WriteRepositoryBase

Namespace: RA.Utilities.Data.EntityFramework

The WriteRepositoryBase<T> class is a concrete implementation of a generic, write-only repository using Entity Framework Core. Its primary purpose is to provide a standardized way to modify data in a database (Create, Update, Delete) while preventing any read operations.

This class is a key component for implementing the Command Query Separation (CQS) principle. It represents the "Command" side, where the sole responsibility is to change the state of the system.

🔑 Key Purposes and Benefits

1. Enforces Write-Only Access:

By using or inheriting from WriteRepositoryBase, you create a data access component that is guaranteed to only have methods for mutating data, such as AddAsync, UpdateAsync, and DeleteAsync. This is ideal for the "Command" side of a CQRS architecture or any service whose only job is to process state changes.

2. Promotes Clean Architecture:

It allows your application services to depend on a specific, write-only contract (IWriteRepositoryBase<T>). This makes the intent of your code exceptionally clear and prevents developers from accidentally querying data in a part of the application that is only supposed to modify it.

3. Accelerates Development:

It provides ready-to-use implementations for all the common data modification operations defined in the IWriteRepositoryBase<T> interface. This saves you from writing this repetitive boilerplate code for every entity in your system.

In short, WriteRepositoryBase is a specialized tool for building the command side of your data access layer. It's designed to be safe, explicit, and to help you maintain a clean, separated architecture.

🧐 Code Example

Here is how you might use it in a service that handles commands, based on the patterns in the documentation:

// In a service that only needs to write data
public class ProductCommandService
{
    // Inject the write-only repository for Products
    private readonly IWriteRepositoryBase<Product> _productWriteRepository;

    public ProductCommandService(IWriteRepositoryBase<Product> productWriteRepository, IUnitOfWork unitOfWork)
    {
        _productWriteRepository = productWriteRepository;
    }

    public async Task CreateNewProduct(string name, decimal price)
    {
        var newProduct = new Product { Name = name, Price = price };

        // This repository only has write methods, preventing any accidental reads.
        await _productWriteRepository.AddAsync(newProduct);

        // The UnitOfWork is responsible for saving the change to ensure transactional integrity.
        await _productWriteRepository.SaveChangesAsync();
    }
}

This example demonstrates how the ProductCommandService is restricted to only writing Product data.