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Adding limitation for EFCore with multiple DbCommandInterceptor #164

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Dec 3, 2020
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Adding limitation for EFCore with multiple DbCommandInterceptor #164

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Adding limitation for EFCore with multiple DbCommandInterceptor
srprash Dec 3, 2020
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Adding doc ref for AsyncLocal
srprash Dec 3, 2020
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2 changes: 2 additions & 0 deletions README.md
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Expand Up @@ -395,6 +395,8 @@ For how to start with Entity Framework Core in an ASP.NET Core web app, please t
* You need to install `AWSXRayRecorder.Handlers.EntityFramework` nuget package. This package adds extension methods to the `DbContextOptionsBuilder` to make it easy to register AWS X-Ray interceptor.
* Not all database provider support Entity Framework Core 3.0 and above, please make sure that you are using the [Nuget package](https://docs.microsoft.com/en-us/ef/core/providers/?tabs=dotnet-core-cli) with a compatible version (EF Core >= 3.0).

*Known Limitation (as of 12-03-2020):* If you're using another `DbCommandInterceptor` implementation along with the `AddXRayInterceptor` in the `DbContext`, it may not work as expected and you may see a "EntityNotAvailableException" from the XRay EFCore interceptor. This is due to AsyncLocal not being able to maintain context across the `ReaderExecutingAsync` and `ReaderExecutedAsync` methods. Ref [here](https://github.com/dotnet/efcore/issues/22766) for more details on the issue.
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#### Setup

In order to trace SQL query, you can register your `DbContext` with `AddXRayInterceptor()` accordingly in the `ConfigureServices` method in `startup.cs` file.
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