Add RavenDB Database support

[mgochmuradov]

Feature Request

Please add support for RavenDB document database

Additional Information

Mentioned in both Gartner and Forrester research, RavenDB is a pioneer in NoSQL database technology with over 2 million downloads and thousands of customers from Startups to Fortune 100 Large Enterprises.

Over 1,000 businesses use RavenDB for IoT, Big Data, Microservices Architecture, fast performance, a distributed data network, and everything you need to support a modern application stack for today's user.

For more info: https://ravendb.net/about

[AlphaComposite]

It's the only thing holding us back from moving forward with ABP at the moment.

[hikalkan]

Good news: A contributor is working on this now.

[AlphaComposite]

Good news: A contributor is working on this now.

This is excellent news!

Has any code been committed anywhere yet?

[mgochmuradov]

Any updates on this?

[hikalkan]

@gterdem is working on it :) @gterdem, if you are developing it on a branch, please share it. If you have any problems, maybe someone can help it.

[gterdem]

Hello, I'll put pieces together and push it to a related branch.

[AlphaComposite]

Is a branch up?

[gterdem]

@AlphaComposite, @mgochmuradov Hello, I know this is not what you guys wanted to hear but I had to prioritize other issues, I am really sorry. It's on backlog with high-priority and will be done eventually, just not at the moment.

[djordjedjukic]

I would like to create RavenDB "plugin" for ABP. @gterdem Do you have some code already, so I can continue?

[djordjedjukic]

Hey @hikalkan, is there anyone who can help me something regarding this? Or do you maybe have some docs for db integrations which I can follow? Thanks

[gterdem]

Hello @djordjedjukic, sorry for late reply.

There is no code structure to continue to work on unfortunatelly. However you can fork and share the problem if I can help.

Thanks.

[djordjedjukic]

Hi, I got stuck with running tests. Probably some things are missing which I can't see at the moment. If somebody can help, please let me know.

[gterdem]

What exactly you are having problem with? Any repository to share your test code?

[djordjedjukic]

Here is the code: https://github.com/ravendb/abp/tree/feature/ravendb-integration/framework/test/Volo.Abp.RavenDB.Tests

I have issues with dependency injection when I run tests. I suspect that I didn't implement something that is required.

[aboutdomtime]

@djordjedjukic and @gterdem I started working on integrating RavenDb in ABP this past weekend. I am both new to ABP and RavenDb, but I've made some good progress. I am experiencing some issues while running tests.

I getting: Volo.Abp.Uow.UnitOfWorkInterceptor, Volo.Abp.Uow, Version=4.3.3.0, Culture=neutral, PublicKeyToken=null]]' has not been registered.****

While trying to resolve an instance of IRespository: repository = GetRequiredService<IRepository<Person, Guid>>();

I used the Mongo and EF modules as a starting point.

[aboutdomtime]

I solved the issue. I need to add a DependsOn for typeof(AbpAutofacModule)

[djordjedjukic]

hey @aboutdomtime, did you have any progress on this?

[aboutdomtime]

@djordjedjukic Yes, I have most of the test cases passing. I can do a fork if that's something that you want to work on together.

[DejanMilicic]

@aboutdomtime That would be awesome, please do

[mgochmuradov]

Here is the code: https://github.com/ravendb/abp/tree/feature/ravendb-integration/framework/test/Volo.Abp.RavenDB.Tests

I have issues with dependency injection when I run tests. I suspect that I didn't implement something that is required.

@djordjedjukic The problem is (As I can see) that you don't register a repository for each AgregateRoot/Entity.

Long answer:

RepositoryRegistrarBase which is the base class of RavenDbRepositoryRegistrar, by its' implementation will get list of entities from GetEntityTypes(Type dbContextType) and add a RavenDbRepository implementation for each entity. And as you return null on this method, no implementation is registered within DI.

Background:

The collection is just a virtual concept

As RavenDB is a schemaless database, there is no need (not sure if it is possible at all) for entities to be registered beforehand (like DbSet<> in EF). Whenever an entity is stored, a virtual collection is created.

Possible solutions:

1. Create something similar to DbContext and add predefined Collection<> properties to it, then register IRpository<> implementations for each of these entities.
2. Register a Generic implementation of IRepository<> that will be used for all entities unless overridden with an explicit implementation.

[mgochmuradov]

@DejanMilicic @djordjedjukic I had good progress with this last week. DI and other ABP related issues are gone, but some RavenDB related coding and optimizations should still be done:

• [ ] Map ConcurrencyStamp from the ChangeVector.
• [ ] Bulk operations should be optimized for RavenDB.
• [ ] IAsyncQueriableProvide should be implemented for RavenDB.
• [x] Fix RavenDB TestRunner issue (Should be started only once)
• [ ] Id issues, should be configured for string and int (incremental)
• [ ] DbContext should be registered by Convensions.
• [ ] ConnectionString Helper for RavenDB.

Here is the Repo: https://github.com/mgochmuradov/abp/tree/feature/ravendb-integration