Support to multiple databases in application

Hi @hikalkan,

I wanna know how I can use multiple databases in my application. There are any attribute and/or interface to decorate repository to use a specific connectionString/database in repository.

PS: I’m new in ABP, I read the documentation and I don’t found anything to help me.

Could be anything like this:

[UseDatabase("ConnectionStringName")]
public class TaskRepository : SimpleTaskSystemRepositoryBase<Task, long>, ITaskRepository
{
    public TaskRepository(IDbContextProvider<SimpleTaskSystemDbContext> dbContextProvider)
        : base(dbContextProvider)
    {
    }
}

Thanks,

[hikalkan]

Hi,

It can not be in repository level, but in dbcontext level. Why don’t you create more than one dbcontext? There is an example: https://github.com/aspnetboilerplate/aspnetboilerplate-samples/tree/master/MultipleDbContextDemo

[hikalkan]

Hi,

Solution 1

The best way, without workaround is to use different classes. For instance, you can derive from Person as a SecondPerson entity and use Person in first dbcontext and use SecondPerson in the second one. In this way, no additional setting is needed, it will just work as expected.

Solution 2

_unitOfWorkManager.Current.SetContextId(firstDbId) makes your code EF depended. If this is not a problem, then

1. Resolve all implementations of a given repository:

iocManager.IocContainer.ResolveAll<IRepository<Person>>();

(inject IIocManager interface as iocManager)

1. Once you get instances, you can cast them to IRepositoryWithDbContext and use GetDbContext() method. Then check if the given DbContext is the one you want.

You can create a helper method to not repeat yourself every time you need that.