Argon.Extensions.EntityFrameworkCore

Source code generators and utilities for Entity Framework Core.

📦 Installation

dotnet add package Argon.Extensions.EntityFrameworkCore

✨ Features

• Empty constructor generator for EF Core entities
• [EmptyConstructible] attribute to automatically generate a protected empty constructor
• Useful for entities with parameterized constructors

🚀 Usage

Generating an empty constructor

Entity Framework Core requires entities to have a parameterless constructor. When you have entities with required parameters, this can be problematic. The [EmptyConstructible] attribute solves this by generating a protected parameterless constructor.

using Argon.Extensions.EntityFrameworkCore.Attributes;

[EmptyConstructible]
public partial class User
{
    public User(string name, string email)
    {
        Name = name;
        Email = email;
    }
    
    public int Id { get; set; }
    public string Name { get; set; }
    public string Email { get; set; }
}

// A protected empty constructor is automatically generated for EF Core:
// protected User() { }

Important notes

⚠️ The class must be marked as partial for the source generator to work.

The generated constructor is protected, which means:

• Entity Framework Core can use it
• Your domain code cannot accidentally create invalid instances
• You maintain strong constructor constraints in your business logic

📝 API Reference

Attributes

EmptyConstructibleAttribute

Marks a class to have an empty protected constructor generated.

Usage:

[EmptyConstructible]
public partial class MyEntity
{
    // Your code here
}

Requirements:

• The class must be partial
• If the class already has an empty constructor, a warning (AREX0001) will be generated

Diagnostics

🔗 Links

• Back to main project
• NuGet Package