backend/src/Tnsu.ApprovalRoute.Api/Controllers/RequestTypesController.cs

@@ -16,10 +16,10 @@ public sealed class RequestTypesController(RequestTypeService service) : Control
     public async Task<IActionResult> List(CancellationToken ct) =>
         (await service.ListAsync(ct)).ToActionResult();
 
-    [HttpGet("{id:guid}")]
+    [HttpGet("{id:int}")]
     [ProducesResponseType(typeof(ApiResponse<RequestTypeDto>), StatusCodes.Status200OK)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Get(Guid id, CancellationToken ct) =>
+    public async Task<IActionResult> Get(int id, CancellationToken ct) =>
         (await service.GetAsync(id, ct)).ToActionResult();
 
     [HttpPost]
@@ -28,16 +28,16 @@ public sealed class RequestTypesController(RequestTypeService service) : Control
     public async Task<IActionResult> Create(CreateRequestTypeRequest body, CancellationToken ct) =>
         (await service.CreateAsync(body, ct)).ToActionResult();
 
-    [HttpPut("{id:guid}")]
+    [HttpPut("{id:int}")]
     [ProducesResponseType(typeof(ApiResponse<RequestTypeDto>), StatusCodes.Status200OK)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status400BadRequest)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Update(Guid id, UpdateRequestTypeRequest body, CancellationToken ct) =>
+    public async Task<IActionResult> Update(int id, UpdateRequestTypeRequest body, CancellationToken ct) =>
         (await service.UpdateAsync(id, body, ct)).ToActionResult();
 
-    [HttpDelete("{id:guid}")]
+    [HttpDelete("{id:int}")]
     [ProducesResponseType(StatusCodes.Status204NoContent)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Delete(Guid id, CancellationToken ct) =>
+    public async Task<IActionResult> Delete(int id, CancellationToken ct) =>
         (await service.DeleteAsync(id, ct)).ToActionResult();
 }

backend/src/Tnsu.ApprovalRoute.Api/Controllers/TemplateRouteStepsController.cs

@@ -7,38 +7,38 @@ namespace Tnsu.ApprovalRoute.Api.Controllers;
 
 [ApiController]
 [Authorize]
-[Route("api/template-routes/{routeId:guid}/steps")]
+[Route("api/template-routes/{routeId:int}/steps")]
 [Produces("application/json")]
 public sealed class TemplateRouteStepsController(TemplateRouteStepService service) : ControllerBase
 {
     [HttpGet]
     [ProducesResponseType(typeof(ApiResponse<IReadOnlyList<TemplateRouteStepDto>>), StatusCodes.Status200OK)]
-    public async Task<IActionResult> List(Guid routeId, CancellationToken ct) =>
+    public async Task<IActionResult> List(int routeId, CancellationToken ct) =>
         (await service.ListAsync(routeId, ct)).ToActionResult();
 
-    [HttpGet("{id:guid}")]
+    [HttpGet("{id:int}")]
     [ProducesResponseType(typeof(ApiResponse<TemplateRouteStepDto>), StatusCodes.Status200OK)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Get(Guid routeId, Guid id, CancellationToken ct) =>
+    public async Task<IActionResult> Get(int routeId, int id, CancellationToken ct) =>
         (await service.GetAsync(routeId, id, ct)).ToActionResult();
 
     [HttpPost]
     [ProducesResponseType(typeof(ApiResponse<TemplateRouteStepDto>), StatusCodes.Status200OK)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status400BadRequest)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Create(Guid routeId, CreateTemplateRouteStepRequest body, CancellationToken ct) =>
+    public async Task<IActionResult> Create(int routeId, CreateTemplateRouteStepRequest body, CancellationToken ct) =>
         (await service.CreateAsync(routeId, body, ct)).ToActionResult();
 
-    [HttpPut("{id:guid}")]
+    [HttpPut("{id:int}")]
     [ProducesResponseType(typeof(ApiResponse<TemplateRouteStepDto>), StatusCodes.Status200OK)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status400BadRequest)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Update(Guid routeId, Guid id, UpdateTemplateRouteStepRequest body, CancellationToken ct) =>
+    public async Task<IActionResult> Update(int routeId, int id, UpdateTemplateRouteStepRequest body, CancellationToken ct) =>
         (await service.UpdateAsync(routeId, id, body, ct)).ToActionResult();
 
-    [HttpDelete("{id:guid}")]
+    [HttpDelete("{id:int}")]
     [ProducesResponseType(StatusCodes.Status204NoContent)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Delete(Guid routeId, Guid id, CancellationToken ct) =>
+    public async Task<IActionResult> Delete(int routeId, int id, CancellationToken ct) =>
         (await service.DeleteAsync(routeId, id, ct)).ToActionResult();
 }

backend/src/Tnsu.ApprovalRoute.Api/Controllers/TemplateRoutesController.cs

@@ -20,13 +20,13 @@ public sealed class TemplateRoutesController(TemplateRouteService service) : Con
 
     [HttpGet]
     [ProducesResponseType(typeof(ApiResponse<IReadOnlyList<TemplateRouteDto>>), StatusCodes.Status200OK)]
-    public async Task<IActionResult> List([FromQuery] Guid? requestTypeId, CancellationToken ct) =>
+    public async Task<IActionResult> List([FromQuery] int? requestTypeId, CancellationToken ct) =>
         (await service.ListAsync(requestTypeId, ct)).ToActionResult();
 
-    [HttpGet("{id:guid}")]
+    [HttpGet("{id:int}")]
     [ProducesResponseType(typeof(ApiResponse<TemplateRouteDto>), StatusCodes.Status200OK)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Get(Guid id, CancellationToken ct) =>
+    public async Task<IActionResult> Get(int id, CancellationToken ct) =>
         (await service.GetAsync(id, ct)).ToActionResult();
 
     [HttpPost]
@@ -37,17 +37,17 @@ public sealed class TemplateRoutesController(TemplateRouteService service) : Con
     public async Task<IActionResult> Create(CreateTemplateRouteRequest body, CancellationToken ct) =>
         (await service.CreateAsync(body, ct)).ToActionResult();
 
-    [HttpPut("{id:guid}")]
+    [HttpPut("{id:int}")]
     [ProducesResponseType(typeof(ApiResponse<TemplateRouteDto>), StatusCodes.Status200OK)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status400BadRequest)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status409Conflict)]
-    public async Task<IActionResult> Update(Guid id, UpdateTemplateRouteRequest body, CancellationToken ct) =>
+    public async Task<IActionResult> Update(int id, UpdateTemplateRouteRequest body, CancellationToken ct) =>
         (await service.UpdateAsync(id, body, ct)).ToActionResult();
 
-    [HttpDelete("{id:guid}")]
+    [HttpDelete("{id:int}")]
     [ProducesResponseType(StatusCodes.Status204NoContent)]
     [ProducesResponseType(typeof(ApiError), StatusCodes.Status404NotFound)]
-    public async Task<IActionResult> Delete(Guid id, CancellationToken ct) =>
+    public async Task<IActionResult> Delete(int id, CancellationToken ct) =>
         (await service.DeleteAsync(id, ct)).ToActionResult();
 }

backend/src/Tnsu.ApprovalRoute.Application/Common/Errors/ApiErrors.cs

@@ -2,7 +2,7 @@ using FluentResults;
 
 namespace Tnsu.ApprovalRoute.Application.Common.Errors;
 
-public sealed class NotFoundError(string entity, Guid id)
+public sealed class NotFoundError(string entity, object id)
     : Error($"{entity} с id {id} не найден.");
 
 public sealed class ValidationError(string message) : Error(message);

backend/src/Tnsu.ApprovalRoute.Application/RequestTypes/RequestTypeDto.cs

@@ -1,6 +1,6 @@
 namespace Tnsu.ApprovalRoute.Application.RequestTypes;
 
-public sealed record RequestTypeDto(Guid Id, string Name, string PageUrl);
+public sealed record RequestTypeDto(int Id, string Name, string PageUrl);
 
 public sealed record CreateRequestTypeRequest(string Name, string PageUrl);
 

backend/src/Tnsu.ApprovalRoute.Application/RequestTypes/RequestTypeService.cs

@@ -18,7 +18,7 @@ public sealed class RequestTypeService(ApprovalRouteDbContext db)
         return Result.Ok<IReadOnlyList<RequestTypeDto>>(items);
     }
 
-    public async Task<Result<RequestTypeDto>> GetAsync(Guid id, CancellationToken cancellationToken)
+    public async Task<Result<RequestTypeDto>> GetAsync(int id, CancellationToken cancellationToken)
     {
         var entity = await db.RequestTypes.AsNoTracking().FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
 
@@ -36,7 +36,7 @@ public sealed class RequestTypeService(ApprovalRouteDbContext db)
         return Result.Ok(ToDto(entity));
     }
 
-    public async Task<Result<RequestTypeDto>> UpdateAsync(Guid id, UpdateRequestTypeRequest request, CancellationToken cancellationToken)
+    public async Task<Result<RequestTypeDto>> UpdateAsync(int id, UpdateRequestTypeRequest request, CancellationToken cancellationToken)
     {
         var entity = await db.RequestTypes.FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (entity is null)
@@ -49,7 +49,7 @@ public sealed class RequestTypeService(ApprovalRouteDbContext db)
         return Result.Ok(ToDto(entity));
     }
 
-    public async Task<Result> DeleteAsync(Guid id, CancellationToken cancellationToken)
+    public async Task<Result> DeleteAsync(int id, CancellationToken cancellationToken)
     {
         var entity = await db.RequestTypes.FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (entity is null)

backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepDto.cs

@@ -3,14 +3,14 @@ using Tnsu.ApprovalRoute.Domain.Enums;
 namespace Tnsu.ApprovalRoute.Application.TemplateRouteSteps;
 
 public sealed record TemplateRouteStepDto(
-    Guid Id,
+    int Id,
     int OrderNo,
     string ExecutorEmail,
     string Position,
     ProjectRole ProjectRole,
     HeadType HeadType,
     RouteStepStatus Status,
-    Guid RouteId,
+    int RouteId,
     bool AllowReassignToOtherApprovers);
 
 public sealed record CreateTemplateRouteStepRequest(

backend/src/Tnsu.ApprovalRoute.Application/TemplateRouteSteps/TemplateRouteStepService.cs

@@ -9,7 +9,7 @@ namespace Tnsu.ApprovalRoute.Application.TemplateRouteSteps;
 
 public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
 {
-    public async Task<Result<IReadOnlyList<TemplateRouteStepDto>>> ListAsync(Guid routeId, CancellationToken cancellationToken)
+    public async Task<Result<IReadOnlyList<TemplateRouteStepDto>>> ListAsync(int routeId, CancellationToken cancellationToken)
     {
         var items = await db.TemplateRouteSteps.AsNoTracking()
             .Where(x => x.RouteId == routeId)
@@ -21,7 +21,7 @@ public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
         return Result.Ok<IReadOnlyList<TemplateRouteStepDto>>(items);
     }
 
-    public async Task<Result<TemplateRouteStepDto>> GetAsync(Guid routeId, Guid id, CancellationToken cancellationToken)
+    public async Task<Result<TemplateRouteStepDto>> GetAsync(int routeId, int id, CancellationToken cancellationToken)
     {
         var entity = await db.TemplateRouteSteps.AsNoTracking()
             .FirstOrDefaultAsync(x => x.Id == id && x.RouteId == routeId, cancellationToken);
@@ -31,7 +31,7 @@ public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
             : Result.Ok(ToDto(entity));
     }
 
-    public async Task<Result<TemplateRouteStepDto>> CreateAsync(Guid routeId, CreateTemplateRouteStepRequest r, CancellationToken cancellationToken)
+    public async Task<Result<TemplateRouteStepDto>> CreateAsync(int routeId, CreateTemplateRouteStepRequest r, CancellationToken cancellationToken)
     {
         var route = await db.TemplateRoutes.FirstOrDefaultAsync(x => x.Id == routeId, cancellationToken);
         if (route is null)
@@ -60,7 +60,7 @@ public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
     }
 
     public async Task<Result<TemplateRouteStepDto>> UpdateAsync(
-        Guid routeId, Guid id, UpdateTemplateRouteStepRequest r, CancellationToken cancellationToken)
+        int routeId, int id, UpdateTemplateRouteStepRequest r, CancellationToken cancellationToken)
     {
         var route = await db.TemplateRoutes.FirstOrDefaultAsync(x => x.Id == routeId, cancellationToken);
         if (route is null)
@@ -87,7 +87,7 @@ public sealed class TemplateRouteStepService(ApprovalRouteDbContext db)
         return await AppendMissingProjectRoleWarningAsync(route, result, cancellationToken);
     }
 
-    public async Task<Result> DeleteAsync(Guid routeId, Guid id, CancellationToken cancellationToken)
+    public async Task<Result> DeleteAsync(int routeId, int id, CancellationToken cancellationToken)
     {
         var entity = await db.TemplateRouteSteps.FirstOrDefaultAsync(x => x.Id == id && x.RouteId == routeId, cancellationToken);
         if (entity is null)

backend/src/Tnsu.ApprovalRoute.Application/TemplateRoutes/ResolveTemplateRouteDto.cs

@@ -3,7 +3,7 @@ using Tnsu.ApprovalRoute.Domain.Enums;
 namespace Tnsu.ApprovalRoute.Application.TemplateRoutes;
 
 public sealed record ResolvedRouteStepDto(
-    Guid Id,
+    int Id,
     int OrderNo,
     string ExecutorEmail,
     string Position,
@@ -13,13 +13,13 @@ public sealed record ResolvedRouteStepDto(
     bool AllowReassignToOtherApprovers);
 
 public sealed record ResolveTemplateRouteResultDto(
-    Guid RouteId,
+    int RouteId,
     RouteType RouteType,
     bool RequiresControl,
     IReadOnlyList<ResolvedRouteStepDto> Steps);
 
 public sealed record ResolveTemplateRouteRequest(
-    Guid RequestTypeId,
+    int RequestTypeId,
     string? UserEmail,
     Guid? ProjectId,
     RouteStepStatus Status);

backend/src/Tnsu.ApprovalRoute.Application/TemplateRoutes/TemplateRouteDto.cs

@@ -3,9 +3,9 @@ using Tnsu.ApprovalRoute.Domain.Enums;
 namespace Tnsu.ApprovalRoute.Application.TemplateRoutes;
 
 public sealed record TemplateRouteDto(
-    Guid Id,
+    int Id,
     RouteType RouteType,
-    Guid RequestTypeId,
+    int RequestTypeId,
     string? Department,
     string Company,
     bool ByProject,
@@ -13,7 +13,7 @@ public sealed record TemplateRouteDto(
 
 public sealed record CreateTemplateRouteRequest(
     RouteType RouteType,
-    Guid RequestTypeId,
+    int RequestTypeId,
     string? Department,
     string Company,
     bool ByProject,

backend/src/Tnsu.ApprovalRoute.Application/TemplateRoutes/TemplateRouteService.cs

@@ -14,7 +14,7 @@ public sealed class TemplateRouteService(
     ITnsuPortalClient portalClient,
     ICurrentUser currentUser)
 {
-    public async Task<Result<IReadOnlyList<TemplateRouteDto>>> ListAsync(Guid? requestTypeId, CancellationToken cancellationToken)
+    public async Task<Result<IReadOnlyList<TemplateRouteDto>>> ListAsync(int? requestTypeId, CancellationToken cancellationToken)
     {
         var query = db.TemplateRoutes.AsNoTracking().AsQueryable();
         if (requestTypeId is { } id)
@@ -28,7 +28,7 @@ public sealed class TemplateRouteService(
         return Result.Ok<IReadOnlyList<TemplateRouteDto>>(items);
     }
 
-    public async Task<Result<TemplateRouteDto>> GetAsync(Guid id, CancellationToken cancellationToken)
+    public async Task<Result<TemplateRouteDto>> GetAsync(int id, CancellationToken cancellationToken)
     {
         var entity = await db.TemplateRoutes.AsNoTracking().FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
 
@@ -64,7 +64,7 @@ public sealed class TemplateRouteService(
         return Result.Ok(ToDto(entity));
     }
 
-    public async Task<Result<TemplateRouteDto>> UpdateAsync(Guid id, UpdateTemplateRouteRequest r, CancellationToken cancellationToken)
+    public async Task<Result<TemplateRouteDto>> UpdateAsync(int id, UpdateTemplateRouteRequest r, CancellationToken cancellationToken)
     {
         var entity = await db.TemplateRoutes.FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (entity is null)
@@ -86,7 +86,7 @@ public sealed class TemplateRouteService(
         return Result.Ok(ToDto(entity));
     }
 
-    public async Task<Result> DeleteAsync(Guid id, CancellationToken cancellationToken)
+    public async Task<Result> DeleteAsync(int id, CancellationToken cancellationToken)
     {
         var entity = await db.TemplateRoutes.FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (entity is null)
@@ -113,7 +113,7 @@ public sealed class TemplateRouteService(
         var employee = await portalClient.GetEmployeeByEmailAsync(email, cancellationToken);
         if (employee is null)
             return Result.Fail<ResolveTemplateRouteResultDto>(
-                new NotFoundError("Сотрудник по email в справочнике api.tnsu.kz не найден", Guid.Empty));
+                new NotFoundError("Сотрудник в справочнике api.tnsu.kz по email", email));
 
         var byProject = request.ProjectId is not null;
         var department = Normalize(employee.Department);
@@ -154,7 +154,7 @@ public sealed class TemplateRouteService(
     }
 
     private Task<bool> HasDuplicateAsync(
-        Guid requestTypeId, string? department, string company, bool byProject, Guid? excludeId, CancellationToken cancellationToken) =>
+        int requestTypeId, string? department, string company, bool byProject, int? excludeId, CancellationToken cancellationToken) =>
         db.TemplateRoutes.AnyAsync(x =>
             x.Id != excludeId &&
             x.RequestTypeId == requestTypeId &&

backend/src/Tnsu.ApprovalRoute.Domain/Entities/RequestType.cs

@@ -1,11 +1,8 @@
-using System;
-using System.Collections.Generic;
-
 namespace Tnsu.ApprovalRoute.Domain.Entities;
 
 public class RequestType
 {
-    public Guid Id { get; set; } = Guid.NewGuid();
+    public int Id { get; set; }
     public string Name { get; set; } = string.Empty;
     public string PageUrl { get; set; } = string.Empty;
 

backend/src/Tnsu.ApprovalRoute.Domain/Entities/TemplateRoute.cs

@@ -4,9 +4,9 @@ namespace Tnsu.ApprovalRoute.Domain.Entities;
 
 public class TemplateRoute
 {
-    public Guid Id { get; set; } = Guid.NewGuid();
+    public int Id { get; set; }
     public RouteType RouteType { get; set; } = RouteType.Sequential;
-    public Guid RequestTypeId { get; set; }
+    public int RequestTypeId { get; set; }
 
     // Компания и отдел инициатора — названия из справочника AD (api-tnsu-portal /Employee/ByEmail),
     // хранятся строками без FK в этой БД. Отдел опционален, компания обязательна.

backend/src/Tnsu.ApprovalRoute.Domain/Entities/TemplateRouteStep.cs

@@ -4,7 +4,7 @@ namespace Tnsu.ApprovalRoute.Domain.Entities;
 
 public class TemplateRouteStep
 {
-    public Guid Id { get; set; } = Guid.NewGuid();
+    public int Id { get; set; }
     public int OrderNo { get; set; }
 
     // Внешняя ссылка на пользователя (1С/ZUP) — без локальной таблицы Users.
@@ -14,7 +14,7 @@ public class TemplateRouteStep
     public HeadType HeadType { get; set; } = HeadType.None;
 
     public RouteStepStatus Status { get; set; } = RouteStepStatus.Approval;
-    public Guid RouteId { get; set; }
+    public int RouteId { get; set; }
     public bool AllowReassignToOtherApprovers { get; set; }
 
     public TemplateRoute? Route { get; set; }

backend/src/Tnsu.ApprovalRoute.Infrastructure/Persistence/Migrations/20260724085143_InitialCreate.Designer.cs

@@ -1,5 +1,4 @@
 // <auto-generated />
-using System;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Migrations;
@@ -12,7 +11,7 @@ using Tnsu.ApprovalRoute.Infrastructure.Persistence;
 namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
 {
     [DbContext(typeof(ApprovalRouteDbContext))]
-    [Migration("20260724071302_InitialCreate")]
+    [Migration("20260724085143_InitialCreate")]
     partial class InitialCreate
     {
         /// <inheritdoc />
@@ -27,11 +26,13 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
 
             modelBuilder.Entity("Tnsu.ApprovalRoute.Domain.Entities.RequestType", b =>
                 {
-                    b.Property<Guid>("Id")
+                    b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("id");
 
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(256)
@@ -52,11 +53,13 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
 
             modelBuilder.Entity("Tnsu.ApprovalRoute.Domain.Entities.TemplateRoute", b =>
                 {
-                    b.Property<Guid>("Id")
+                    b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("id");
 
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
                     b.Property<bool>("ByProject")
                         .HasColumnType("boolean")
                         .HasColumnName("by_project");
@@ -72,8 +75,8 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
                         .HasColumnType("character varying(256)")
                         .HasColumnName("department");
 
-                    b.Property<Guid>("RequestTypeId")
+                    b.Property<int>("RequestTypeId")
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("request_type_id");
 
                     b.Property<bool>("RequiresControl")
@@ -98,11 +101,13 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
 
             modelBuilder.Entity("Tnsu.ApprovalRoute.Domain.Entities.TemplateRouteStep", b =>
                 {
-                    b.Property<Guid>("Id")
+                    b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("id");
 
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
                     b.Property<bool>("AllowReassignToOtherApprovers")
                         .HasColumnType("boolean")
                         .HasColumnName("allow_reassign_to_other_approvers");
@@ -135,8 +140,8 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
                         .HasColumnType("character varying(32)")
                         .HasColumnName("project_role");
 
-                    b.Property<Guid>("RouteId")
+                    b.Property<int>("RouteId")
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("route_id");
 
                     b.Property<string>("Status")

backend/src/Tnsu.ApprovalRoute.Infrastructure/Persistence/Migrations/20260724085143_InitialCreate.cs

@@ -1,5 +1,5 @@
-using System;
+using Microsoft.EntityFrameworkCore.Migrations;
-using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
@@ -15,7 +15,8 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
                 name: "request_types",
                 columns: table => new
                 {
-                    id = table.Column<Guid>(type: "uuid", nullable: false),
+                    id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                     name = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
                     page_url = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: false)
                 },
@@ -28,9 +29,10 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
                 name: "template_routes",
                 columns: table => new
                 {
-                    id = table.Column<Guid>(type: "uuid", nullable: false),
+                    id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                     route_type = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
-                    request_type_id = table.Column<Guid>(type: "uuid", nullable: false),
+                    request_type_id = table.Column<int>(type: "integer", nullable: false),
                     department = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
                     company = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
                     by_project = table.Column<bool>(type: "boolean", nullable: false),
@@ -51,14 +53,15 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
                 name: "template_route_steps",
                 columns: table => new
                 {
-                    id = table.Column<Guid>(type: "uuid", nullable: false),
+                    id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                     order_no = table.Column<int>(type: "integer", nullable: false),
                     executor_email = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
                     position = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false),
                     project_role = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
                     head_type = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
                     status = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
-                    route_id = table.Column<Guid>(type: "uuid", nullable: false),
+                    route_id = table.Column<int>(type: "integer", nullable: false),
                     allow_reassign_to_other_approvers = table.Column<bool>(type: "boolean", nullable: false)
                 },
                 constraints: table =>

backend/src/Tnsu.ApprovalRoute.Infrastructure/Persistence/Migrations/ApprovalRouteDbContextModelSnapshot.cs

@@ -1,5 +1,4 @@
 // <auto-generated />
-using System;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
@@ -24,11 +23,13 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
 
             modelBuilder.Entity("Tnsu.ApprovalRoute.Domain.Entities.RequestType", b =>
                 {
-                    b.Property<Guid>("Id")
+                    b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("id");
 
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(256)
@@ -49,11 +50,13 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
 
             modelBuilder.Entity("Tnsu.ApprovalRoute.Domain.Entities.TemplateRoute", b =>
                 {
-                    b.Property<Guid>("Id")
+                    b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("id");
 
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
                     b.Property<bool>("ByProject")
                         .HasColumnType("boolean")
                         .HasColumnName("by_project");
@@ -69,8 +72,8 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
                         .HasColumnType("character varying(256)")
                         .HasColumnName("department");
 
-                    b.Property<Guid>("RequestTypeId")
+                    b.Property<int>("RequestTypeId")
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("request_type_id");
 
                     b.Property<bool>("RequiresControl")
@@ -95,11 +98,13 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
 
             modelBuilder.Entity("Tnsu.ApprovalRoute.Domain.Entities.TemplateRouteStep", b =>
                 {
-                    b.Property<Guid>("Id")
+                    b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("id");
 
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
                     b.Property<bool>("AllowReassignToOtherApprovers")
                         .HasColumnType("boolean")
                         .HasColumnName("allow_reassign_to_other_approvers");
@@ -132,8 +137,8 @@ namespace Tnsu.ApprovalRoute.Infrastructure.Persistence.Migrations
                         .HasColumnType("character varying(32)")
                         .HasColumnName("project_role");
 
-                    b.Property<Guid>("RouteId")
+                    b.Property<int>("RouteId")
-                        .HasColumnType("uuid")
+                        .HasColumnType("integer")
                         .HasColumnName("route_id");
 
                     b.Property<string>("Status")

backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/RequestTypeServiceTests.cs

@@ -33,7 +33,7 @@ public sealed class RequestTypeServiceTests(PostgresDatabaseFixture fixture) : I
     public async Task GetAsync_UnknownId_ReturnsFailedResult()
     {
         // Action
-        var result = await _service.GetAsync(Guid.NewGuid(), CancellationToken.None);
+        var result = await _service.GetAsync(999999, CancellationToken.None);
 
         // Assert
         result.IsFailed.ShouldBeTrue();
@@ -60,7 +60,7 @@ public sealed class RequestTypeServiceTests(PostgresDatabaseFixture fixture) : I
     {
         // Action
         var result = await _service.UpdateAsync(
-            Guid.NewGuid(), new UpdateRequestTypeRequest("X", "/x"), CancellationToken.None);
+            999999, new UpdateRequestTypeRequest("X", "/x"), CancellationToken.None);
 
         // Assert
         result.IsFailed.ShouldBeTrue();

backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/TemplateRouteServiceTests.cs

@@ -34,7 +34,7 @@ public sealed class TemplateRouteServiceTests : IClassFixture<PostgresDatabaseFi
         _requestTypeService = _services.GetRequiredService<RequestTypeService>();
     }
 
-    private async Task<Guid> CreateRequestTypeAsync(string name) =>
+    private async Task<int> CreateRequestTypeAsync(string name) =>
         (await _requestTypeService.CreateAsync(new CreateRequestTypeRequest(name, $"/{name}"), CancellationToken.None)).Value.Id;
 
     [Fact(DisplayName = "Создание маршрута и получение его по Id возвращает сохранённые данные")]
@@ -62,7 +62,7 @@ public sealed class TemplateRouteServiceTests : IClassFixture<PostgresDatabaseFi
     {
         // Action
         var result = await _service.CreateAsync(
-            new CreateTemplateRouteRequest(RouteType.Sequential, Guid.NewGuid(), Department, Company, ByProject: false, RequiresControl: false),
+            new CreateTemplateRouteRequest(RouteType.Sequential, 999999, Department, Company, ByProject: false, RequiresControl: false),
             CancellationToken.None);
 
         // Assert
@@ -202,7 +202,7 @@ public sealed class TemplateRouteServiceTests : IClassFixture<PostgresDatabaseFi
     {
         // Action
         var resolved = await _service.ResolveAsync(
-            new ResolveTemplateRouteRequest(Guid.NewGuid(), "someone@tnsu.kz", null, RouteStepStatus.Approval),
+            new ResolveTemplateRouteRequest(999999, "someone@tnsu.kz", null, RouteStepStatus.Approval),
             CancellationToken.None);
 
         // Assert

backend/tests/Tnsu.ApprovalRoute.IntegrationTests/ApplicationServices/TemplateRouteStepServiceTests.cs

@@ -24,7 +24,7 @@ public sealed class TemplateRouteStepServiceTests : IClassFixture<PostgresDataba
         _requestTypeService = services.GetRequiredService<RequestTypeService>();
     }
 
-    private async Task<Guid> CreateRouteAsync(string requestTypeName, bool byProject)
+    private async Task<int> CreateRouteAsync(string requestTypeName, bool byProject)
     {
         var requestTypeId = (await _requestTypeService.CreateAsync(
             new CreateRequestTypeRequest(requestTypeName, $"/{requestTypeName}"), CancellationToken.None)).Value.Id;
@@ -41,7 +41,7 @@ public sealed class TemplateRouteStepServiceTests : IClassFixture<PostgresDataba
     {
         // Action
         var result = await _service.CreateAsync(
-            Guid.NewGuid(),
+            999999,
             new CreateTemplateRouteStepRequest(1, "a@b.kz", "Engineer", ProjectRole.None, HeadType.None, RouteStepStatus.Approval, false),
             CancellationToken.None);