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Merged
Stephanvs merged 1 commit into from
Aug 9, 2026
Merged

chore: entity framework core example project #12

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1 change: 1 addition & 0 deletions d2lang-cs.slnx
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
<Solution>
<Folder Name="/example/">
<Project Path="example/cli/d2-sample-cli.csproj" />
<Project Path="example/entity-framework-core/d2-sample-ef-core.csproj" />
</Folder>
<Project Path="src/d2lang-cs.csproj" />
<Project Path="src/D2Lang.EntityFrameworkCore/D2Lang.EntityFrameworkCore.csproj" />
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39 changes: 39 additions & 0 deletions example/entity-framework-core/Program.cs
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using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var builder = Host.CreateApplicationBuilder(args);

builder.Services
.AddDbContext<BlogDbContext>(options => options.UseSqlite("Data Source=blog.db"))
.AddD2Schema<BlogDbContext>("database-schema.d2");

using var host = builder.Build();
await host.StartAsync();
await host.StopAsync();

internal sealed class BlogDbContext : DbContext
{
public BlogDbContext(DbContextOptions<BlogDbContext> options)
: base(options)
{
}

public DbSet<Blog> Blogs => Set<Blog>();
public DbSet<Post> Posts => Set<Post>();
}

internal sealed class Blog
{
public int Id { get; set; }
public string Name { get; set; } = string.Empty;
public List<Post> Posts { get; set; } = new();
}

internal sealed class Post
{
public int Id { get; set; }
public string Title { get; set; } = string.Empty;
public int BlogId { get; set; }
public Blog Blog { get; set; } = null!;
}
21 changes: 21 additions & 0 deletions example/entity-framework-core/d2-sample-ef-core.csproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net10.0</TargetFramework>
<RootNamespace>d2_sample_ef_core</RootNamespace>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<IsPackable>false</IsPackable>
</PropertyGroup>

<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.10" />
<PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.10" />
</ItemGroup>

<ItemGroup>
<ProjectReference Include="..\..\src\D2Lang.EntityFrameworkCore\D2Lang.EntityFrameworkCore.csproj" />
</ItemGroup>

</Project>
12 changes: 12 additions & 0 deletions example/entity-framework-core/database-schema.d2
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Blogs: {
Id: INTEGER NOT NULL { constraint: primary_key }
Name: TEXT NOT NULL
shape: sql_table
}
Posts: {
Id: INTEGER NOT NULL { constraint: primary_key }
BlogId: INTEGER NOT NULL { constraint: foreign_key }
Title: TEXT NOT NULL
shape: sql_table
}
Posts.BlogId -> Blogs.Id