
+					.ModifyPagingOptions(pagingOptions =>
+					{
+						pagingOptions.IncludeTotalCount = true;
+						pagingOptions.RequirePagingBoundaries = false;
+					})
+					.AddFiltering()
+					.AddSorting()
+					.AddHostTypes()
 					.AddErrorFilter<ErrorMessageFilter>()
 					.AddType<LocalGateway>()
 					.AddType<RemoteGateway>()

src/Tgstation.Server.Host/GraphQL/Interfaces/IGateway.cs

@@ -11,7 +11,7 @@ using Tgstation.Server.Host.System;
 namespace Tgstation.Server.Host.GraphQL.Interfaces
 {
 	/// <summary>
-	/// Management interface for the parent <see cref="Node"/>.
+	/// Management interface for the parent <see cref="SwarmNode"/>.
 	/// </summary>
 	public interface IGateway
 	{

src/Tgstation.Server.Host/GraphQL/Types/Entity.cs

@@ -1,4 +1,6 @@
-using HotChocolate.Types.Relay;
+using System.Diagnostics.CodeAnalysis;
+
+using HotChocolate.Types.Relay;
 
 namespace Tgstation.Server.Host.GraphQL.Types
 {
@@ -11,12 +13,20 @@ namespace Tgstation.Server.Host.GraphQL.Types
 		/// The ID of the <see cref="Entity"/>.
 		/// </summary>
 		[ID]
-		public long Id { get; }
+		public required long Id { get; init; }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="Entity"/> class.
+		/// </summary>
+		protected Entity()
+		{
+		}
 
 		/// <summary>
 		/// Initializes a new instance of the <see cref="Entity"/> class.
 		/// </summary>
 		/// <param name="id">The value of <see cref="Id"/>.</param>
+		[SetsRequiredMembers]
 		protected Entity(long id)
 		{
 			Id = id;

src/Tgstation.Server.Host/GraphQL/Types/LocalGateway.cs

@@ -13,7 +13,7 @@ using Tgstation.Server.Host.System;
 namespace Tgstation.Server.Host.GraphQL.Types
 {
 	/// <summary>
-	/// <see cref="IGateway"/> for the <see cref="Node"/> this query is executing on.
+	/// <see cref="IGateway"/> for the <see cref="SwarmNode"/> this query is executing on.
 	/// </summary>
 	public sealed class LocalGateway : IGateway
 	{

src/Tgstation.Server.Host/GraphQL/Types/NamedEntity.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 
 using Tgstation.Server.Host.GraphQL.Interfaces;
 
@@ -12,12 +13,20 @@ namespace Tgstation.Server.Host.GraphQL.Types
 		/// <summary>
 		/// The name of the <see cref="NamedEntity"/>.
 		/// </summary>
-		public string Name { get; }
+		public required string Name { get; init; }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="NamedEntity"/> class.
+		/// </summary>
+		protected NamedEntity()
+		{
+		}
 
 		/// <summary>
 		/// Initializes a new instance of the <see cref="NamedEntity"/> class.
 		/// </summary>
 		/// <param name="copy">The <see cref="IUserName"/> to copy.</param>
+		[SetsRequiredMembers]
 		protected NamedEntity(NamedEntity copy)
 			: base(copy?.Id ?? throw new ArgumentNullException(nameof(copy)))
 		{
@@ -29,6 +38,7 @@ namespace Tgstation.Server.Host.GraphQL.Types
 		/// </summary>
 		/// <param name="id">The ID for the <see cref="Entity"/>.</param>
 		/// <param name="name">The value of <see cref="Name"/>.</param>
+		[SetsRequiredMembers]
 		protected NamedEntity(long id, string name)
 			: base(id)
 		{

src/Tgstation.Server.Host/GraphQL/Types/NodeInformation.cs

@@ -1,14 +1,34 @@
 using System;
+using System.Linq;
 
+using HotChocolate;
 using HotChocolate.Types.Relay;
 
+using Tgstation.Server.Host.Swarm;
+
 namespace Tgstation.Server.Host.GraphQL.Types
 {
 	/// <summary>
 	/// Represent a server in the TGS server swarm.
 	/// </summary>
+	[Node]
 	public sealed class NodeInformation
 	{
+		public NodeInformation? GetNodeInformation(
+			string identifier,
+			[Service] ISwarmService swarmService)
+		{
+			ArgumentNullException.ThrowIfNull(identifier);
+			ArgumentNullException.ThrowIfNull(swarmService);
+
+			var node = swarmService.GetSwarmServers()
+				?.FirstOrDefault(node => node.Identifier == identifier);
+			if (node == null)
+				return null;
+
+			return new NodeInformation(node);
+		}
+
 		/// <summary>
 		/// The swarm server ID.
 		/// </summary>

src/Tgstation.Server.Host/GraphQL/Types/PermissionSet.cs

@@ -1,10 +1,15 @@
-using Tgstation.Server.Api.Rights;
+using System.Diagnostics.CodeAnalysis;
+
+using HotChocolate.Types.Relay;
+
+using Tgstation.Server.Api.Rights;
 
 namespace Tgstation.Server.Host.GraphQL.Types
 {
 	/// <summary>
 	/// Represents a set of permissions for the server.
 	/// </summary>
+	[Node]
 	public sealed class PermissionSet : Entity
 	{
 		/// <summary>
@@ -23,6 +28,7 @@ namespace Tgstation.Server.Host.GraphQL.Types
 		/// <param name="id">The <see cref="Entity.Id"/>.</param>
 		/// <param name="administrationRights">The value of <see cref="AdministrationRights"/>.</param>
 		/// <param name="instanceManagerRights">The value of <see cref="InstanceManagerRights"/>.</param>
+		[SetsRequiredMembers]
 		public PermissionSet(long id, AdministrationRights administrationRights, InstanceManagerRights instanceManagerRights)
 			: base(id)
 		{

src/Tgstation.Server.Host/GraphQL/Types/RemoteGateway.cs

@@ -14,7 +14,7 @@ using Tgstation.Server.Host.System;
 namespace Tgstation.Server.Host.GraphQL.Types
 {
 	/// <summary>
-	/// <see cref="IGateway"/> for accessing remote <see cref="Node"/>s.
+	/// <see cref="IGateway"/> for accessing remote <see cref="SwarmNode"/>s.
 	/// </summary>
 	/// <remarks>This is currently unimplemented.</remarks>
 	public sealed class RemoteGateway : IGateway

src/Tgstation.Server.Host/GraphQL/Types/ServerSwarm.cs

@@ -40,12 +40,12 @@ namespace Tgstation.Server.Host.GraphQL.Types
 		public Users Users() => new();
 
 		/// <summary>
-		/// Gets the connected <see cref="Node"/> server.
+		/// Gets the connected <see cref="SwarmNode"/> server.
 		/// </summary>
 		/// <param name="swarmService">The <see cref="ISwarmService"/> to use.</param>
 		/// <param name="swarmConfigurationOptions">The <see cref="IOptionsSnapshot{TOptions}"/> containing the current <see cref="SwarmConfiguration"/>.</param>
-		/// <returns>A new <see cref="Node"/>.</returns>
-		public Node CurrentNode(
+		/// <returns>A new <see cref="SwarmNode"/>.</returns>
+		public SwarmNode CurrentNode(
 			[Service] ISwarmService swarmService,
 			[Service] IOptionsSnapshot<SwarmConfiguration> swarmConfigurationOptions)
 		{
@@ -56,19 +56,19 @@ namespace Tgstation.Server.Host.GraphQL.Types
 			if (nodeInfos != null)
 				return nodeInfos.First(x => x.Info!.Identifier == swarmConfigurationOptions.Value.Identifier);
 
-			return new Node(null);
+			return new SwarmNode(null);
 		}
 
 		/// <summary>
-		/// Gets all <see cref="Node"/> servers in the swarm.
+		/// Gets all <see cref="SwarmNode"/> servers in the swarm.
 		/// </summary>
 		/// <param name="swarmService">The <see cref="ISwarmService"/> to use.</param>
-		/// <returns>A <see cref="List{T}"/> of <see cref="Node"/>s if the local server is part of a swarm, <see langword="null"/> otherwise.</returns>
-		public List<Node>? Nodes(
+		/// <returns>A <see cref="List{T}"/> of <see cref="SwarmNode"/>s if the local server is part of a swarm, <see langword="null"/> otherwise.</returns>
+		public List<SwarmNode>? Nodes(
 			[Service] ISwarmService swarmService)
 		{
 			ArgumentNullException.ThrowIfNull(swarmService);
-			return swarmService.GetSwarmServers()?.Select(x => new Node(new NodeInformation(x))).ToList();
+			return swarmService.GetSwarmServers()?.Select(x => new SwarmNode(new NodeInformation(x))).ToList();
 		}
 	}
 }

src/Tgstation.Server.Host/GraphQL/Types/SwarmNode.cs

@@ -12,7 +12,7 @@ namespace Tgstation.Server.Host.GraphQL.Types
 	/// <summary>
 	/// Represents a node server in a swarm.
 	/// </summary>
-	public sealed class Node
+	public sealed class SwarmNode
 	{
 		/// <summary>
 		/// Gets the <see cref="NodeInformation"/>.
@@ -20,20 +20,20 @@ namespace Tgstation.Server.Host.GraphQL.Types
 		public NodeInformation? Info { get; }
 
 		/// <summary>
-		/// Initializes a new instance of the <see cref="Node"/> class.
+		/// Initializes a new instance of the <see cref="SwarmNode"/> class.
 		/// </summary>
 		/// <param name="info">The value of <see cref="Info"/>.</param>
-		public Node(NodeInformation? info)
+		public SwarmNode(NodeInformation? info)
 		{
 			Info = info;
 		}
 
 		/// <summary>
-		/// Gets the <see cref="Node"/>'s <see cref="IGateway"/>.
+		/// Gets the <see cref="SwarmNode"/>'s <see cref="IGateway"/>.
 		/// </summary>
 		/// <param name="swarmConfigurationOptions">The <see cref="IOptionsSnapshot{TOptions}"/> containing the current <see cref="SwarmConfiguration"/>.</param>
 		/// <returns>A new <see cref="IGateway"/>.</returns>
-		/// <remarks>The <see cref="Node"/>'s <see cref="IGateway"/>.</remarks>
+		/// <remarks>The <see cref="SwarmNode"/>'s <see cref="IGateway"/>.</remarks>
 		public IGateway? Gateway([Service] IOptionsSnapshot<SwarmConfiguration> swarmConfigurationOptions)
 		{
 			ArgumentNullException.ThrowIfNull(swarmConfigurationOptions);

src/Tgstation.Server.Host/GraphQL/Types/User.cs

@@ -4,76 +4,61 @@ using System.Threading;
 using System.Threading.Tasks;
 
 using HotChocolate;
+using HotChocolate.Types.Relay;
 
 using Tgstation.Server.Host.Authority;
 using Tgstation.Server.Host.Authority.Core;
 using Tgstation.Server.Host.GraphQL.Interfaces;
+using Tgstation.Server.Host.Models.Transformers;
 
 namespace Tgstation.Server.Host.GraphQL.Types
 {
 	/// <summary>
 	/// A user registered in the server.
 	/// </summary>
+	[Node]
 	public sealed class User : NamedEntity, IUserName
 	{
 		/// <summary>
 		/// If the <see cref="User"/> is enabled since users cannot be deleted. System users cannot be disabled.
 		/// </summary>
-		public bool Enabled { get; }
+		public required bool Enabled { get; init; }
 
 		/// <summary>
 		/// The user's canonical (Uppercase) name.
 		/// </summary>
-		public string CanonicalName { get; }
+		public required string CanonicalName { get; init; }
 
 		/// <summary>
 		/// When the <see cref="User"/> was created.
 		/// </summary>
-		public DateTimeOffset CreatedAt { get; }
+		public required DateTimeOffset CreatedAt { get; init; }
 
 		/// <summary>
 		/// The SID/UID of the <see cref="User"/> on Windows/POSIX respectively.
 		/// </summary>
-		public string? SystemIdentifier { get; }
+		public required string? SystemIdentifier { get; init; }
 
 		/// <summary>
 		/// The <see cref="Entity.Id"/> of the <see cref="CreatedBy"/> <see cref="User"/>.
 		/// </summary>
-		readonly long? createdById;
+		[GraphQLIgnore]
+		public required long? CreatedById { get; init; }
 
 		/// <summary>
 		/// The <see cref="Entity.Id"/> of the <see cref="Group"/>.
 		/// </summary>
-		readonly long? groupId;
+		[GraphQLIgnore]
+		public required long? GroupId { get; init; }
 
-		/// <summary>
-		/// Initializes a new instance of the <see cref="User"/> class.
-		/// </summary>
-		/// <param name="id">The <see cref="Entity.Id"/>.</param>
-		/// <param name="name">The <see cref="NamedEntity.Name"/>.</param>
-		/// <param name="canonicalName">The value of <see cref="CanonicalName"/>.</param>
-		/// <param name="systemIdentifier">The value of <see cref="SystemIdentifier"/>.</param>
-		/// <param name="createdAt">The value of <see cref="CreatedAt"/>.</param>
-		/// <param name="createdById">The value of <see cref="createdById"/>.</param>
-		/// <param name="groupId">The value of <see cref="groupId"/>.</param>
-		/// <param name="enabled">The value of <see cref="Enabled"/>.</param>
-		public User(
+		public static ValueTask<User> GetUser(
 			long id,
-			string name,
-			string canonicalName,
-			string? systemIdentifier,
-			DateTimeOffset createdAt,
-			long? createdById,
-			long? groupId,
-			bool enabled)
-			: base(id, name)
+			[Service] IGraphQLAuthorityInvoker<IUserAuthority> authorityInvoker,
+			CancellationToken cancellationToken)
 		{
-			SystemIdentifier = systemIdentifier;
-			CanonicalName = canonicalName ?? throw new ArgumentNullException(nameof(canonicalName));
-			CreatedAt = createdAt;
-			this.createdById = createdById;
-			Enabled = enabled;
-			this.groupId = groupId;
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+			return authorityInvoker.InvokeTransformable<Models.User, User, UserGraphQLTransformer>(
+				authority => authority.GetId(id, false, false, cancellationToken));
 		}
 
 		/// <summary>
@@ -87,10 +72,10 @@ namespace Tgstation.Server.Host.GraphQL.Types
 			CancellationToken cancellationToken)
 		{
 			ArgumentNullException.ThrowIfNull(userAuthority);
-			if (!createdById.HasValue)
+			if (!CreatedById.HasValue)
 				return null;
 
-			var user = await userAuthority.InvokeTransformable<Models.User, User>(authority => authority.GetId(createdById.Value, false, true, cancellationToken));
+			var user = await userAuthority.InvokeTransformable<Models.User, User, UserGraphQLTransformer>(authority => authority.GetId(CreatedById.Value, false, true, cancellationToken));
 			if (user.CanonicalName == Models.User.CanonicalizeName(Models.User.TgsSystemUserName))
 				return new UserName(user);
 

src/Tgstation.Server.Host/GraphQL/Types/UserGroup.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Threading.Tasks;
 
 using HotChocolate.Types;
@@ -22,6 +23,7 @@ namespace Tgstation.Server.Host.GraphQL.Types
 		/// <param name="id">The <see cref="Entity.Id"/>.</param>
 		/// <param name="name">The <see cref="NamedEntity.Name"/>.</param>
 		/// <param name="permissionSetId">The value of <see cref="permissionSetId"/>.</param>
+		[SetsRequiredMembers]
 		public UserGroup(
 			long id,
 			string name,

src/Tgstation.Server.Host/GraphQL/Types/UserName.cs

@@ -1,16 +1,41 @@
-using Tgstation.Server.Host.GraphQL.Interfaces;
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Threading;
+using System.Threading.Tasks;
+
+using HotChocolate;
+using HotChocolate.Types.Relay;
+
+using Tgstation.Server.Host.Authority;
+using Tgstation.Server.Host.Authority.Core;
+using Tgstation.Server.Host.GraphQL.Interfaces;
+using Tgstation.Server.Host.Models.Transformers;
 
 namespace Tgstation.Server.Host.GraphQL.Types
 {
 	/// <summary>
 	/// A <see cref="User"/> with limited fields.
 	/// </summary>
+	[Node]
 	public sealed class UserName : NamedEntity, IUserName
 	{
+		public static async ValueTask<UserName> GetUserName(
+			long id,
+			[Service] IGraphQLAuthorityInvoker<IUserAuthority> authorityInvoker,
+			CancellationToken cancellationToken)
+		{
+			ArgumentNullException.ThrowIfNull(authorityInvoker);
+			var user = await authorityInvoker.InvokeTransformable<Models.User, User, UserGraphQLTransformer>(
+				authority => authority.GetId(id, false, true, cancellationToken));
+
+			return new UserName(user);
+		}
+
 		/// <summary>
 		/// Initializes a new instance of the <see cref="UserName"/> class.
 		/// </summary>
 		/// <param name="copy">The <see cref="NamedEntity"/> to copy.</param>
+		[SetsRequiredMembers]
 		public UserName(NamedEntity copy)
 			: base(copy)
 		{

src/Tgstation.Server.Host/GraphQL/Types/Users.cs

@@ -4,12 +4,13 @@ using System.Threading;
 using System.Threading.Tasks;
 
 using HotChocolate;
+using HotChocolate.Data;
 using HotChocolate.Types;
 using HotChocolate.Types.Relay;
 
 using Tgstation.Server.Host.Authority;
 using Tgstation.Server.Host.Authority.Core;
-using Tgstation.Server.Host.Models;
+using Tgstation.Server.Host.Models.Transformers;
 using Tgstation.Server.Host.Security;
 
 #pragma warning disable CA1724 // conflict with GitLabApiClient.Models.Users. They can fuck off
@@ -33,7 +34,7 @@ namespace Tgstation.Server.Host.GraphQL.Types
 			CancellationToken cancellationToken)
 		{
 			ArgumentNullException.ThrowIfNull(userAuthority);
-			return userAuthority.InvokeTransformable<Models.User, User>(authority => authority.Read(cancellationToken));
+			return userAuthority.InvokeTransformable<Models.User, User, UserGraphQLTransformer>(authority => authority.Read(cancellationToken));
 		}
 
 		/// <summary>
@@ -49,26 +50,23 @@ namespace Tgstation.Server.Host.GraphQL.Types
 			[ID(nameof(User))] long id,
 			[Service] IGraphQLAuthorityInvoker<IUserAuthority> userAuthority,
 			CancellationToken cancellationToken)
-		{
-			ArgumentNullException.ThrowIfNull(userAuthority);
-			return await userAuthority.InvokeTransformable<Models.User, User>(authority => authority.GetId(id, false, false, cancellationToken));
-		}
+			=> await User.GetUser(id, userAuthority, cancellationToken);
 
 		/// <summary>
 		/// Lists all registered <see cref="User"/>s.
 		/// </summary>
 		/// <param name="userAuthority">The <see cref="IGraphQLAuthorityInvoker{TAuthority}"/> <see cref="IUserAuthority"/>.</param>
 		/// <returns>A list of all registered <see cref="User"/>s.</returns>
-		[UsePaging(IncludeTotalCount = true)]
-		[TgsGraphQLAuthorize<IUserAuthority>(nameof(IUserAuthority.List))]
-		public async ValueTask<IQueryable<User?>> List(
+		[UsePaging]
+		[UseFiltering]
+		[UseSorting]
+		[TgsGraphQLAuthorize<IUserAuthority>(nameof(IUserAuthority.Queryable))]
+		public IQueryable<User>? Queryable(
 			[Service] IGraphQLAuthorityInvoker<IUserAuthority> userAuthority)
 		{
 			ArgumentNullException.ThrowIfNull(userAuthority);
-			var dtoQueryable = await userAuthority.Invoke<IQueryable<Models.User>, IQueryable<Models.User>>(authority => authority.List(false));
-			return dtoQueryable
-				.Cast<IApiTransformable<User>>()
-				.Select(dto => dto.ToApi());
+			var dtoQueryable = userAuthority.InvokeTransformableQueryable<Models.User, User, UserGraphQLTransformer>(authority => authority.Queryable(false));
+			return dtoQueryable;
 		}
 	}
 }

src/Tgstation.Server.Host/Models/ChatBot.cs

@@ -8,7 +8,7 @@ using Tgstation.Server.Api.Models.Response;
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.ChatBotSettings" />
-	public sealed class ChatBot : Api.Models.Internal.ChatBotSettings, IApiTransformable<ChatBotResponse>
+	public sealed class ChatBot : Api.Models.Internal.ChatBotSettings, ILegacyApiTransformable<ChatBotResponse>
 	{
 		/// <summary>
 		/// Default for <see cref="Api.Models.Internal.ChatBotSettings.ChannelLimit"/>.

src/Tgstation.Server.Host/Models/CompileJob.cs

@@ -7,7 +7,7 @@ using Tgstation.Server.Api.Models.Response;
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.CompileJob" />
-	public sealed class CompileJob : Api.Models.Internal.CompileJob, IApiTransformable<CompileJobResponse>
+	public sealed class CompileJob : Api.Models.Internal.CompileJob, ILegacyApiTransformable<CompileJobResponse>
 	{
 		/// <summary>
 		/// See <see cref="CompileJobResponse.Job"/>.

src/Tgstation.Server.Host/Models/DreamMakerSettings.cs

@@ -5,7 +5,7 @@ using Tgstation.Server.Api.Models.Response;
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.DreamMakerSettings" />
-	public sealed class DreamMakerSettings : Api.Models.Internal.DreamMakerSettings, IApiTransformable<DreamMakerResponse>
+	public sealed class DreamMakerSettings : Api.Models.Internal.DreamMakerSettings, ILegacyApiTransformable<DreamMakerResponse>
 	{
 		/// <summary>
 		/// The row Id.

src/Tgstation.Server.Host/Models/IApiTransformable{TModel,TApiModel,TTransformer}.cs

@@ -0,0 +1,25 @@
+using System;
+
+#pragma warning disable CA1005
+
+namespace Tgstation.Server.Host.Models
+{
+	/// <summary>
+	/// Represents a host-side model that may be transformed into a <typeparamref name="TApiModel"/>.
+	/// </summary>
+	/// <typeparam name="TModel">The internal model <see cref="Type"/>.</typeparam>
+	/// <typeparam name="TApiModel">The API model <see cref="Type"/>.</typeparam>
+	/// <typeparam name="TTransformer">The <see cref="ITransformer{TModel, TApiModel}"/> <see cref="Type"/>.</typeparam>
+	public interface IApiTransformable<TModel, TApiModel, TTransformer>
+		where TModel : IApiTransformable<TModel, TApiModel, TTransformer>
+		where TTransformer : ITransformer<TModel, TApiModel>, new()
+	{
+		/// <summary>
+		/// Convert the <see cref="IApiTransformable{TModel, TApiModel, TApiTransformer}"/> to it's <typeparamref name="TApiModel"/>.
+		/// </summary>
+		/// <returns>A new <typeparamref name="TApiModel"/> based on the <see cref="IApiTransformable{TModel, TApiModel, TApiTransformer}"/>.</returns>
+		TApiModel ToApi()
+			=> new TTransformer()
+				.CompiledExpression((TModel)this);
+	}
+}

src/Tgstation.Server.Host/Models/ILegacyApiTransformable{TApiModel}.cs

@@ -4,12 +4,12 @@
 	/// Represents a host-side model that may be transformed into a <typeparamref name="TApiModel"/>.
 	/// </summary>
 	/// <typeparam name="TApiModel">The API form of the model.</typeparam>
-	public interface IApiTransformable<TApiModel>
+	public interface ILegacyApiTransformable<out TApiModel>
 	{
 		/// <summary>
-		/// Convert the <see cref="IApiTransformable{TApiModel}"/> to it's <typeparamref name="TApiModel"/>.
+		/// Convert the <see cref="ILegacyApiTransformable{TApiModel}"/> to it's <typeparamref name="TApiModel"/>.
 		/// </summary>
-		/// <returns>A new <typeparamref name="TApiModel"/> based on the <see cref="IApiTransformable{TApiModel}"/>.</returns>
+		/// <returns>A new <typeparamref name="TApiModel"/> based on the <see cref="ILegacyApiTransformable{TApiModel}"/>.</returns>
 		TApiModel ToApi();
 	}
 }

src/Tgstation.Server.Host/Models/ITransformer{TInput,TOutput}.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Linq.Expressions;
+
+namespace Tgstation.Server.Host.Models
+{
+	/// <summary>
+	/// Contains a transformation <see cref="Expression"/> for converting <typeparamref name="TInput"/>s to <typeparamref name="TOutput"/>s.
+	/// </summary>
+	/// <typeparam name="TInput">The input <see cref="Type"/>.</typeparam>
+	/// <typeparam name="TOutput">The output <see cref="Type"/>.</typeparam>
+	public interface ITransformer<TInput, TOutput>
+	{
+		/// <summary>
+		/// <see cref="Expression{TDelegate}"/> form of the transformation.
+		/// </summary>
+		Expression<Func<TInput, TOutput>> Expression { get; }
+
+		/// <summary>
+		/// The compiled <see cref="Expression"/>.
+		/// </summary>
+		Func<TInput, TOutput> CompiledExpression { get; }
+	}
+}

src/Tgstation.Server.Host/Models/Instance.cs

@@ -7,7 +7,7 @@ namespace Tgstation.Server.Host.Models
 	/// <summary>
 	/// Represents an <see cref="Api.Models.Instance"/> in the database.
 	/// </summary>
-	public sealed class Instance : Api.Models.Instance, IApiTransformable<InstanceResponse>
+	public sealed class Instance : Api.Models.Instance, ILegacyApiTransformable<InstanceResponse>
 	{
 		/// <summary>
 		/// Default for <see cref="Api.Models.Instance.ChatBotLimit"/>.

src/Tgstation.Server.Host/Models/InstancePermissionSet.cs

@@ -5,7 +5,7 @@ using Tgstation.Server.Api.Models.Response;
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.InstancePermissionSet" />
-	public sealed class InstancePermissionSet : Api.Models.Internal.InstancePermissionSet, IApiTransformable<InstancePermissionSetResponse>
+	public sealed class InstancePermissionSet : Api.Models.Internal.InstancePermissionSet, ILegacyApiTransformable<InstancePermissionSetResponse>
 	{
 		/// <summary>
 		/// The row Id.

src/Tgstation.Server.Host/Models/Job.cs

@@ -11,7 +11,7 @@ namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.Job" />
 #pragma warning disable CA1724 // naming conflict with gitlab package
-	public sealed class Job : Api.Models.Internal.Job, IApiTransformable<JobResponse>
+	public sealed class Job : Api.Models.Internal.Job, ILegacyApiTransformable<JobResponse>
 #pragma warning restore CA1724
 	{
 		/// <summary>

src/Tgstation.Server.Host/Models/OAuthConnection.cs

@@ -1,7 +1,7 @@
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.OAuthConnection" />
-	public sealed class OAuthConnection : Api.Models.OAuthConnection, IApiTransformable<Api.Models.OAuthConnection>
+	public sealed class OAuthConnection : Api.Models.OAuthConnection, ILegacyApiTransformable<Api.Models.OAuthConnection>
 	{
 		/// <summary>
 		/// The row Id.

src/Tgstation.Server.Host/Models/RepositorySettings.cs

@@ -5,7 +5,7 @@ using Tgstation.Server.Api.Models.Response;
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.RepositorySettings" />
-	public sealed class RepositorySettings : Api.Models.RepositorySettings, IApiTransformable<RepositoryResponse>
+	public sealed class RepositorySettings : Api.Models.RepositorySettings, ILegacyApiTransformable<RepositoryResponse>
 	{
 		/// <summary>
 		/// The row Id.

src/Tgstation.Server.Host/Models/RevisionInformation.cs

@@ -6,7 +6,7 @@ using System.Linq;
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.RevisionInformation" />
-	public sealed class RevisionInformation : Api.Models.Internal.RevisionInformation, IApiTransformable<Api.Models.RevisionInformation>
+	public sealed class RevisionInformation : Api.Models.Internal.RevisionInformation, ILegacyApiTransformable<Api.Models.RevisionInformation>
 	{
 		/// <summary>
 		/// The row Id.

src/Tgstation.Server.Host/Models/TestMerge.cs

@@ -5,7 +5,7 @@ using System.ComponentModel.DataAnnotations;
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.TestMergeApiBase" />
-	public sealed class TestMerge : Api.Models.Internal.TestMergeApiBase, IApiTransformable<Api.Models.TestMerge>
+	public sealed class TestMerge : Api.Models.Internal.TestMergeApiBase, ILegacyApiTransformable<Api.Models.TestMerge>
 	{
 		/// <summary>
 		/// See <see cref="Api.Models.TestMerge.MergedBy"/>.

src/Tgstation.Server.Host/Models/Transformers/TransformerBase{TModel,TApiModel}.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Linq.Expressions;
+
+namespace Tgstation.Server.Host.Models.Transformers
+{
+	/// <inheritdoc />
+	abstract class TransformerBase<TInput, TOutput> : ITransformer<TInput, TOutput>
+	{
+		/// <summary>
+		/// <see langword="static"/> cache for <see cref="CompiledExpression"/>.
+		/// </summary>
+		static Func<TInput, TOutput>? compiledExpression;
+
+		/// <inheritdoc />
+		public Expression<Func<TInput, TOutput>> Expression { get; }
+
+		/// <inheritdoc />
+		public Func<TInput, TOutput> CompiledExpression { get; }
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="TransformerBase{TInput, TOutput}"/> class.
+		/// </summary>
+		/// <param name="expression">The value of <see cref="Expression"/>.</param>
+		protected TransformerBase(
+			Expression<Func<TInput, TOutput>> expression)
+		{
+			compiledExpression ??= expression.Compile();
+			Expression = expression;
+			CompiledExpression = compiledExpression;
+		}
+	}
+}

src/Tgstation.Server.Host/Models/Transformers/UserGraphQLTransformer.cs

@@ -0,0 +1,26 @@
+namespace Tgstation.Server.Host.Models.Transformers
+{
+	/// <summary>
+	/// <see cref="ITransformer{TInput, TOutput}"/> for <see cref="GraphQL.Types.User"/>s.
+	/// </summary>
+	sealed class UserGraphQLTransformer : TransformerBase<User, GraphQL.Types.User>
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="UserGraphQLTransformer"/> class.
+		/// </summary>
+		public UserGraphQLTransformer()
+			: base(model => new GraphQL.Types.User
+			{
+				CreatedAt = model.CreatedAt!.Value,
+				CanonicalName = model.CanonicalName!,
+				CreatedById = model.CreatedById,
+				Enabled = model.Enabled!.Value,
+				GroupId = model.GroupId,
+				Id = model.Id!.Value,
+				Name = model.Name!,
+				SystemIdentifier = model.SystemIdentifier,
+			})
+		{
+		}
+	}
+}

src/Tgstation.Server.Host/Models/User.cs

@@ -5,11 +5,14 @@ using System.Linq;
 
 using Tgstation.Server.Api.Models;
 using Tgstation.Server.Api.Models.Response;
+using Tgstation.Server.Host.Models.Transformers;
 
 namespace Tgstation.Server.Host.Models
 {
 	/// <inheritdoc cref="Api.Models.Internal.UserModelBase" />
-	public sealed class User : Api.Models.Internal.UserModelBase, IApiTransformable<UserResponse>, IApiTransformable<GraphQL.Types.User>
+	public sealed class User : Api.Models.Internal.UserModelBase,
+		ILegacyApiTransformable<UserResponse>,
+		IApiTransformable<User, GraphQL.Types.User, UserGraphQLTransformer>
 	{
 		/// <summary>
 		/// Username used when creating jobs automatically.
@@ -83,18 +86,6 @@ namespace Tgstation.Server.Host.Models
 		/// <inheritdoc />
 		public UserResponse ToApi() => CreateUserResponse(true);
 
-		/// <inheritdoc />
-		GraphQL.Types.User IApiTransformable<GraphQL.Types.User>.ToApi()
-			=> new(
-				Id!.Value,
-				Name!,
-				CanonicalName!,
-				SystemIdentifier,
-				CreatedAt!.Value,
-				CreatedById,
-				GroupId,
-				Enabled!.Value);
-
 		/// <summary>
 		/// Generate a <see cref="UserResponse"/> from <see langword="this"/>.
 		/// </summary>

src/Tgstation.Server.Host/Models/UserGroup.cs

@@ -11,7 +11,7 @@ namespace Tgstation.Server.Host.Models
 	/// <summary>
 	/// Represents a group of <see cref="User"/>s.
 	/// </summary>
-	public sealed class UserGroup : NamedEntity, IApiTransformable<UserGroupResponse>
+	public sealed class UserGroup : NamedEntity, ILegacyApiTransformable<UserGroupResponse>
 	{
 		/// <summary>
 		/// The <see cref="Models.PermissionSet"/> the <see cref="UserGroup"/> has.

src/Tgstation.Server.Host/Properties/AssemblyInfo.cs

@@ -1,6 +1,10 @@
 using System.Runtime.CompilerServices;
 
+using GreenDonut;
+
 [assembly: InternalsVisibleTo("Tgstation.Server.Host.Tests")]
 [assembly: InternalsVisibleTo("Tgstation.Server.Host.Tests.Signals")]
 [assembly: InternalsVisibleTo("Tgstation.Server.Tests")]
 [assembly: InternalsVisibleTo("DynamicProxyGenAssembly2")]
+
+[assembly: DataLoaderDefaults(AccessModifier = DataLoaderAccessModifier.Internal)]

src/Tgstation.Server.Host/Tgstation.Server.Host.csproj

@@ -100,11 +100,15 @@
     <!-- Usage: GitLab interop -->
     <PackageReference Include="GitLabApiClient" Version="1.8.0" />
     <!-- Usage: GraphQL API Engine -->
-    <PackageReference Include="HotChocolate.AspNetCore" Version="13.9.12" />
+    <PackageReference Include="HotChocolate.AspNetCore" Version="14.0.0-rc.1" />
     <!-- Usage: GraphQL Authorization Plugin -->
-    <PackageReference Include="HotChocolate.AspNetCore.Authorization" Version="13.9.12" />
+    <PackageReference Include="HotChocolate.AspNetCore.Authorization" Version="14.0.0-rc.1" />
+    <!-- Usage: GraphQL IDatabaseContext support -->
+    <PackageReference Include="HotChocolate.Data.EntityFramework" Version="14.0.0-rc.1" />
+    <!-- Usage: DataLoader source generation -->
+    <PackageReference Include="HotChocolate.Types.Analyzers" Version="14.0.0-rc.1" />
     <!-- Usage: GraphQL additional scalar type definitions -->
-    <PackageReference Include="HotChocolate.Types.Scalars" Version="13.9.12" />
+    <PackageReference Include="HotChocolate.Types.Scalars" Version="14.0.0-rc.1" />
     <!-- Usage: git interop -->
     <PackageReference Include="LibGit2Sharp" Version="0.30.0" />
     <!-- Usage: Support ""legacy"" Newotonsoft.Json in HTTP pipeline. The rest of our codebase uses Newtonsoft. -->