db demo, slides

demos/DbDemo/.gitignore

+# Common IntelliJ Platform excludes
+
+.idea/
+
+*.suo
+*.user
+.vs/
+[Bb]in/
+[Oo]bj/
+_UpgradeReport_Files/
+[Pp]ackages/
+
+Thumbs.db
+Desktop.ini
+.DS_Store

demos/DbDemo/.idea/.idea.DbDemo/.idea/codeStyles/codeStyleConfig.xml

+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>
\ No newline at end of file

demos/DbDemo/.idea/.idea.DbDemo/.idea/contentModel.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ContentModelStore">
+    <e p="$PROJECT_DIR$" t="IncludeFlat">
+      <e p="ConsoleApp" t="IncludeRecursive">
+        <e p="app.db" t="Include" />
+        <e p="bin" t="ExcludeRecursive" />
+        <e p="ConsoleApp.csproj" t="IncludeRecursive" />
+        <e p="obj" t="ExcludeRecursive">
+          <e p="Debug" t="Include">
+            <e p="netcoreapp3.1" t="Include">
+              <e p="ConsoleApp.AssemblyInfo.cs" t="Include" />
+            </e>
+          </e>
+        </e>
+        <e p="Program.cs" t="Include" />
+      </e>
+      <e p="DAL" t="IncludeRecursive">
+        <e p="AppDbContext.cs" t="Include" />
+        <e p="bin" t="ExcludeRecursive" />
+        <e p="DAL.csproj" t="IncludeRecursive" />
+        <e p="Migrations" t="Include">
+          <e p="20201016102442_InitialCreate.cs" t="Include" />
+          <e p="20201016102442_InitialCreate.Designer.cs" t="Include" />
+          <e p="AppDbContextModelSnapshot.cs" t="Include" />
+        </e>
+        <e p="obj" t="ExcludeRecursive">
+          <e p="Debug" t="Include">
+            <e p="netstandard2.1" t="Include">
+              <e p="DAL.AssemblyInfo.cs" t="Include" />
+            </e>
+          </e>
+        </e>
+      </e>
+      <e p="DbDemo.sln" t="IncludeFlat" />
+      <e p="Domain" t="IncludeRecursive">
+        <e p="bin" t="ExcludeRecursive" />
+        <e p="Domain.csproj" t="IncludeRecursive" />
+        <e p="Grade.cs" t="Include" />
+        <e p="Homework.cs" t="Include" />
+        <e p="obj" t="ExcludeRecursive">
+          <e p="Debug" t="Include">
+            <e p="netstandard2.1" t="Include">
+              <e p="Domain.AssemblyInfo.cs" t="Include" />
+            </e>
+          </e>
+        </e>
+        <e p="Student.cs" t="Include" />
+      </e>
+      <e p="packages" t="ExcludeRecursive" />
+    </e>
+    <e p="$APPLICATION_CONFIG_DIR$/consoles/db" t="IncludeRecursive" />
+    <e p="$APPLICATION_CONFIG_DIR$/extensions" t="IncludeRecursive" />
+    <e p="$APPLICATION_CONFIG_DIR$/scratches" t="IncludeRecursive" />
+    <e p="$USER_HOME$/Library/Caches/JetBrains/Rider2020.2/extResources" t="IncludeRecursive" />
+    <e p="$USER_HOME$/Library/Caches/JetBrains/Rider2020.2/resharper-host/local/Transient/Rider/v202/SolutionCaches/_DbDemo.-734520131.00" t="ExcludeRecursive" />
+  </component>
+</project>
\ No newline at end of file

demos/DbDemo/.idea/.idea.DbDemo/.idea/encodings.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
+</project>
\ No newline at end of file

demos/DbDemo/.idea/.idea.DbDemo/.idea/indexLayout.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ContentModelUserStore">
+    <attachedFolders />
+    <explicitIncludes />
+    <explicitExcludes />
+  </component>
+</project>
\ No newline at end of file

demos/DbDemo/.idea/.idea.DbDemo/.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/.idea.DbDemo/riderModule.iml" filepath="$PROJECT_DIR$/.idea/.idea.DbDemo/riderModule.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

demos/DbDemo/.idea/.idea.DbDemo/.idea/projectSettingsUpdater.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RiderProjectSettingsUpdater">
+    <option name="vcsConfiguration" value="2" />
+  </component>
+</project>
\ No newline at end of file

demos/DbDemo/.idea/.idea.DbDemo/.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

demos/DbDemo/.idea/.idea.DbDemo/riderModule.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="RIDER_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$/../.." />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

demos/DbDemo/ConsoleApp/ConsoleApp.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>netcoreapp3.1</TargetFramework>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\DAL\DAL.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.9">
+        <PrivateAssets>all</PrivateAssets>
+        <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      </PackageReference>
+    </ItemGroup>
+
+</Project>

demos/DbDemo/ConsoleApp/Program.cs

+using System;
+using DAL;
+using Microsoft.EntityFrameworkCore;
+
+namespace ConsoleApp
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // dotnet tool update --global dotnet-ef
+            //  dotnet tool install --global dotnet-ef
+            Console.WriteLine("Hello EF Core Demo!");
+
+            using var db = new AppDbContext();
+            foreach (var student in db.Students)
+            {
+                Console.WriteLine(student);
+            }
+            
+        }
+    }
+}
\ No newline at end of file

demos/DbDemo/DAL/AppDbContext.cs

+using System;
+using Domain;
+using Microsoft.EntityFrameworkCore;
+
+namespace DAL
+{
+    
+    /*
+      <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.9" />
+      <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.9" />
+      <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.9" />
+     */
+    public class AppDbContext : DbContext
+    {
+        public DbSet<Student> Students { get; set; }
+        public DbSet<Homework> Homeworks { get; set; }
+        public DbSet<Grade> Grades { get; set; }
+
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            base.OnConfiguring(optionsBuilder);
+            optionsBuilder.UseSqlite("Data Source=/Users/akaver/Development/!/app.db");
+        }
+    }
+}
\ No newline at end of file

demos/DbDemo/DAL/DAL.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>netstandard2.1</TargetFramework>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.9" />
+      <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.9" />
+      <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.9" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Domain\Domain.csproj" />
+    </ItemGroup>
+
+</Project>

demos/DbDemo/DAL/Migrations/20201016102442_InitialCreate.Designer.cs

+// <auto-generated />
+using DAL;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace DAL.Migrations
+{
+    [DbContext(typeof(AppDbContext))]
+    [Migration("20201016102442_InitialCreate")]
+    partial class InitialCreate
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "3.1.9");
+
+            modelBuilder.Entity("Domain.Grade", b =>
+                {
+                    b.Property<int>("GradeId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("GradeValue")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("HomeworkId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("StudentId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("GradeId");
+
+                    b.HasIndex("HomeworkId");
+
+                    b.HasIndex("StudentId");
+
+                    b.ToTable("Grades");
+                });
+
+            modelBuilder.Entity("Domain.Homework", b =>
+                {
+                    b.Property<int>("HomeworkId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("HomeworkId");
+
+                    b.ToTable("Homeworks");
+                });
+
+            modelBuilder.Entity("Domain.Student", b =>
+                {
+                    b.Property<int>("StudentId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("FirstName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("LastName")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("StudentId");
+
+                    b.ToTable("Students");
+                });
+
+            modelBuilder.Entity("Domain.Grade", b =>
+                {
+                    b.HasOne("Domain.Homework", "Homework")
+                        .WithMany("Grades")
+                        .HasForeignKey("HomeworkId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Domain.Student", "Student")
+                        .WithMany("Grades")
+                        .HasForeignKey("StudentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

demos/DbDemo/DAL/Migrations/20201016102442_InitialCreate.cs

+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace DAL.Migrations
+{
+    public partial class InitialCreate : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Homeworks",
+                columns: table => new
+                {
+                    HomeworkId = table.Column<int>(nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    Description = table.Column<string>(nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Homeworks", x => x.HomeworkId);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Students",
+                columns: table => new
+                {
+                    StudentId = table.Column<int>(nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    FirstName = table.Column<string>(nullable: true),
+                    LastName = table.Column<string>(nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Students", x => x.StudentId);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Grades",
+                columns: table => new
+                {
+                    GradeId = table.Column<int>(nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    GradeValue = table.Column<int>(nullable: false),
+                    StudentId = table.Column<int>(nullable: false),
+                    HomeworkId = table.Column<int>(nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Grades", x => x.GradeId);
+                    table.ForeignKey(
+                        name: "FK_Grades_Homeworks_HomeworkId",
+                        column: x => x.HomeworkId,
+                        principalTable: "Homeworks",
+                        principalColumn: "HomeworkId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Grades_Students_StudentId",
+                        column: x => x.StudentId,
+                        principalTable: "Students",
+                        principalColumn: "StudentId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Grades_HomeworkId",
+                table: "Grades",
+                column: "HomeworkId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Grades_StudentId",
+                table: "Grades",
+                column: "StudentId");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Grades");
+
+            migrationBuilder.DropTable(
+                name: "Homeworks");
+
+            migrationBuilder.DropTable(
+                name: "Students");
+        }
+    }
+}

demos/DbDemo/DAL/Migrations/AppDbContextModelSnapshot.cs

+// <auto-generated />
+using DAL;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace DAL.Migrations
+{
+    [DbContext(typeof(AppDbContext))]
+    partial class AppDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "3.1.9");
+
+            modelBuilder.Entity("Domain.Grade", b =>
+                {
+                    b.Property<int>("GradeId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("GradeValue")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("HomeworkId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("StudentId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("GradeId");
+
+                    b.HasIndex("HomeworkId");
+
+                    b.HasIndex("StudentId");
+
+                    b.ToTable("Grades");
+                });
+
+            modelBuilder.Entity("Domain.Homework", b =>
+                {
+                    b.Property<int>("HomeworkId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("HomeworkId");
+
+                    b.ToTable("Homeworks");
+                });
+
+            modelBuilder.Entity("Domain.Student", b =>
+                {
+                    b.Property<int>("StudentId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("FirstName")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("LastName")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("StudentId");
+
+                    b.ToTable("Students");
+                });
+
+            modelBuilder.Entity("Domain.Grade", b =>
+                {
+                    b.HasOne("Domain.Homework", "Homework")
+                        .WithMany("Grades")
+                        .HasForeignKey("HomeworkId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Domain.Student", "Student")
+                        .WithMany("Grades")
+                        .HasForeignKey("StudentId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

demos/DbDemo/DbDemo.sln

+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleApp", "ConsoleApp\ConsoleApp.csproj", "{4668C514-C666-474D-9EB0-F9495E6CF589}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Domain", "Domain\Domain.csproj", "{CEF01487-DCF3-4D42-B493-D9260D5E3790}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DAL", "DAL\DAL.csproj", "{8DA98771-7D90-44AD-BB99-E25D8F829F7F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4668C514-C666-474D-9EB0-F9495E6CF589}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4668C514-C666-474D-9EB0-F9495E6CF589}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4668C514-C666-474D-9EB0-F9495E6CF589}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4668C514-C666-474D-9EB0-F9495E6CF589}.Release|Any CPU.Build.0 = Release|Any CPU
+		{CEF01487-DCF3-4D42-B493-D9260D5E3790}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CEF01487-DCF3-4D42-B493-D9260D5E3790}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CEF01487-DCF3-4D42-B493-D9260D5E3790}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CEF01487-DCF3-4D42-B493-D9260D5E3790}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8DA98771-7D90-44AD-BB99-E25D8F829F7F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8DA98771-7D90-44AD-BB99-E25D8F829F7F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8DA98771-7D90-44AD-BB99-E25D8F829F7F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8DA98771-7D90-44AD-BB99-E25D8F829F7F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

demos/DbDemo/Domain/Domain.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>netstandard2.1</TargetFramework>
+    </PropertyGroup>
+
+</Project>

demos/DbDemo/Domain/Grade.cs

+namespace Domain
+{
+    public class Grade
+    {
+        public int GradeId { get; set; }
+        
+        public int GradeValue { get; set; }
+
+        // FK - Foreign Key (type has to match with PK in another entity)
+        public int StudentId { get; set; }
+        public Student Student { get; set; }
+
+        public int HomeworkId { get; set; }
+        public Homework Homework { get; set; }
+    }
+    
+}
\ No newline at end of file