presence_sample/data/Migrations/20241120125823_InitialCreate.cs

using System;
using Microsoft.EntityFrameworkCore.Migrations;
using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;

#nullable disable

namespace data.Migrations
{
    /// <inheritdoc />
    public partial class InitialCreate : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.CreateTable(
                name: "Groups",
                columns: table => new
                {
                    Id = table.Column<int>(type: "integer", nullable: false)
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    Name = table.Column<string>(type: "text", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Groups", x => x.Id);
                });

            migrationBuilder.CreateTable(
                name: "Semesters",
                columns: table => new
                {
                    Id = table.Column<int>(type: "integer", nullable: false)
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    Name = table.Column<string>(type: "text", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Semesters", x => x.Id);
                });

            migrationBuilder.CreateTable(
                name: "Subjects",
                columns: table => new
                {
                    Id = table.Column<int>(type: "integer", nullable: false)
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    Name = table.Column<string>(type: "text", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Subjects", x => x.Id);
                });

            migrationBuilder.CreateTable(
                name: "Students",
                columns: table => new
                {
                    Id = table.Column<int>(type: "integer", nullable: false)
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    Name = table.Column<string>(type: "text", nullable: false),
                    GroupId = table.Column<int>(type: "integer", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Students", x => x.Id);
                    table.ForeignKey(
                        name: "FK_Students_Groups_GroupId",
                        column: x => x.GroupId,
                        principalTable: "Groups",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateTable(
                name: "Lessons",
                columns: table => new
                {
                    Id = table.Column<int>(type: "integer", nullable: false)
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    SubjectId = table.Column<int>(type: "integer", nullable: false),
                    SemesterId = table.Column<int>(type: "integer", nullable: false),
                    GroupId = table.Column<int>(type: "integer", nullable: false),
                    Date = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
                    LessonNumber = table.Column<int>(type: "integer", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Lessons", x => x.Id);
                    table.ForeignKey(
                        name: "FK_Lessons_Groups_GroupId",
                        column: x => x.GroupId,
                        principalTable: "Groups",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                    table.ForeignKey(
                        name: "FK_Lessons_Semesters_SemesterId",
                        column: x => x.SemesterId,
                        principalTable: "Semesters",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                    table.ForeignKey(
                        name: "FK_Lessons_Subjects_SubjectId",
                        column: x => x.SubjectId,
                        principalTable: "Subjects",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateTable(
                name: "Attendances",
                columns: table => new
                {
                    Id = table.Column<int>(type: "integer", nullable: false)
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    StudentId = table.Column<int>(type: "integer", nullable: false),
                    LessonId = table.Column<int>(type: "integer", nullable: false),
                    Status = table.Column<string>(type: "text", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Attendances", x => x.Id);
                    table.ForeignKey(
                        name: "FK_Attendances_Lessons_LessonId",
                        column: x => x.LessonId,
                        principalTable: "Lessons",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                    table.ForeignKey(
                        name: "FK_Attendances_Students_StudentId",
                        column: x => x.StudentId,
                        principalTable: "Students",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateIndex(
                name: "IX_Attendances_LessonId",
                table: "Attendances",
                column: "LessonId");

            migrationBuilder.CreateIndex(
                name: "IX_Attendances_StudentId",
                table: "Attendances",
                column: "StudentId");

            migrationBuilder.CreateIndex(
                name: "IX_Lessons_GroupId",
                table: "Lessons",
                column: "GroupId");

            migrationBuilder.CreateIndex(
                name: "IX_Lessons_SemesterId",
                table: "Lessons",
                column: "SemesterId");

            migrationBuilder.CreateIndex(
                name: "IX_Lessons_SubjectId",
                table: "Lessons",
                column: "SubjectId");

            migrationBuilder.CreateIndex(
                name: "IX_Students_GroupId",
                table: "Students",
                column: "GroupId");
        }

        /// <inheritdoc />
        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropTable(
                name: "Attendances");

            migrationBuilder.DropTable(
                name: "Lessons");

            migrationBuilder.DropTable(
                name: "Students");

            migrationBuilder.DropTable(
                name: "Semesters");

            migrationBuilder.DropTable(
                name: "Subjects");

            migrationBuilder.DropTable(
                name: "Groups");
        }
    }
}