DRN.Framework.EntityFramework 0.2.2-preview005

DRN.Framework.EntityFramework provides DrnContext with conventions to develop rapid and effective domain models.

DRNContext

DrnContext has following unique features:

• Implements IDesignTimeDbContextFactory to enable migrations from dbContext defining projects.
• Implements IDesignTimeServices to support multi context projects with default output directories in the context specific folder.
• Uses HasDrnContextServiceCollectionModule attribute for automatic registration with AddServicesWithAttributes service collection extension method.
• Uses context name (typeof(TContext).Name) as connection string key by convention.
• Automatically applies IEntityTypeConfiguration implementations from the assembly whose namespace contains the derived context's namespace.
• Automatically marks Entities derived from DRN.Framework.SharedKernel.Domain.Entity as created, modified or deleted.
• Enables DRN.Framework.Testing to create easy and effective integration tests with conventions and automatic registrations.
  • Application modules can be registered without any modification to TestContext
  • TestContext's ContainerContext
    • creates a postgresql container then scans TestContext's service collection for inherited DrnContexts.
    • Adds a connection strings to TestContext's configuration for each DrnContext according to convention.
  • TestContext acts as a ServiceProvider and when a service is requested it can build it from service collection with all dependencies.

namespace DRN.Framework.EntityFramework.Context;

[HasDrnContextServiceCollectionModule]
public abstract class DrnContext<TContext> : DbContext, IDesignTimeDbContextFactory<TContext>, IDesignTimeServices where TContext : DbContext, new()
{ 
...

public class HasDrnContextServiceCollectionModuleAttribute : HasServiceCollectionModuleAttribute
{
    static HasDrnContextServiceCollectionModuleAttribute()
    {
        ModuleMethodInfo = typeof(ServiceCollectionExtensions).GetMethod(nameof(ServiceCollectionExtensions.AddDbContextsWithConventions))!;
    }
}

Example Usage

namespace Sample.Infra;

public static class InfraModule
{
    public static IServiceCollection AddSampleInfraServices(this IServiceCollection sc)
    {
        sc.AddServicesWithAttributes();

        return sc;
    }
}

public class QAContext : DrnContext<QAContext>
{
    public QAContext(DbContextOptions<QAContext> options) : base(options)
    {
    }

    public QAContext() : base(null)
    {
    }

    public DbSet<User> Users { get; set; }
    public DbSet<Question> Questions { get; set; }
    public DbSet<Answer> Answers { get; set; }
    public DbSet<QuestionComment> Comments { get; set; }
    public DbSet<Category> Categories { get; set; }
    public DbSet<Tag> Tags { get; set; }
}

Development Environment Configurations

Following configuration options added to minimize development environment creation efforts:

• DrnContext development connection string will be auto generated when
  • Environment configuration key set as Development and,
  • DrnContext_DevPassword configuration key set and,
  • No other connection string is provided for the DbContexts.
• Following keys can set optionally according to DbContextConventions;
  • DrnContext_AutoMigrateDevEnvironment
    • When set true applies migrations automatically
  • DrnContext_DevHost
  • DrnContext_DevPort
  • DrnContext_DevUsername
    • default is postgres
  • DrnContext_DevDatabase
    • default is drnDb

DrnContext_DevPassword and DrnContext_AutoMigrateDevEnvironment should be enough to start a hosted service that has DrnContext dependencies.

For instance:

• When a Postgresql helm chart is used for dev environment and it creates a password secret automatically,
• Then only defining a volume mount should be enough for database configuration.

Global Usings

global using DRN.Framework.EntityFramework.Context;
global using Microsoft.EntityFrameworkCore;
global using DRN.Framework.Utils.DependencyInjection;

Commit Info

Author: Duran Serkan KILIÇ
Date: 2024-03-10 21:11:34 +0300
Hash: 758d3a3bbe39cc018d64f55d656dcd0f794ac917