Entity-Framework-Core.md

Entity Framework Core Integration

This document explains how to integrate EF Core as an ORM provider to ABP based applications and how to configure it.

Installation

Volo.Abp.EntityFrameworkCore is the main nuget package for the EF Core integration. Install it to your project (for a layered application, to your data/infrastructure layer):

Install-Package Volo.Abp.EntityFrameworkCore

Then add AbpEntityFrameworkCoreModule module dependency to your module:

using Volo.Abp.EntityFrameworkCore;
using Volo.Abp.Modularity;

namespace MyCompany.MyProject
{
    [DependsOn(typeof(AbpEntityFrameworkCoreModule))]
    public class MyModule : AbpModule
    {
        //...
    }
}

Creating DbContext

You can create your DbContext as you normally do. It should be derived from AbpDbContext<T> as shown below:

using Microsoft.EntityFrameworkCore;
using Volo.Abp.EntityFrameworkCore;

namespace MyCompany.MyProject
{
    public class MyDbContext : AbpDbContext<MyDbContext>
    {
        //...your DbSet properties

        public MyDbContext(DbContextOptions<MyDbContext> options)
            : base(options)
        {
        }
    }
}

Registering DbContext To Dependency Injection

Use AddAbpDbContext method in your module to register your DbContext class for dependency injection system.

using Microsoft.Extensions.DependencyInjection;
using Volo.Abp.EntityFrameworkCore;
using Volo.Abp.Modularity;

namespace MyCompany.MyProject
{
    [DependsOn(typeof(AbpEntityFrameworkCoreModule))]
    public class MyModule : AbpModule
    {
        public override void ConfigureServices(IServiceCollection services)
        {
            services.AddAbpDbContext<MyDbContext>();

            //...
        }
    }
}

Add Default Repositories

ABP can automatically create repositories (TODO: link) for the entities in your DbContext. Just use AddDefaultRepositories() option on registration:

services.AddAbpDbContext<MyDbContext>(options =>
{
    options.AddDefaultRepositories();
});

This will create a repository for each aggreate root entity (classes derived from AggregateRoot) by default. If you want to create repositories for other entities too, then set includeAllEntities to true:

services.AddAbpDbContext<MyDbContext>(options =>
{
    options.AddDefaultRepositories(includeAllEntities: true);
});

Then you can inject and use IRepository<TEntity> or IQueryableRepository<TEntity> in your services.

Add Custom Repositories

TODO...

Set Base DbContext Class or Interface for Default Repositories

...

Replace Other Repository

...