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ewdlopewdlop
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Merge pull request #12 from ewdlop/ewdlop-patch-10
Add DataAccessLayer console project and initial migration for Blogs a…
2 parents f740bb3 + 52d11de commit 1fa6d43

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Lines changed: 317 additions & 38 deletions

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‎亂七八糟/亂七八糟.Console/亂七八糟.Console.csproj‎

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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\亂七八糟.SourceGenerators\亂七八糟.SourceGenerators.csproj"
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OutputItemType="Analyzer"
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ReferenceOutputAssembly="false" />
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<ProjectReference Include="..\亂七八糟.SourceGenerators\亂七八糟.SourceGenerators.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
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</ItemGroup>
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</Project>

‎亂七八糟/亂七八糟.DataAccessLayer.Console/Program.cs‎

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// See https://aka.ms/new-console-template for more information
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Console.WriteLine("Hello, World!");

‎亂七八糟/亂七八糟.DataAccessLayer.Console/亂七八糟.DataAccessLayer.Console.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net9.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.2">
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<PrivateAssets>all</PrivateAssets>
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<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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</PackageReference>
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\亂七八糟.DataAccessLayer\亂七八糟.DataAccessLayer.csproj" />
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</ItemGroup>
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</Project>

‎亂七八糟/亂七八糟.DataAccessLayer/BloggingContext.cs‎

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@@ -7,9 +7,11 @@ namespace 亂七八糟.DataAccessLayer;
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/// </summary>
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public class BloggingContext : DbContext
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{
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public static readonly BloggingContext Default = new BloggingContext();
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public DbSet<Blog>? Blogs { get; set; } = Default.Blogs;
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public DbSet<Post>? Posts { get; set; } = Default.Posts;
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//public static readonly BloggingContext Default = new BloggingContext();
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//public required DbSet<Blog> Blogs { get; set; }
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//public required DbSet<Post>? Posts { get; set; }
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public DbSet<Blog>? Blogs { get; set; }
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public DbSet<Post>? Posts { get; set; }
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public string? DbPath { get; } = string.Empty;
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public BloggingContext()
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DbPath = System.IO.Path.Join(path, "blogging.db");
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}
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public BloggingContext(DbContextOptions options) : base(options)
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public BloggingContext(DbContextOptions<BloggingContext> options) : base(options)
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{
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Environment.SpecialFolder folder = Environment.SpecialFolder.LocalApplicationData;
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string? path = Environment.GetFolderPath(folder);
@@ -33,8 +35,23 @@ public BloggingContext(BloggingContext context)
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DbPath = context.DbPath;
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}
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public BloggingContext(BloggingContext context, string dbPath)
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{
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Blogs = context.Set<Blog>();
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Posts = context.Set<Post>();
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DbPath = dbPath;
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}
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//public BloggingContext(string dbPath)
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//{
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// DbPath = dbPath;
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//}
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// The following configures EF to create a Sqlite database file in the
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// special "local" folder for your platform.
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protected override void OnConfiguring(DbContextOptionsBuilder options)
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=> options.UseSqlite($"Data Source={DbPath}");
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}
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{
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if(!options.IsConfigured)
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options.UseSqlite($"Data Source={DbPath}");
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}
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}

‎亂七八糟/亂七八糟.DataAccessLayer/Migrations/20250305211823_AddBlogAndPost.Designer.cs‎

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‎亂七八糟/亂七八糟.DataAccessLayer/Migrations/20250305211823_AddBlogAndPost.cs‎

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using Microsoft.EntityFrameworkCore.Migrations;
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#nullable disable
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namespace 亂七八糟.DataAccessLayer.Migrations
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{
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/// <inheritdoc />
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public partial class AddBlogAndPost : Migration
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{
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/// <inheritdoc />
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protected override void Up(MigrationBuilder migrationBuilder)
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{
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migrationBuilder.CreateTable(
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name: "Blogs",
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columns: table => new
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{
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BlogId = table.Column<int>(type: "INTEGER", nullable: false)
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.Annotation("Sqlite:Autoincrement", true),
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Url = table.Column<string>(type: "TEXT", nullable: false)
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},
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constraints: table =>
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{
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table.PrimaryKey("PK_Blogs", x => x.BlogId);
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});
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migrationBuilder.CreateTable(
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name: "Posts",
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columns: table => new
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{
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PostId = table.Column<int>(type: "INTEGER", nullable: false)
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.Annotation("Sqlite:Autoincrement", true),
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Title = table.Column<string>(type: "TEXT", nullable: false),
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Content = table.Column<string>(type: "TEXT", nullable: false),
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BlogId = table.Column<int>(type: "INTEGER", nullable: false)
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},
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constraints: table =>
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{
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table.PrimaryKey("PK_Posts", x => x.PostId);
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table.ForeignKey(
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name: "FK_Posts_Blogs_BlogId",
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column: x => x.BlogId,
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principalTable: "Blogs",
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principalColumn: "BlogId",
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onDelete: ReferentialAction.Cascade);
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});
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migrationBuilder.CreateIndex(
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name: "IX_Posts_BlogId",
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table: "Posts",
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column: "BlogId");
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}
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/// <inheritdoc />
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protected override void Down(MigrationBuilder migrationBuilder)
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{
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migrationBuilder.DropTable(
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name: "Posts");
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migrationBuilder.DropTable(
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name: "Blogs");
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}
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}
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}

‎亂七八糟/亂七八糟.DataAccessLayer/Migrations/BloggingContextModelSnapshot.cs‎

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// <auto-generated />
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Infrastructure;
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using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
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using 亂七八糟.DataAccessLayer;
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#nullable disable
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namespace 亂七八糟.DataAccessLayer.Migrations
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{
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[DbContext(typeof(BloggingContext))]
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partial class BloggingContextModelSnapshot : ModelSnapshot
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{
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protected override void BuildModel(ModelBuilder modelBuilder)
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{
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#pragma warning disable 612, 618
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modelBuilder.HasAnnotation("ProductVersion", "9.0.2");
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modelBuilder.Entity("亂七八糟.DataAccessLayer.Blog", b =>
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{
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b.Property<int>("BlogId")
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.ValueGeneratedOnAdd()
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.HasColumnType("INTEGER");
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b.Property<string>("Url")
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.IsRequired()
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.HasColumnType("TEXT");
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b.HasKey("BlogId");
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b.ToTable("Blogs");
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});
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modelBuilder.Entity("亂七八糟.DataAccessLayer.Post", b =>
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{
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b.Property<int>("PostId")
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.ValueGeneratedOnAdd()
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.HasColumnType("INTEGER");
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b.Property<int>("BlogId")
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.HasColumnType("INTEGER");
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b.Property<string>("Content")
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.IsRequired()
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.HasColumnType("TEXT");
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b.Property<string>("Title")
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.IsRequired()
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.HasColumnType("TEXT");
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b.HasKey("PostId");
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b.HasIndex("BlogId");
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b.ToTable("Posts");
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});
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modelBuilder.Entity("亂七八糟.DataAccessLayer.Post", b =>
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{
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b.HasOne("亂七八糟.DataAccessLayer.Blog", "Blog")
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.WithMany("Posts")
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.HasForeignKey("BlogId")
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.OnDelete(DeleteBehavior.Cascade)
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.IsRequired();
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b.Navigation("Blog");
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});
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modelBuilder.Entity("亂七八糟.DataAccessLayer.Blog", b =>
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{
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b.Navigation("Posts");
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});
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#pragma warning restore 612, 618
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}
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}
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}

‎亂七八糟/亂七八糟.DataAccessLayer/Program.cs‎

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using System;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using System;
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using System.Linq;
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using 亂七八糟.DataAccessLayer;
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/// <param name="args"></param>
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public static async Task Main(string[] args)
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{
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await using var db = new BloggingContext();
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// Note: This sample requires the database to be created before running.
18-
Console.WriteLine($"Database path: {db.DbPath}.");
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// Create
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Console.WriteLine("Inserting a new blog");
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db.Add(new Blog { Url = "http://blogs.msdn.com/adonet" });
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db.SaveChanges();
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// Read
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Console.WriteLine("Querying for a blog");
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var blog = db.Blogs
28-
.OrderBy(b => b.BlogId)
29-
.First();
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// Update
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Console.WriteLine("Updating the blog and adding a post");
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blog.Url = "https://devblogs.microsoft.com/dotnet";
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blog.Posts.Add(
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new Post { Title = "Hello World", Content = "I wrote an app using EF Core!" });
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db.SaveChanges();
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// Delete
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Console.WriteLine("Delete the blog");
40-
db.Remove(blog);
41-
db.SaveChanges();
42-
18+
var host = Host.CreateDefaultBuilder(args)
19+
.ConfigureServices(services =>
20+
{
21+
services.AddDbContext<BloggingContext>(options =>
22+
options.UseSqlite("Data Source=blogging.db"));
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}).Build();
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using (var scope = host.Services.CreateScope())
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{
27+
await using var db = new BloggingContext();
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db.Database.EnsureCreated();
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// Note: This sample requires the database to be created before running.
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Console.WriteLine($"Database path: {db.DbPath}.");
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// Create
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Console.WriteLine("Inserting a new blog");
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db.Add(new Blog { Url = "http://blogs.msdn.com/adonet" });
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db.SaveChanges();
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// Read
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Console.WriteLine("Querying for a blog");
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var blog = db.Blogs
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.OrderBy(b => b.BlogId)
42+
.First();
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// Update
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Console.WriteLine("Updating the blog and adding a post");
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blog.Url = "https://devblogs.microsoft.com/dotnet";
47+
blog.Posts.Add(
48+
new Post { Title = "Hello World", Content = "I wrote an app using EF Core!" });
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db.SaveChanges();
50+
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// Delete
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Console.WriteLine("Delete the blog");
53+
db.Remove(blog);
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db.SaveChanges();
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}
4356
}
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}

‎亂七八糟/亂七八糟.DataAccessLayer/README.md‎

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# README
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## dacpac

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