Reactive extension wrappers for *hot* observables of Entity Framework
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Reactive extension wrappers for hot observables of Entity Framework entities.

This repo contains the code for both the EntityFramework and EntityFrameworkCore projects.


Simply install the NuGet package for EF6 or EF Core

EF version .NET support NuGet package
6.1.3 >= 4.6.1 NuGet Status
Core 2.0 >= 4.6.1 || >= Standard 2.0 NuGet Status


DbObservable contains methods for each event type supported, which return an IObservable.

  • FromInserting
  • FromInsertFailed
  • FromInserted
  • FromUpdating
  • FromUpdated
  • FromUpdateFailed
  • FromDeleting
  • FromDeleted
  • FromDeleteFailed
var birthdayMessage = DbObservable<Context>.FromInserted<Person>()
                                           .Where(x => x.Entity.DateOfBirth.Month == DateTime.Today.Month
                                                    && x.Entity.DateOfBirth.Day == DateTime.Today.Day)
                                           .Subscribe(entry => Console.WriteLine($"Happy birthday to {entry.Entity.Name}!"));


Specifying a DbContext type with DbObservable<T> will contrain events to entities in a DbContext instance of that type.

Events provided by this library and the library which supports it (EntityFramework.Triggers) are co-variant. You can use a base class as T in DbObservable<T> and the events will be raised as expected.


  1. Create an issue
  2. Let's find some point of agreement on your suggestion.
  3. Fork it!
  4. Create your feature branch: git checkout -b my-new-feature
  5. Commit your changes: git commit -am 'Add some feature'
  6. Push to the branch: git push origin my-new-feature
  7. Submit a pull request :D


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MIT License