add column with migrations

console_ui/Program.cs

@@ -0,0 +1,11 @@
+using presence;
+using presence.Repository;
+RemoteDatabaseContext remoteDatabaseContext = new RemoteDatabaseContext();
+SQLGroupRepository groupRepository = new SQLGroupRepository(remoteDatabaseContext);
+
+ 
+
+foreach (var item in groupRepository.GetAllGroup())
+{
+    Console.WriteLine($"{item.IdGroup} {item.NameGroup}");
+}

console_ui/console_ui.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+	<ItemGroup>
+		<ProjectReference Include="..\presence\presence.csproj"/>
+	</ItemGroup>	
+
+</Project>

presence/DAO/Attedances.cs

@@ -6,12 +6,17 @@ using System.Threading.Tasks;
 
 namespace presence.DAO
 {
-    internal class Attedances
+    public class Attedances
     {
+        public int AttedanceId {  get; set; }
         public DateTime Date { get; set; }
-        public int IdSubjectGroup { get; set; }
-        public int IdStudents {  get; set; }
-        public int IdGroup {  get; set; }
-        public int IdVisit { get; set; }
+        public int SubjectGroupId { get; set; }
+        public virtual GroupSubject SubjectGroup { get; set; }
+        public int StudentsId {  get; set; }
+        public virtual Students Student { get; set; }
+        public int GroupId { get; set; }
+        public virtual Groups Group { get; set; }
+        public int VisitId { get; set; }
+        public virtual Visits Visit { get; set; }
     }
 }

presence/DAO/GroupSubject.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace presence.DAO
+{
+    public class GroupSubject
+    {
+        public int GroupSubjectId { get; set; }
+        public int SubjectId { get; set; }
+        public virtual Subjects Subject { get; set; }
+        public int GroupId { get; set; }
+        public virtual Groups Group { get; set; }
+        public int SemesterId { get; set; } 
+        public virtual Semesters Semester { get; set; }    
+    }
+}

presence/DAO/GroupSubjest.cs

@@ -1,12 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace presence.DAO
-{
-    internal class GroupSubjest
-    {
-    }
-}

presence/DAO/Groups.cs

@@ -6,7 +6,9 @@ using System.Threading.Tasks;
 
 namespace presence.DAO
 {
-    internal class Group
+    public class Groups
     {
+        public int IdGroup { get; set; }
+        public string NameGroup { get; set; }
     }
 }

presence/DAO/Semesters.cs

@@ -6,9 +6,9 @@ using System.Threading.Tasks;
 
 namespace presence.DAO
 {
-    internal class Semesters
+    public class Semesters
     {
-        public int IdSemester {  get; set; }
+        public int SemesterId {  get; set; }
         public DateTime StartTime { get; set; }
         public DateTime EndTime { get; set; }
     }

presence/DAO/Students.cs

@@ -6,7 +6,15 @@ using System.Threading.Tasks;
 
 namespace presence.DAO
 {
-    internal class Students
+    public class Students
     {
+        public int StudentId { get; set; }
+        public string FirstName { get; set; }
+
+        public string LastName { get; set; }
+        public string Surname { get; set; }
+
+        public int GroupId { get; set; }
+        public virtual Groups Group { get; set; }
     }
 }

presence/DAO/Subjects.cs

@@ -6,7 +6,9 @@ using System.Threading.Tasks;
 
 namespace presence.DAO
 {
-    internal class Subjects
+    public class Subjects
     {
+        public int IdSubject { get; set; } 
+        public string NameSubject { get; set; }
     }
 }

presence/DAO/Visits.cs

@@ -6,9 +6,9 @@ using System.Threading.Tasks;
 
 namespace presence.DAO
 {
-    internal class Visit
+    public class Visits
     {
-        public int IdVisit { get; set; }   
+        public int VisitId { get; set; }   
         public string NameVisit { get; set; }
     }
 }

presence/Migrations/20241115130616_columsupdate.Designer.cs

@@ -0,0 +1,267 @@
+// <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 presence;
+
+#nullable disable
+
+namespace presence.Migrations
+{
+    [DbContext(typeof(RemoteDatabaseContext))]
+    [Migration("20241115130616_columsupdate")]
+    partial class columsupdate
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.10")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("presence.DAO.Attedances", b =>
+                {
+                    b.Property<int>("AttedanceId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("AttedanceId"));
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("StudentsId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("SubjectGroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("VisitId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("AttedanceId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("StudentsId");
+
+                    b.HasIndex("SubjectGroupId");
+
+                    b.HasIndex("VisitId");
+
+                    b.ToTable("Attedances");
+                });
+
+            modelBuilder.Entity("presence.DAO.GroupSubject", b =>
+                {
+                    b.Property<int>("GroupSubjectId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("GroupSubjectId"));
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("SemesterId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("SubjectId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("GroupSubjectId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("SemesterId");
+
+                    b.HasIndex("SubjectId");
+
+                    b.ToTable("GroupSubject");
+                });
+
+            modelBuilder.Entity("presence.DAO.Groups", b =>
+                {
+                    b.Property<int>("IdGroup")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("IdGroup"));
+
+                    b.Property<string>("NameGroup")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("IdGroup");
+
+                    b.ToTable("groups");
+                });
+
+            modelBuilder.Entity("presence.DAO.Semesters", b =>
+                {
+                    b.Property<int>("SemesterId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("SemesterId"));
+
+                    b.Property<DateTime>("EndTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime>("StartTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("SemesterId");
+
+                    b.ToTable("Semesters");
+                });
+
+            modelBuilder.Entity("presence.DAO.Students", b =>
+                {
+                    b.Property<int>("StudentId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("StudentId"));
+
+                    b.Property<string>("FirstName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("LastName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Surname")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("StudentId");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("students");
+                });
+
+            modelBuilder.Entity("presence.DAO.Subjects", b =>
+                {
+                    b.Property<int>("IdSubject")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("IdSubject"));
+
+                    b.Property<string>("NameSubject")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("IdSubject");
+
+                    b.ToTable("Subjects");
+                });
+
+            modelBuilder.Entity("presence.DAO.Visits", b =>
+                {
+                    b.Property<int>("VisitId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("VisitId"));
+
+                    b.Property<string>("NameVisit")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("VisitId");
+
+                    b.ToTable("Visits");
+                });
+
+            modelBuilder.Entity("presence.DAO.Attedances", b =>
+                {
+                    b.HasOne("presence.DAO.Groups", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Students", "Student")
+                        .WithMany()
+                        .HasForeignKey("StudentsId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.GroupSubject", "SubjectGroup")
+                        .WithMany()
+                        .HasForeignKey("SubjectGroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Visits", "Visit")
+                        .WithMany()
+                        .HasForeignKey("VisitId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Student");
+
+                    b.Navigation("SubjectGroup");
+
+                    b.Navigation("Visit");
+                });
+
+            modelBuilder.Entity("presence.DAO.GroupSubject", b =>
+                {
+                    b.HasOne("presence.DAO.Groups", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Semesters", "Semester")
+                        .WithMany()
+                        .HasForeignKey("SemesterId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Subjects", "Subject")
+                        .WithMany()
+                        .HasForeignKey("SubjectId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Semester");
+
+                    b.Navigation("Subject");
+                });
+
+            modelBuilder.Entity("presence.DAO.Students", b =>
+                {
+                    b.HasOne("presence.DAO.Groups", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

presence/Migrations/20241115130616_columsupdate.cs

@@ -0,0 +1,230 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace presence.Migrations
+{
+    /// <inheritdoc />
+    public partial class columsupdate : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "groups",
+                columns: table => new
+                {
+                    IdGroup = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    NameGroup = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_groups", x => x.IdGroup);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Semesters",
+                columns: table => new
+                {
+                    SemesterId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    StartTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    EndTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Semesters", x => x.SemesterId);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Subjects",
+                columns: table => new
+                {
+                    IdSubject = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    NameSubject = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Subjects", x => x.IdSubject);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Visits",
+                columns: table => new
+                {
+                    VisitId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    NameVisit = table.Column<string>(type: "text", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Visits", x => x.VisitId);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "students",
+                columns: table => new
+                {
+                    StudentId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    FirstName = table.Column<string>(type: "text", nullable: false),
+                    LastName = table.Column<string>(type: "text", nullable: false),
+                    Surname = table.Column<string>(type: "text", nullable: false),
+                    GroupId = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_students", x => x.StudentId);
+                    table.ForeignKey(
+                        name: "FK_students_groups_GroupId",
+                        column: x => x.GroupId,
+                        principalTable: "groups",
+                        principalColumn: "IdGroup",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "GroupSubject",
+                columns: table => new
+                {
+                    GroupSubjectId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    SubjectId = table.Column<int>(type: "integer", nullable: false),
+                    GroupId = table.Column<int>(type: "integer", nullable: false),
+                    SemesterId = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_GroupSubject", x => x.GroupSubjectId);
+                    table.ForeignKey(
+                        name: "FK_GroupSubject_Semesters_SemesterId",
+                        column: x => x.SemesterId,
+                        principalTable: "Semesters",
+                        principalColumn: "SemesterId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_GroupSubject_Subjects_SubjectId",
+                        column: x => x.SubjectId,
+                        principalTable: "Subjects",
+                        principalColumn: "IdSubject",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_GroupSubject_groups_GroupId",
+                        column: x => x.GroupId,
+                        principalTable: "groups",
+                        principalColumn: "IdGroup",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Attedances",
+                columns: table => new
+                {
+                    AttedanceId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Date = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    SubjectGroupId = table.Column<int>(type: "integer", nullable: false),
+                    StudentsId = table.Column<int>(type: "integer", nullable: false),
+                    GroupId = table.Column<int>(type: "integer", nullable: false),
+                    VisitId = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Attedances", x => x.AttedanceId);
+                    table.ForeignKey(
+                        name: "FK_Attedances_GroupSubject_SubjectGroupId",
+                        column: x => x.SubjectGroupId,
+                        principalTable: "GroupSubject",
+                        principalColumn: "GroupSubjectId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Attedances_Visits_VisitId",
+                        column: x => x.VisitId,
+                        principalTable: "Visits",
+                        principalColumn: "VisitId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Attedances_groups_GroupId",
+                        column: x => x.GroupId,
+                        principalTable: "groups",
+                        principalColumn: "IdGroup",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Attedances_students_StudentsId",
+                        column: x => x.StudentsId,
+                        principalTable: "students",
+                        principalColumn: "StudentId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Attedances_GroupId",
+                table: "Attedances",
+                column: "GroupId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Attedances_StudentsId",
+                table: "Attedances",
+                column: "StudentsId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Attedances_SubjectGroupId",
+                table: "Attedances",
+                column: "SubjectGroupId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Attedances_VisitId",
+                table: "Attedances",
+                column: "VisitId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_GroupSubject_GroupId",
+                table: "GroupSubject",
+                column: "GroupId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_GroupSubject_SemesterId",
+                table: "GroupSubject",
+                column: "SemesterId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_GroupSubject_SubjectId",
+                table: "GroupSubject",
+                column: "SubjectId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_students_GroupId",
+                table: "students",
+                column: "GroupId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Attedances");
+
+            migrationBuilder.DropTable(
+                name: "GroupSubject");
+
+            migrationBuilder.DropTable(
+                name: "Visits");
+
+            migrationBuilder.DropTable(
+                name: "students");
+
+            migrationBuilder.DropTable(
+                name: "Semesters");
+
+            migrationBuilder.DropTable(
+                name: "Subjects");
+
+            migrationBuilder.DropTable(
+                name: "groups");
+        }
+    }
+}

presence/Migrations/RemoteDatabaseContextModelSnapshot.cs

@@ -0,0 +1,264 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using presence;
+
+#nullable disable
+
+namespace presence.Migrations
+{
+    [DbContext(typeof(RemoteDatabaseContext))]
+    partial class RemoteDatabaseContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.10")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("presence.DAO.Attedances", b =>
+                {
+                    b.Property<int>("AttedanceId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("AttedanceId"));
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("StudentsId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("SubjectGroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("VisitId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("AttedanceId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("StudentsId");
+
+                    b.HasIndex("SubjectGroupId");
+
+                    b.HasIndex("VisitId");
+
+                    b.ToTable("Attedances");
+                });
+
+            modelBuilder.Entity("presence.DAO.GroupSubject", b =>
+                {
+                    b.Property<int>("GroupSubjectId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("GroupSubjectId"));
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("SemesterId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("SubjectId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("GroupSubjectId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("SemesterId");
+
+                    b.HasIndex("SubjectId");
+
+                    b.ToTable("GroupSubject");
+                });
+
+            modelBuilder.Entity("presence.DAO.Groups", b =>
+                {
+                    b.Property<int>("IdGroup")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("IdGroup"));
+
+                    b.Property<string>("NameGroup")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("IdGroup");
+
+                    b.ToTable("groups");
+                });
+
+            modelBuilder.Entity("presence.DAO.Semesters", b =>
+                {
+                    b.Property<int>("SemesterId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("SemesterId"));
+
+                    b.Property<DateTime>("EndTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime>("StartTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("SemesterId");
+
+                    b.ToTable("Semesters");
+                });
+
+            modelBuilder.Entity("presence.DAO.Students", b =>
+                {
+                    b.Property<int>("StudentId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("StudentId"));
+
+                    b.Property<string>("FirstName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("LastName")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Surname")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("StudentId");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("students");
+                });
+
+            modelBuilder.Entity("presence.DAO.Subjects", b =>
+                {
+                    b.Property<int>("IdSubject")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("IdSubject"));
+
+                    b.Property<string>("NameSubject")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("IdSubject");
+
+                    b.ToTable("Subjects");
+                });
+
+            modelBuilder.Entity("presence.DAO.Visits", b =>
+                {
+                    b.Property<int>("VisitId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("VisitId"));
+
+                    b.Property<string>("NameVisit")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("VisitId");
+
+                    b.ToTable("Visits");
+                });
+
+            modelBuilder.Entity("presence.DAO.Attedances", b =>
+                {
+                    b.HasOne("presence.DAO.Groups", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Students", "Student")
+                        .WithMany()
+                        .HasForeignKey("StudentsId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.GroupSubject", "SubjectGroup")
+                        .WithMany()
+                        .HasForeignKey("SubjectGroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Visits", "Visit")
+                        .WithMany()
+                        .HasForeignKey("VisitId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Student");
+
+                    b.Navigation("SubjectGroup");
+
+                    b.Navigation("Visit");
+                });
+
+            modelBuilder.Entity("presence.DAO.GroupSubject", b =>
+                {
+                    b.HasOne("presence.DAO.Groups", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Semesters", "Semester")
+                        .WithMany()
+                        .HasForeignKey("SemesterId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("presence.DAO.Subjects", "Subject")
+                        .WithMany()
+                        .HasForeignKey("SubjectId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Semester");
+
+                    b.Navigation("Subject");
+                });
+
+            modelBuilder.Entity("presence.DAO.Students", b =>
+                {
+                    b.HasOne("presence.DAO.Groups", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

presence/RemoteDatabaseContext.cs

@@ -0,0 +1,42 @@
+using Microsoft.EntityFrameworkCore;
+using presence.DAO;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace presence
+{
+    public class RemoteDatabaseContext: DbContext
+    {
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            optionsBuilder.UseNpgsql("Host=45.67.56.214; Port=5454; Username=user22; Password=ruts0qI5; Database=user22;");
+        }
+
+        public DbSet<Groups> groups {  get; set; }
+
+        public DbSet<Students> students { get; set; }
+
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            modelBuilder.Entity<Students>().HasKey(it => it.StudentId);
+            modelBuilder.Entity<Groups>().HasKey(it => it.IdGroup);
+            modelBuilder.Entity<GroupSubject>().HasKey(it => it.GroupSubjectId);
+            modelBuilder.Entity<Semesters>().HasKey(it => it.SemesterId);
+            modelBuilder.Entity<Visits>().HasKey(it => it.VisitId);
+            modelBuilder.Entity<Subjects>().HasKey(it => it.IdSubject);
+            modelBuilder.Entity<Attedances>().HasKey(it => it.AttedanceId);
+            
+
+            modelBuilder.Entity<Students>().Property(it => it.StudentId).ValueGeneratedOnAdd();
+            modelBuilder.Entity<Groups>().Property(it => it.IdGroup).ValueGeneratedOnAdd();
+            modelBuilder.Entity<GroupSubject>().Property(it => it.GroupSubjectId).ValueGeneratedOnAdd();
+            modelBuilder.Entity<Semesters>().Property(it => it.SemesterId).ValueGeneratedOnAdd();
+            modelBuilder.Entity<Visits>().Property(it => it.VisitId).ValueGeneratedOnAdd();
+            modelBuilder.Entity<Subjects>().Property(it => it.IdSubject).ValueGeneratedOnAdd();
+            modelBuilder.Entity<Attedances>().Property(it =>  it.AttedanceId).ValueGeneratedOnAdd();
+        }
+    }
+}

presence/Repository/IRepositoryGroup.cs

@@ -0,0 +1,15 @@
+using presence.DAO;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace presence.Repository
+{
+    public interface IRepositoryGroup
+    {
+        public IEnumerable<Groups> GetAllGroup();
+        public bool AddGroup(Groups group);
+    }
+}

presence/Repository/SQLGroupRepository.cs

@@ -0,0 +1,26 @@
+using presence.DAO;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace presence.Repository
+{
+    public class SQLGroupRepository : IRepositoryGroup
+
+    {
+        private readonly RemoteDatabaseContext _dbContext;
+        public SQLGroupRepository(RemoteDatabaseContext remoteDatabaseContext) { _dbContext = remoteDatabaseContext;  }
+
+        public bool AddGroup(Groups group)
+        {
+            throw new NotImplementedException();
+        }
+
+        public IEnumerable<Groups> GetAllGroup()
+        {
+            return _dbContext.groups.ToList();
+        }
+    }
+}

presence/presence.csproj

@@ -6,18 +6,18 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Include="DAO\Visits.cs" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.0">
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.10" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.10">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.10" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Folder Include="DAO\" />
-  </ItemGroup>
-
 </Project>

presenceAndrianov.sln

@@ -1,10 +1,12 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
-VisualStudioVersion = 17.12.35506.116 d17.12
+VisualStudioVersion = 17.12.35506.116
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "presence", "presence\presence.csproj", "{5DBB1FC4-E89F-4AC4-B5FD-D8A5321300CA}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "console_ui", "console_ui\console_ui.csproj", "{F7E55888-B021-45E4-8D75-312353FFE5E8}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{5DBB1FC4-E89F-4AC4-B5FD-D8A5321300CA}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{5DBB1FC4-E89F-4AC4-B5FD-D8A5321300CA}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{5DBB1FC4-E89F-4AC4-B5FD-D8A5321300CA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F7E55888-B021-45E4-8D75-312353FFE5E8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F7E55888-B021-45E4-8D75-312353FFE5E8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F7E55888-B021-45E4-8D75-312353FFE5E8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F7E55888-B021-45E4-8D75-312353FFE5E8}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE