diff --git a/SmallSoftwareProject/SmallSoftwareDatabase/DefaultConfigurationDatabase.cs b/SmallSoftwareProject/SmallSoftwareDatabase/DefaultConfigurationDatabase.cs
new file mode 100644
index 0000000..ed3c142
--- /dev/null
+++ b/SmallSoftwareProject/SmallSoftwareDatabase/DefaultConfigurationDatabase.cs
@@ -0,0 +1,13 @@
+using SmallSoftwareContracts.Infrastructure;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareDatabase;
+
+class DefaultConfigurationDatabase : IConfigurationDatabase
+{
+    public string ConnectionString => "";
+}
\ No newline at end of file
diff --git a/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.Designer.cs b/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.Designer.cs
new file mode 100644
index 0000000..304aef7
--- /dev/null
+++ b/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.Designer.cs
@@ -0,0 +1,338 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SmallSoftwareDatabase;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    [DbContext(typeof(SmallSoftwareDbContext))]
+    [Migration("20250417140247_FirstMigration")]
+    partial class FirstMigration
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.Property<string>("RequestId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("SoftwareId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("RequestId", "SoftwareId");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ManufacturerName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerName")
+                        .IsUnique();
+
+                    b.ToTable("Manufacturers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Salary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("RequestDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Requests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("WorkerSalary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("ManufacturerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SoftwareType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerId");
+
+                    b.HasIndex("SoftwareName", "IsDeleted")
+                        .IsUnique()
+                        .HasFilter("\"IsDeleted\" = FALSE");
+
+                    b.ToTable("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Workers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Request", "Request")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("RequestId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Request");
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Requests")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Salaries")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Manufacturer", "Manufacturer")
+                        .WithMany("Softwares")
+                        .HasForeignKey("ManufacturerId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Manufacturer");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("SoftwareHistories")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Navigation("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Navigation("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Navigation("InstallationRequests");
+
+                    b.Navigation("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Navigation("Requests");
+
+                    b.Navigation("Salaries");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.cs b/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.cs
new file mode 100644
index 0000000..a5e347b
--- /dev/null
+++ b/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/20250417140247_FirstMigration.cs
@@ -0,0 +1,254 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    /// <inheritdoc />
+    public partial class FirstMigration : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Manufacturers",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    ManufacturerName = table.Column<string>(type: "text", nullable: false),
+                    PrevManufacturerName = table.Column<string>(type: "text", nullable: true),
+                    PrevPrevManufacturerName = table.Column<string>(type: "text", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Manufacturers", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Posts",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    PostId = table.Column<string>(type: "text", nullable: false),
+                    PostName = table.Column<string>(type: "text", nullable: false),
+                    PostType = table.Column<int>(type: "integer", nullable: false),
+                    Salary = table.Column<double>(type: "double precision", nullable: false),
+                    IsActual = table.Column<bool>(type: "boolean", nullable: false),
+                    ChangeDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Posts", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Workers",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    FIO = table.Column<string>(type: "text", nullable: false),
+                    PostId = table.Column<string>(type: "text", nullable: false),
+                    BirthDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    EmploymentDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    IsDeleted = table.Column<bool>(type: "boolean", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Workers", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Softwares",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    SoftwareName = table.Column<string>(type: "text", nullable: false),
+                    SoftwareType = table.Column<int>(type: "integer", nullable: false),
+                    ManufacturerId = table.Column<string>(type: "text", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false),
+                    IsDeleted = table.Column<bool>(type: "boolean", nullable: false),
+                    PrevSoftwareName = table.Column<string>(type: "text", nullable: true),
+                    PrevPrevSoftwareName = table.Column<string>(type: "text", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Softwares", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Softwares_Manufacturers_ManufacturerId",
+                        column: x => x.ManufacturerId,
+                        principalTable: "Manufacturers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Requests",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    WorkerId = table.Column<string>(type: "text", nullable: false),
+                    RequestDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false),
+                    Email = table.Column<string>(type: "text", nullable: false),
+                    Sum = table.Column<double>(type: "double precision", nullable: false),
+                    IsCancel = table.Column<bool>(type: "boolean", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Requests", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Requests_Workers_WorkerId",
+                        column: x => x.WorkerId,
+                        principalTable: "Workers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Salaries",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    WorkerId = table.Column<string>(type: "text", nullable: false),
+                    WorkerSalary = table.Column<double>(type: "double precision", nullable: false),
+                    SalaryDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Salaries", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Salaries_Workers_WorkerId",
+                        column: x => x.WorkerId,
+                        principalTable: "Workers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "SoftwareHistories",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "text", nullable: false),
+                    SoftwareId = table.Column<string>(type: "text", nullable: false),
+                    OldPrice = table.Column<double>(type: "double precision", nullable: false),
+                    ChangeDate = table.Column<DateTime>(type: "timestamp without time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_SoftwareHistories", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_SoftwareHistories_Softwares_SoftwareId",
+                        column: x => x.SoftwareId,
+                        principalTable: "Softwares",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "InstallationRequests",
+                columns: table => new
+                {
+                    SoftwareId = table.Column<string>(type: "text", nullable: false),
+                    RequestId = table.Column<string>(type: "text", nullable: false),
+                    Count = table.Column<int>(type: "integer", nullable: false),
+                    Price = table.Column<double>(type: "double precision", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_InstallationRequests", x => new { x.RequestId, x.SoftwareId });
+                    table.ForeignKey(
+                        name: "FK_InstallationRequests_Requests_RequestId",
+                        column: x => x.RequestId,
+                        principalTable: "Requests",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_InstallationRequests_Softwares_SoftwareId",
+                        column: x => x.SoftwareId,
+                        principalTable: "Softwares",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_InstallationRequests_SoftwareId",
+                table: "InstallationRequests",
+                column: "SoftwareId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Manufacturers_ManufacturerName",
+                table: "Manufacturers",
+                column: "ManufacturerName",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Posts_PostId_IsActual",
+                table: "Posts",
+                columns: new[] { "PostId", "IsActual" },
+                unique: true,
+                filter: "\"IsActual\" = TRUE");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Posts_PostName_IsActual",
+                table: "Posts",
+                columns: new[] { "PostName", "IsActual" },
+                unique: true,
+                filter: "\"IsActual\" = TRUE");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Requests_WorkerId",
+                table: "Requests",
+                column: "WorkerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Salaries_WorkerId",
+                table: "Salaries",
+                column: "WorkerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_SoftwareHistories_SoftwareId",
+                table: "SoftwareHistories",
+                column: "SoftwareId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Softwares_ManufacturerId",
+                table: "Softwares",
+                column: "ManufacturerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Softwares_SoftwareName_IsDeleted",
+                table: "Softwares",
+                columns: new[] { "SoftwareName", "IsDeleted" },
+                unique: true,
+                filter: "\"IsDeleted\" = FALSE");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "InstallationRequests");
+
+            migrationBuilder.DropTable(
+                name: "Posts");
+
+            migrationBuilder.DropTable(
+                name: "Salaries");
+
+            migrationBuilder.DropTable(
+                name: "SoftwareHistories");
+
+            migrationBuilder.DropTable(
+                name: "Requests");
+
+            migrationBuilder.DropTable(
+                name: "Softwares");
+
+            migrationBuilder.DropTable(
+                name: "Workers");
+
+            migrationBuilder.DropTable(
+                name: "Manufacturers");
+        }
+    }
+}
diff --git a/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/SmallSoftwareDbContextModelSnapshot.cs b/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/SmallSoftwareDbContextModelSnapshot.cs
new file mode 100644
index 0000000..50fbfa7
--- /dev/null
+++ b/SmallSoftwareProject/SmallSoftwareDatabase/Migrations/SmallSoftwareDbContextModelSnapshot.cs
@@ -0,0 +1,335 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using SmallSoftwareDatabase;
+
+#nullable disable
+
+namespace SmallSoftwareDatabase.Migrations
+{
+    [DbContext(typeof(SmallSoftwareDbContext))]
+    partial class SmallSoftwareDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.Property<string>("RequestId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("SoftwareId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Count")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("RequestId", "SoftwareId");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ManufacturerName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevManufacturerName")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerName")
+                        .IsUnique();
+
+                    b.ToTable("Manufacturers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Post", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<bool>("IsActual")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PostName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("PostType")
+                        .HasColumnType("integer");
+
+                    b.Property<double>("Salary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PostId", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.HasIndex("PostName", "IsActual")
+                        .IsUnique()
+                        .HasFilter("\"IsActual\" = TRUE");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsCancel")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("RequestDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("Sum")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Requests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("SalaryDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("WorkerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<double>("WorkerSalary")
+                        .HasColumnType("double precision");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkerId");
+
+                    b.ToTable("Salaries");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("ManufacturerId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevPrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PrevSoftwareName")
+                        .HasColumnType("text");
+
+                    b.Property<double>("Price")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("SoftwareType")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ManufacturerId");
+
+                    b.HasIndex("SoftwareName", "IsDeleted")
+                        .IsUnique()
+                        .HasFilter("\"IsDeleted\" = FALSE");
+
+                    b.ToTable("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("ChangeDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<double>("OldPrice")
+                        .HasColumnType("double precision");
+
+                    b.Property<string>("SoftwareId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SoftwareId");
+
+                    b.ToTable("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("BirthDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<DateTime>("EmploymentDate")
+                        .HasColumnType("timestamp without time zone");
+
+                    b.Property<string>("FIO")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("PostId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Workers");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.InstallationRequest", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Request", "Request")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("RequestId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("InstallationRequests")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Request");
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Requests")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Salary", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Worker", "Worker")
+                        .WithMany("Salaries")
+                        .HasForeignKey("WorkerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Worker");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Manufacturer", "Manufacturer")
+                        .WithMany("Softwares")
+                        .HasForeignKey("ManufacturerId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Manufacturer");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.SoftwareHistory", b =>
+                {
+                    b.HasOne("SmallSoftwareDatabase.Models.Software", "Software")
+                        .WithMany("SoftwareHistories")
+                        .HasForeignKey("SoftwareId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Software");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Manufacturer", b =>
+                {
+                    b.Navigation("Softwares");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Request", b =>
+                {
+                    b.Navigation("InstallationRequests");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Software", b =>
+                {
+                    b.Navigation("InstallationRequests");
+
+                    b.Navigation("SoftwareHistories");
+                });
+
+            modelBuilder.Entity("SmallSoftwareDatabase.Models.Worker", b =>
+                {
+                    b.Navigation("Requests");
+
+                    b.Navigation("Salaries");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/SmallSoftwareProject/SmallSoftwareDatabase/SampleContextFactory.cs b/SmallSoftwareProject/SmallSoftwareDatabase/SampleContextFactory.cs
new file mode 100644
index 0000000..148186b
--- /dev/null
+++ b/SmallSoftwareProject/SmallSoftwareDatabase/SampleContextFactory.cs
@@ -0,0 +1,16 @@
+using Microsoft.EntityFrameworkCore.Design;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SmallSoftwareDatabase;
+
+internal class SampleContextFactory : IDesignTimeDbContextFactory<SmallSoftwareDbContext>
+{
+    public SmallSoftwareDbContext CreateDbContext(string[] args)
+    {
+        return new SmallSoftwareDbContext(new DefaultConfigurationDatabase());
+    }
+}
\ No newline at end of file
diff --git a/SmallSoftwareProject/SmallSoftwareDatabase/SmallSoftwareDatabase.csproj b/SmallSoftwareProject/SmallSoftwareDatabase/SmallSoftwareDatabase.csproj
index 4210b78..72eb352 100644
--- a/SmallSoftwareProject/SmallSoftwareDatabase/SmallSoftwareDatabase.csproj
+++ b/SmallSoftwareProject/SmallSoftwareDatabase/SmallSoftwareDatabase.csproj
@@ -9,6 +9,10 @@
   <ItemGroup>
     <PackageReference Include="AutoMapper" Version="14.0.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.3" />
   </ItemGroup>
 
diff --git a/SmallSoftwareProject/SmallSoftwareWebApi/SmallSoftwareWebApi.csproj b/SmallSoftwareProject/SmallSoftwareWebApi/SmallSoftwareWebApi.csproj
index 34641e2..18fd74d 100644
--- a/SmallSoftwareProject/SmallSoftwareWebApi/SmallSoftwareWebApi.csproj
+++ b/SmallSoftwareProject/SmallSoftwareWebApi/SmallSoftwareWebApi.csproj
@@ -9,6 +9,10 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="9.0.3" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Serilog.AspNetCore" Version="9.0.0" />
   </ItemGroup>