Try to set GUID Id in the InsertAsync method of the EF Core repository

[hikalkan]

In this way, we don't need to wait until SaveChangesAsync if we use GUID Id but not set it before InsertAsync call.
It is currently like that for the MongoDbRepository.

Note: Apply the same logic inside the AbpDbContext.CheckAndSetId

[gdlcf88]

Greate! It also ensures that the Ids of all new entities are generated by IGuidGenerator by default (except unfortunately for new entities of navigation properties).

[dicksonkimeu]

This will be great. I had to write alot of code since this was missing. I.e to ensure uniqueness of records before saving to db etc