Qrtix.RepositoryPattern.Abstractions 4.0.0

Repository Pattern Abstractions

A library for implementing generic repositories and unit of work with Entity Framework Core. This implementation uses a single instance of the DbContext for all repositories to avoid concurrency issues.

Consult the online documentation for more details.

Table of Contents

• Installation
• Creating the DbContext
• Creating the Repository Implementation
• Creating the Unit Of Work implementation
• Injecting the RepositoryPattern's Services
• Repository Pattern Implementations

Installation

Using the NuGet package manager console within Visual Studio run the following command:

Install-Package Ortix.RepositoryPattern.Abstractions

Or using the .NET Core CLI from a terminal window:

dotnet add package Qrtix.RepositoryPattern.Abstractions

Creating the DbContext

Create your DbContext inheriting from Microsoft.EntityFrameworkCore.DbContext:

public class MyDbContext : DbContext
{
    public DbSet<Product> Products { get; set; }  

    protected override void OnModelCreating(ModelBuilder modelBuilder)
	{
		modelBuilder.ApplyConfigurationsFromAssembly(Assembly.GetExecutingAssembly());
		base.OnModelCreating(modelBuilder);
	}
}

Configure your DbContext in the Program class:

builder.Services.AddDbContext<DbContext, SuinQShopModuleDbContext>(opt =>
    {
        opt.UseSqlServer(builder.Configuration.GetConnectionString("ConnectionString"));
    });

Creating the Repository Implementation

Create your repository implementation inheriting from IRepository<TEntity>:

public class ProductRepository : IRepository<TEntity> where TEntity : class
{
	private readonly DbSet<TEntity> _dbSet;
	private readonly DbContext _context;
	
    public IQueryable<TEntity> Data => _dbSet;


	public async Task<IQueryable<TEntity>> GetManyAsync(Expression<Func<TEntity, bool>>? filters = null,
		bool disableTracking = true,
		IEnumerable<Expression<Func<TEntity, object>>>? includes = null,
		Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>>? orderBy = null,
		CancellationToken cancellationToken = default)
	{
		// implementation
	}

	public IQueryable<TEntity> GetMany(Expression<Func<TEntity, bool>>? filters = null,
		bool disableTracking = false,
		IEnumerable<Expression<Func<TEntity, object>>>? includes = null,
		Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>>? orderBy = null)
		{
            // implementation
        }

	// others implementation 
}

Creating the Unit Of Work implementation

Create your unit of work implementation inheriting from IUnitOfWork:

class UnitOfWork : IUnitOfWork
{
	private readonly DbContext _context;
	private IDbContextTransaction? _transaction;
	private readonly Dictionary<string, object> _repositories;

	public UnitOfWork(DbContext context)
	{
		_context = context;
		_repositories = new Dictionary<string, object>();
	}

	public void Dispose()
	{
		// implementation
	}


	public async ValueTask DisposeAsync()
	{
		// implementation
	}

	public IRepository<TEntity> Repository<TEntity>() where TEntity : class
	{
		// implementation
	}

	// others implementations

Injecting the RepositoryPattern's Services

Add the RepositoryPattern services to the Service Collection:

builder.Services.AddRepositoryPattern(options => {
    options.UseRepositoryImplementation(typeof(Repository<>)
    	.UseUnitOfWorkImplementation<UnitOfWork>();
});

The default scope for injected services is scoped. If you want to change it, refer to the next example:

builder.Services.AddRepositoryPattern(options => {
    options.UseRepositoryImplementation(typeof(Repository<>)
    	.UseUnitOfWorkImplementation<UnitOfWork>();
}, ServiceLifeTime.Transient);

Repository Pattern Implementations

While the RepositoryPattern.Abstractions provides the necessary abstractions for implementing generic repositories and unit of work, it's recommended to use one of the specialized libraries that build upon these abstractions for specific data access technologies.

For Entity Framework Core, consider using the RepositoryPattern.EntityFrameworkCore library, which enhances compatibility and simplifies integration with EF Core features. For more information consult the Readme file or the online documentation.