Pavel Nasovich's Blog The Moderately Enthusiastic Programmer

Today I Learned: SharpRepository

I absolutely forgot about the blog. My bad. Let’s add something interesting about C#.

SharpRepository

SharpRepository is a generic repository written in C# which includes support for various relational, document and object databases including Entity Framework, RavenDB, MongoDB, CouchDB and Db4o. SharpRepository includes Xml and InMemory repository implementations as well. SharpRepository offers built-in caching options for AppFabric, memcached and the standard System.Runtime.Caching. SharpRepository also supports Specifications, FetchStrategies, Batches and Traits.

To install SharpRepository, run the following command in the Package Manager Console

PM> Install-Package SharpRepository.Repository

All information about SharpRepository you can find on github

One of the most interesting question was about Entity Framework and Include functionality. For example, you have CurrencyRate class:

public class CurrencyRate
{
    public int Id { get; set; }
	
    public string Name { get; set; }

    public int BranchBankId { get; set; }

    [ForeignKey("BranchBankId")]
    public BankBranch BankBranch { get; set; }
}

And you need to get information about the BankBranch. There are 2 general ways to query the repository:

  1. Use a predicate in query
  2. Use a Specification object that holds predicate.

The equivalent of the EF Include statements are set in a Specification object and called a FetchStrategy.

var spec = new Specification<CurrencyRate>(b => b.Name == name);

spec.FetchStrategy.Include(b => b.BankBranch);
CurrencyRate currencyRate;
if (currencyRateRepository.TryFind(spec, out currencyRate))
{
	// ... some logic with BankBranch
}
comments powered by Disqus